Cloud Firestore में डेटा जोड़ें

Cloud Firestore में डेटा लिखने के कई तरीके हैं:

  • दस्तावेज़ पहचानकर्ता को स्पष्ट रूप से निर्दिष्ट करते हुए, संग्रह के भीतर दस्तावेज़ का डेटा सेट करें।
  • संग्रह में एक नया दस्तावेज़ जोड़ें। इस मामले में, क्लाउड फायरस्टोर स्वचालित रूप से दस्तावेज़ पहचानकर्ता उत्पन्न करता है।
  • स्वचालित रूप से जेनरेट किए गए पहचानकर्ता के साथ एक खाली दस्तावेज़ बनाएं, और बाद में उसे डेटा असाइन करें।

यह मार्गदर्शिका बताती है कि Cloud Firestore में अलग-अलग दस्तावेज़ों के सेट का उपयोग, जोड़ने या अद्यतन करने का तरीका क्या है। यदि आप बल्क में डेटा लिखना चाहते हैं, तो लेन-देन और बैचेड राइट्स देखें।

दस्तावेज़ सेट करें

किसी एकल दस्तावेज़ को बनाने या अधिलेखित करने के लिए, set() विधि का उपयोग करें:

Web version 9

import { doc, setDoc } from "firebase/firestore"; 

// Add a new document in collection "cities"
await setDoc(doc(db, "cities", "LA"), {
  name: "Los Angeles",
  state: "CA",
  country: "USA"
});
set_document.js

Web version 8

// Add a new document in collection "cities"
db.collection("cities").doc("LA").set({
    name: "Los Angeles",
    state: "CA",
    country: "USA"
})
.then(() => {
    console.log("Document successfully written!");
})
.catch((error) => {
    console.error("Error writing document: ", error);
});
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// Add a new document in collection "cities"
db.collection("cities").document("LA").setData([
    "name": "Los Angeles",
    "state": "CA",
    "country": "USA"
]) { err in
    if let err = err {
        print("Error writing document: \(err)")
    } else {
        print("Document successfully written!")
    }
}
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// Add a new document in collection "cities"
[[[self.db collectionWithPath:@"cities"] documentWithPath:@"LA"] setData:@{
  @"name": @"Los Angeles",
  @"state": @"CA",
  @"country": @"USA"
} completion:^(NSError * _Nullable error) {
  if (error != nil) {
    NSLog(@"Error writing document: %@", error);
  } else {
    NSLog(@"Document successfully written!");
  }
}];
ViewController.m

Java

Map<String, Object> city = new HashMap<>();
city.put("name", "Los Angeles");
city.put("state", "CA");
city.put("country", "USA");

db.collection("cities").document("LA")
        .set(city)
        .addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {
                Log.d(TAG, "DocumentSnapshot successfully written!");
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "Error writing document", e);
            }
        });
DocSnippets.java

Kotlin+KTX

val city = hashMapOf(
        "name" to "Los Angeles",
        "state" to "CA",
        "country" to "USA"
)

db.collection("cities").document("LA")
        .set(city)
        .addOnSuccessListener { Log.d(TAG, "DocumentSnapshot successfully written!") }
        .addOnFailureListener { e -> Log.w(TAG, "Error writing document", e) }
DocSnippets.kt

Dart

final city = <String, String>{
  "name": "Los Angeles",
  "state": "CA",
  "country": "USA"
};

db
    .collection("cities")
    .doc("LA")
    .set(city)
    .onError((e, _) => print("Error writing document: $e"));
firestore.dart
जावा
// Create a Map to store the data we want to set
Map<String, Object> docData = new HashMap<>();
docData.put("name", "Los Angeles");
docData.put("state", "CA");
docData.put("country", "USA");
docData.put("regions", Arrays.asList("west_coast", "socal"));
// Add a new document (asynchronously) in collection "cities" with id "LA"
ApiFuture<WriteResult> future = db.collection("cities").document("LA").set(docData);
// ...
// future.get() blocks on response
System.out.println("Update time : " + future.get().getUpdateTime());
ManageDataSnippets.java
अजगर
data = {
    u'name': u'Los Angeles',
    u'state': u'CA',
    u'country': u'USA'
}

# Add a new doc in collection 'cities' with ID 'LA'
db.collection(u'cities').document(u'LA').set(data)
snippets.py

Python

data = {"name": "Los Angeles", "state": "CA", "country": "USA"}

# Add a new doc in collection 'cities' with ID 'LA'
await db.collection("cities").document("LA").set(data)
snippets.py
सी++
// Add a new document in collection 'cities'
db->Collection("cities")
    .Document("LA")
    .Set({{"name", FieldValue::String("Los Angeles")},
          {"state", FieldValue::String("CA")},
          {"country", FieldValue::String("USA")}})
    .OnCompletion([](const Future<void>& future) {
      if (future.error() == Error::kErrorOk) {
        std::cout << "DocumentSnapshot successfully written!" << std::endl;
      } else {
        std::cout << "Error writing document: " << future.error_message()
                  << std::endl;
      }
    });
snippets.cpp
Node.js
const data = {
  name: 'Los Angeles',
  state: 'CA',
  country: 'USA'
};

// Add a new document in collection "cities" with ID 'LA'
const res = await db.collection('cities').doc('LA').set(data);
index.js
जाओ
_, err := client.Collection("cities").Doc("LA").Set(ctx, map[string]interface{}{
	"name":    "Los Angeles",
	"state":   "CA",
	"country": "USA",
})
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
$data = [
    'name' => 'Los Angeles',
    'state' => 'CA',
    'country' => 'USA'
];
$db->collection('samples/php/cities')->document('LA')->set($data);
data_set_from_map.php
एकता
DocumentReference docRef = db.Collection("cities").Document("LA");
Dictionary<string, object> city = new Dictionary<string, object>
{
	{ "Name", "Los Angeles" },
	{ "State", "CA" },
	{ "Country", "USA" }
};
docRef.SetAsync(city).ContinueWithOnMainThread(task => {
	Debug.Log("Added data to the LA document in the cities collection.");
});
सी#
DocumentReference docRef = db.Collection("cities").Document("LA");
Dictionary<string, object> city = new Dictionary<string, object>
{
    { "name", "Los Angeles" },
    { "state", "CA" },
    { "country", "USA" }
};
await docRef.SetAsync(city);
Program.cs
माणिक
city_ref = firestore.doc "#{collection_path}/LA"

data = {
  name:    "Los Angeles",
  state:   "CA",
  country: "USA"
}

city_ref.set data
add_data.rb

यदि दस्तावेज़ मौजूद नहीं है, तो इसे बनाया जाएगा। यदि दस्तावेज़ मौजूद है, तो इसकी सामग्री को नए प्रदान किए गए डेटा के साथ अधिलेखित कर दिया जाएगा, जब तक कि आप निर्दिष्ट नहीं करते हैं कि डेटा को मौजूदा दस्तावेज़ में विलय किया जाना चाहिए, जैसा कि निम्नानुसार है:

Web version 9

import { doc, setDoc } from "firebase/firestore"; 

const cityRef = doc(db, 'cities', 'BJ');
setDoc(cityRef, { capital: true }, { merge: true });
set_with_merge.js

Web version 8

var cityRef = db.collection('cities').doc('BJ');

var setWithMerge = cityRef.set({
    capital: true
}, { merge: true });
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// Update one field, creating the document if it does not exist.
db.collection("cities").document("BJ").setData([ "capital": true ], merge: true)
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// Write to the document reference, merging data with existing
// if the document already exists
[[[self.db collectionWithPath:@"cities"] documentWithPath:@"BJ"]
     setData:@{ @"capital": @YES }
     merge:YES
     completion:^(NSError * _Nullable error) {
       // ...
     }];
ViewController.m

Java

// Update one field, creating the document if it does not already exist.
Map<String, Object> data = new HashMap<>();
data.put("capital", true);

db.collection("cities").document("BJ")
        .set(data, SetOptions.merge());
DocSnippets.java

Kotlin+KTX

// Update one field, creating the document if it does not already exist.
val data = hashMapOf("capital" to true)

db.collection("cities").document("BJ")
        .set(data, SetOptions.merge())
DocSnippets.kt

Dart

// Update one field, creating the document if it does not already exist.
final data = {"capital": true};

db.collection("cities").doc("BJ").set(data, SetOptions(merge: true));
firestore.dart
जावा
// asynchronously update doc, create the document if missing
Map<String, Object> update = new HashMap<>();
update.put("capital", true);

ApiFuture<WriteResult> writeResult =
    db.collection("cities").document("BJ").set(update, SetOptions.merge());
// ...
System.out.println("Update time : " + writeResult.get().getUpdateTime());
ManageDataSnippets.java
अजगर
city_ref = db.collection(u'cities').document(u'BJ')

city_ref.set({
    u'capital': True
}, merge=True)
snippets.py

Python

city_ref = db.collection("cities").document("BJ")

await city_ref.set({"capital": True}, merge=True)
snippets.py
सी++
db->Collection("cities").Document("BJ").Set(
    {{"capital", FieldValue::Boolean(true)}}, SetOptions::Merge());
snippets.cpp
Node.js
const cityRef = db.collection('cities').doc('BJ');

const res = await cityRef.set({
  capital: true
}, { merge: true });
index.js
जाओ
_, err := client.Collection("cities").Doc("BJ").Set(ctx, map[string]interface{}{
	"capital": true,
}, firestore.MergeAll)

if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
$cityRef = $db->collection('samples/php/cities')->document('BJ');
$cityRef->set([
    'capital' => true
], ['merge' => true]);
data_set_doc_upsert.php
एकता
DocumentReference docRef = db.Collection("cities").Document("LA");
Dictionary<string, object> update = new Dictionary<string, object>
{
	{ "capital", false }
};
docRef.SetAsync(update, SetOptions.MergeAll);
सी#
DocumentReference docRef = db.Collection("cities").Document("LA");
Dictionary<string, object> update = new Dictionary<string, object>
{
    { "capital", false }
};
await docRef.SetAsync(update, SetOptions.MergeAll);
Program.cs
माणिक
city_ref = firestore.doc "#{collection_path}/LA"
city_ref.set({ capital: false }, merge: true)
add_data.rb

यदि आप सुनिश्चित नहीं हैं कि दस्तावेज़ मौजूद है या नहीं, तो संपूर्ण दस्तावेज़ों को अधिलेखित करने से बचने के लिए नए डेटा को किसी मौजूदा दस्तावेज़ के साथ मर्ज करने का विकल्प पास करें। मानचित्र वाले दस्तावेज़ों के लिए, ध्यान दें कि एक खाली मानचित्र वाले फ़ील्ड के साथ एक सेट निर्दिष्ट करना लक्ष्य दस्तावेज़ के मानचित्र फ़ील्ड को अधिलेखित कर देगा।

डेटा के प्रकार

क्लाउड फायरस्टोर आपको एक दस्तावेज़ के अंदर विभिन्न प्रकार के डेटा लिखने देता है, जिसमें स्ट्रिंग्स, बूलियन्स, नंबर्स, डेट्स, नल, और नेस्टेड एरे और ऑब्जेक्ट शामिल हैं। Cloud Firestore हमेशा संख्याओं को डबल्स के रूप में संग्रहीत करता है, भले ही आप अपने कोड में किस प्रकार की संख्या का उपयोग करें।

Web version 9

import { doc, setDoc, Timestamp } from "firebase/firestore"; 

const docData = {
    stringExample: "Hello world!",
    booleanExample: true,
    numberExample: 3.14159265,
    dateExample: Timestamp.fromDate(new Date("December 10, 1815")),
    arrayExample: [5, true, "hello"],
    nullExample: null,
    objectExample: {
        a: 5,
        b: {
            nested: "foo"
        }
    }
};
await setDoc(doc(db, "data", "one"), docData);
data_types.js

Web version 8

var docData = {
    stringExample: "Hello world!",
    booleanExample: true,
    numberExample: 3.14159265,
    dateExample: firebase.firestore.Timestamp.fromDate(new Date("December 10, 1815")),
    arrayExample: [5, true, "hello"],
    nullExample: null,
    objectExample: {
        a: 5,
        b: {
            nested: "foo"
        }
    }
};
db.collection("data").doc("one").set(docData).then(() => {
    console.log("Document successfully written!");
});
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
let docData: [String: Any] = [
    "stringExample": "Hello world!",
    "booleanExample": true,
    "numberExample": 3.14159265,
    "dateExample": Timestamp(date: Date()),
    "arrayExample": [5, true, "hello"],
    "nullExample": NSNull(),
    "objectExample": [
        "a": 5,
        "b": [
            "nested": "foo"
        ]
    ]
]
db.collection("data").document("one").setData(docData) { err in
    if let err = err {
        print("Error writing document: \(err)")
    } else {
        print("Document successfully written!")
    }
}
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
NSDictionary *docData = @{
  @"stringExample": @"Hello world!",
  @"booleanExample": @YES,
  @"numberExample": @3.14,
  @"dateExample": [FIRTimestamp timestampWithDate:[NSDate date]],
  @"arrayExample": @[@5, @YES, @"hello"],
  @"nullExample": [NSNull null],
  @"objectExample": @{
    @"a": @5,
    @"b": @{
      @"nested": @"foo"
    }
  }
};

[[[self.db collectionWithPath:@"data"] documentWithPath:@"one"] setData:docData
    completion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error writing document: %@", error);
      } else {
        NSLog(@"Document successfully written!");
      }
    }];
ViewController.m

Java

Map<String, Object> docData = new HashMap<>();
docData.put("stringExample", "Hello world!");
docData.put("booleanExample", true);
docData.put("numberExample", 3.14159265);
docData.put("dateExample", new Timestamp(new Date()));
docData.put("listExample", Arrays.asList(1, 2, 3));
docData.put("nullExample", null);

Map<String, Object> nestedData = new HashMap<>();
nestedData.put("a", 5);
nestedData.put("b", true);

docData.put("objectExample", nestedData);

db.collection("data").document("one")
        .set(docData)
        .addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {
                Log.d(TAG, "DocumentSnapshot successfully written!");
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "Error writing document", e);
            }
        });
DocSnippets.java

Kotlin+KTX

val docData = hashMapOf(
        "stringExample" to "Hello world!",
        "booleanExample" to true,
        "numberExample" to 3.14159265,
        "dateExample" to Timestamp(Date()),
        "listExample" to arrayListOf(1, 2, 3),
        "nullExample" to null
)

val nestedData = hashMapOf(
        "a" to 5,
        "b" to true
)

docData["objectExample"] = nestedData

db.collection("data").document("one")
        .set(docData)
        .addOnSuccessListener { Log.d(TAG, "DocumentSnapshot successfully written!") }
        .addOnFailureListener { e -> Log.w(TAG, "Error writing document", e) }
DocSnippets.kt

Dart

final docData = {
  "stringExample": "Hello world!",
  "booleanExample": true,
  "numberExample": 3.14159265,
  "dateExample": Timestamp.now(),
  "listExample": [1, 2, 3],
  "nullExample": null
};

final nestedData = {
  "a": 5,
  "b": true,
};

docData["objectExample"] = nestedData;

db
    .collection("data")
    .doc("one")
    .set(docData)
    .onError((e, _) => print("Error writing document: $e"));
firestore.dart
जावा
Map<String, Object> docData = new HashMap<>();
docData.put("stringExample", "Hello, World");
docData.put("booleanExample", false);
docData.put("numberExample", 3.14159265);
docData.put("nullExample", null);

ArrayList<Object> arrayExample = new ArrayList<>();
Collections.addAll(arrayExample, 5L, true, "hello");
docData.put("arrayExample", arrayExample);

Map<String, Object> objectExample = new HashMap<>();
objectExample.put("a", 5L);
objectExample.put("b", true);

docData.put("objectExample", objectExample);

ApiFuture<WriteResult> future = db.collection("data").document("one").set(docData);
System.out.println("Update time : " + future.get().getUpdateTime());
ManageDataSnippets.java
अजगर
data = {
    u'stringExample': u'Hello, World!',
    u'booleanExample': True,
    u'numberExample': 3.14159265,
    u'dateExample': datetime.datetime.now(tz=datetime.timezone.utc),
    u'arrayExample': [5, True, u'hello'],
    u'nullExample': None,
    u'objectExample': {
        u'a': 5,
        u'b': True
    }
}

db.collection(u'data').document(u'one').set(data)
snippets.py

Python

data = {
    "stringExample": "Hello, World!",
    "booleanExample": True,
    "numberExample": 3.14159265,
    "dateExample": datetime.datetime.now(tz=datetime.timezone.utc),
    "arrayExample": [5, True, "hello"],
    "nullExample": None,
    "objectExample": {"a": 5, "b": True},
}

await db.collection("data").document("one").set(data)
snippets.py
सी++
MapFieldValue doc_data{
    {"stringExample", FieldValue::String("Hello world!")},
    {"booleanExample", FieldValue::Boolean(true)},
    {"numberExample", FieldValue::Double(3.14159265)},
    {"dateExample", FieldValue::Timestamp(Timestamp::Now())},
    {"arrayExample", FieldValue::Array({FieldValue::Integer(1),
                                        FieldValue::Integer(2),
                                        FieldValue::Integer(3)})},
    {"nullExample", FieldValue::Null()},
    {"objectExample",
     FieldValue::Map(
         {{"a", FieldValue::Integer(5)},
          {"b", FieldValue::Map(
                    {{"nested", FieldValue::String("foo")}})}})},
};

db->Collection("data").Document("one").Set(doc_data).OnCompletion(
    [](const Future<void>& future) {
      if (future.error() == Error::kErrorOk) {
        std::cout << "DocumentSnapshot successfully written!" << std::endl;
      } else {
        std::cout << "Error writing document: " << future.error_message()
                  << std::endl;
      }
    });
snippets.cpp
Node.js
const data = {
  stringExample: 'Hello, World!',
  booleanExample: true,
  numberExample: 3.14159265,
  dateExample: Timestamp.fromDate(new Date('December 10, 1815')),
  arrayExample: [5, true, 'hello'],
  nullExample: null,
  objectExample: {
    a: 5,
    b: true
  }
};

const res = await db.collection('data').doc('one').set(data);
index.js
जाओ
doc := make(map[string]interface{})
doc["stringExample"] = "Hello world!"
doc["booleanExample"] = true
doc["numberExample"] = 3.14159265
doc["dateExample"] = time.Now()
doc["arrayExample"] = []interface{}{5, true, "hello"}
doc["nullExample"] = nil
doc["objectExample"] = map[string]interface{}{
	"a": 5,
	"b": true,
}

_, err := client.Collection("data").Doc("one").Set(ctx, doc)
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
$data = [
    'stringExample' => 'Hello World',
    'booleanExample' => true,
    'numberExample' => 3.14159265,
    'dateExample' => new Timestamp(new DateTime()),
    'arrayExample' => array(5, true, 'hello'),
    'nullExample' => null,
    'objectExample' => ['a' => 5, 'b' => true],
    'documentReferenceExample' => $db->collection('samples/php/data')->document('two'),
];
$db->collection('samples/php/data')->document('one')->set($data);
printf('Set multiple data-type data for the one document in the data collection.' . PHP_EOL);
data_set_from_map_nested.php
एकता
DocumentReference docRef = db.Collection("data").Document("one");
Dictionary<string, object> docData = new Dictionary<string, object>
{
	{ "stringExample", "Hello World" },
	{ "booleanExample", false },
	{ "numberExample", 3.14159265 },
	{ "nullExample", null },
	{ "arrayExample", new List<object>() { 5, true, "Hello" } },
	{ "objectExample", new Dictionary<string, object>
		{
			{ "a", 5 },
			{ "b", true },
		}
	},
};

docRef.SetAsync(docData);
सी#
DocumentReference docRef = db.Collection("data").Document("one");
Dictionary<string, object> docData = new Dictionary<string, object>
{
    { "stringExample", "Hello World" },
    { "booleanExample", false },
    { "numberExample", 3.14159265 },
    { "nullExample", null },
};

ArrayList arrayExample = new ArrayList();
arrayExample.Add(5);
arrayExample.Add(true);
arrayExample.Add("Hello");
docData.Add("arrayExample", arrayExample);

Dictionary<string, object> objectExample = new Dictionary<string, object>
{
    { "a", 5 },
    { "b", true },
};
docData.Add("objectExample", objectExample);

await docRef.SetAsync(docData);
Program.cs
माणिक
doc_ref = firestore.doc "#{collection_path}/one"

data = {
  stringExample:  "Hello, World!",
  booleanExample: true,
  numberExample:  3.14159265,
  dateExample:    DateTime.now,
  arrayExample:   [5, true, "hello"],
  nullExample:    nil,
  objectExample:  {
    a: 5,
    b: true
  }
}

doc_ref.set data
add_data.rb

कस्टम ऑब्जेक्ट

अपने दस्तावेज़ों का प्रतिनिधित्व करने के लिए Map या Dictionary वस्तुओं का उपयोग करना अक्सर बहुत सुविधाजनक नहीं होता है, इसलिए क्लाउड फायरस्टोर कस्टम कक्षाओं के साथ दस्तावेज़ लिखने का समर्थन करता है। Cloud Firestore ऑब्जेक्ट को समर्थित डेटा प्रकारों में कनवर्ट करता है।

कस्टम कक्षाओं का उपयोग करके, आप दिखाए गए प्रारंभिक उदाहरण को फिर से लिख सकते हैं:

Web version 9

class City {
    constructor (name, state, country ) {
        this.name = name;
        this.state = state;
        this.country = country;
    }
    toString() {
        return this.name + ', ' + this.state + ', ' + this.country;
    }
}

// Firestore data converter
const cityConverter = {
    toFirestore: (city) => {
        return {
            name: city.name,
            state: city.state,
            country: city.country
            };
    },
    fromFirestore: (snapshot, options) => {
        const data = snapshot.data(options);
        return new City(data.name, data.state, data.country);
    }
};
city_custom_object.js

Web version 8

class City {
    constructor (name, state, country ) {
        this.name = name;
        this.state = state;
        this.country = country;
    }
    toString() {
        return this.name + ', ' + this.state + ', ' + this.country;
    }
}

// Firestore data converter
var cityConverter = {
    toFirestore: function(city) {
        return {
            name: city.name,
            state: city.state,
            country: city.country
            };
    },
    fromFirestore: function(snapshot, options){
        const data = snapshot.data(options);
        return new City(data.name, data.state, data.country);
    }
};
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
public struct City: Codable {

    let name: String
    let state: String?
    let country: String?
    let isCapital: Bool?
    let population: Int64?

    enum CodingKeys: String, CodingKey {
        case name
        case state
        case country
        case isCapital = "capital"
        case population
    }

}
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// This isn't supported in Objective-C.

Java

प्रत्येक कस्टम वर्ग में एक सार्वजनिक निर्माता होना चाहिए जो कोई तर्क नहीं लेता है। इसके अलावा, कक्षा में प्रत्येक संपत्ति के लिए एक सार्वजनिक प्राप्तकर्ता शामिल होना चाहिए।

public class City {


    private String name;
    private String state;
    private String country;
    private boolean capital;
    private long population;
    private List<String> regions;

    public City() {}

    public City(String name, String state, String country, boolean capital, long population, List<String> regions) {
        // ...
    }

    public String getName() {
        return name;
    }

    public String getState() {
        return state;
    }

    public String getCountry() {
        return country;
    }

    public boolean isCapital() {
        return capital;
    }

    public long getPopulation() {
        return population;
    }

    public List<String> getRegions() {
        return regions;
    }

}
DocSnippets.java

Kotlin+KTX

data class City(
    val name: String? = null,
    val state: String? = null,
    val country: String? = null,
    @field:JvmField // use this annotation if your Boolean field is prefixed with 'is'
    val isCapital: Boolean? = null,
    val population: Long? = null,
    val regions: List<String>? = null
)
DocSnippets.kt

Dart

class City {
  final String? name;
  final String? state;
  final String? country;
  final bool? capital;
  final int? population;
  final List<String>? regions;

  City({
    this.name,
    this.state,
    this.country,
    this.capital,
    this.population,
    this.regions,
  });

  factory City.fromFirestore(
    DocumentSnapshot<Map<String, dynamic>> snapshot,
    SnapshotOptions? options,
  ) {
    final data = snapshot.data();
    return City(
      name: data?['name'],
      state: data?['state'],
      country: data?['country'],
      capital: data?['capital'],
      population: data?['population'],
      regions:
          data?['regions'] is Iterable ? List.from(data?['regions']) : null,
    );
  }

  Map<String, dynamic> toFirestore() {
    return {
      if (name != null) "name": name,
      if (state != null) "state": state,
      if (country != null) "country": country,
      if (capital != null) "capital": capital,
      if (population != null) "population": population,
      if (regions != null) "regions": regions,
    };
  }
}
firestore_add_data_custom_objects_snippet.dart
जावा
public City() {
  // Must have a public no-argument constructor
}

// Initialize all fields of a city
public City(
    String name,
    String state,
    String country,
    Boolean capital,
    Long population,
    List<String> regions) {
  this.name = name;
  this.state = state;
  this.country = country;
  this.capital = capital;
  this.population = population;
  this.regions = regions;
}
City.java
अजगर
class City(object):
    def __init__(self, name, state, country, capital=False, population=0,
                 regions=[]):
        self.name = name
        self.state = state
        self.country = country
        self.capital = capital
        self.population = population
        self.regions = regions

    @staticmethod
    def from_dict(source):
        # ...

    def to_dict(self):
        # ...

    def __repr__(self):
        return(
            f'City(\
                name={self.name}, \
                country={self.country}, \
                population={self.population}, \
                capital={self.capital}, \
                regions={self.regions}\
            )'
        )
snippets.py

Python

class City(object):
    def __init__(self, name, state, country, capital=False, population=0, regions=[]):
        self.name = name
        self.state = state
        self.country = country
        self.capital = capital
        self.population = population
        self.regions = regions

    @staticmethod
    def from_dict(source):
        # ...

    def to_dict(self):
        # ...

    def __repr__(self):
        return f"City(\
                name={self.name}, \
                country={self.country}, \
                population={self.population}, \
                capital={self.capital}, \
                regions={self.regions}\
            )"

snippets.py
सी++
// This is not yet supported.
Node.js
// Node.js uses JavaScript objects
जाओ

// City represents a city.
type City struct {
	Name       string   `firestore:"name,omitempty"`
	State      string   `firestore:"state,omitempty"`
	Country    string   `firestore:"country,omitempty"`
	Capital    bool     `firestore:"capital,omitempty"`
	Population int64    `firestore:"population,omitempty"`
	Regions    []string `firestore:"regions,omitempty"`
}

custom_type_definition.go
पीएचपी
// This isn't supported in PHP
एकता
[FirestoreData]
public class City
{
	[FirestoreProperty]
	public string Name { get; set; }

	[FirestoreProperty]
	public string State { get; set; }

	[FirestoreProperty]
	public string Country { get; set; }

	[FirestoreProperty]
	public bool Capital { get; set; }

	[FirestoreProperty]
	public long Population { get; set; }
}
सी#
[FirestoreData]
public class City
{
    [FirestoreProperty]
    public string Name { get; set; }

    [FirestoreProperty]
    public string State { get; set; }

    [FirestoreProperty]
    public string Country { get; set; }

    [FirestoreProperty]
    public bool Capital { get; set; }

    [FirestoreProperty]
    public long Population { get; set; }
}
Program.cs
माणिक
// This isn't supported in Ruby

Web version 9

import { doc, setDoc } from "firebase/firestore"; 

// Set with cityConverter
const ref = doc(db, "cities", "LA").withConverter(cityConverter);
await setDoc(ref, new City("Los Angeles", "CA", "USA"));
set_custom_object.js

Web version 8

// Set with cityConverter
db.collection("cities").doc("LA")
  .withConverter(cityConverter)
  .set(new City("Los Angeles", "CA", "USA"));
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
let city = City(name: "Los Angeles",
                state: "CA",
                country: "USA",
                isCapital: false,
                population: 5000000)

do {
    try db.collection("cities").document("LA").setData(from: city)
} catch let error {
    print("Error writing city to Firestore: \(error)")
}
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// This isn't supported in Objective-C.

Java

City city = new City("Los Angeles", "CA", "USA",
        false, 5000000L, Arrays.asList("west_coast", "sorcal"));
db.collection("cities").document("LA").set(city);
DocSnippets.java

Kotlin+KTX

val city = City("Los Angeles", "CA", "USA",
        false, 5000000L, listOf("west_coast", "socal"))
db.collection("cities").document("LA").set(city)
DocSnippets.kt

Dart

final city = City(
  name: "Los Angeles",
  state: "CA",
  country: "USA",
  capital: false,
  population: 5000000,
  regions: ["west_coast", "socal"],
);
final docRef = db
    .collection("cities")
    .withConverter(
      fromFirestore: City.fromFirestore,
      toFirestore: (City city, options) => city.toFirestore(),
    )
    .doc("LA");
await docRef.set(city);
firestore.dart
जावा
City city =
    new City("Los Angeles", "CA", "USA", false, 3900000L, Arrays.asList("west_coast", "socal"));
ApiFuture<WriteResult> future = db.collection("cities").document("LA").set(city);
// block on response if required
System.out.println("Update time : " + future.get().getUpdateTime());
ManageDataSnippets.java
अजगर
city = City(name=u'Los Angeles', state=u'CA', country=u'USA')
db.collection(u'cities').document(u'LA').set(city.to_dict())
snippets.py

Python

city = City(name="Los Angeles", state="CA", country="USA")
await db.collection("cities").document("LA").set(city.to_dict())
snippets.py
सी++
// This is not yet supported.
Node.js
// Node.js uses JavaScript objects
जाओ
city := City{
	Name:    "Los Angeles",
	Country: "USA",
}
_, err := client.Collection("cities").Doc("LA").Set(ctx, city)
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
// This isn't supported in PHP.
एकता
DocumentReference docRef = db.Collection("cities").Document("LA");
City city = new City
{
	Name = "Los Angeles",
	State = "CA",
	Country = "USA",
	Capital = false,
	Population = 3900000L
};
docRef.SetAsync(city);
सी#
DocumentReference docRef = db.Collection("cities").Document("LA");
City city = new City
{
    Name = "Los Angeles",
    State = "CA",
    Country = "USA",
    Capital = false,
    Population = 3900000L
};
await docRef.SetAsync(city);
Program.cs
माणिक
// This isn't supported in Ruby.

एक दस्तावेज़ जोड़ें

जब आप दस्तावेज़ बनाने के लिए set() का उपयोग करते हैं, तो आपको दस्तावेज़ बनाने के लिए एक आईडी निर्दिष्ट करनी होगी। उदाहरण के लिए:

Web version 9

import { doc, setDoc } from "firebase/firestore"; 

await setDoc(doc(db, "cities", "new-city-id"), data);
cities_document_set.js

Web version 8

db.collection("cities").doc("new-city-id").set(data);
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
db.collection("cities").document("new-city-id").setData(data)
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
[[[self.db collectionWithPath:@"cities"] documentWithPath:@"new-city-id"]
    setData:data];
ViewController.m

Java

db.collection("cities").document("new-city-id").set(data);
DocSnippets.java

Kotlin+KTX

db.collection("cities").document("new-city-id").set(data)
DocSnippets.kt

Dart

db.collection("cities").doc("new-city-id").set({"name": "Chicago"});
firestore.dart
जावा
db.collection("cities").document("new-city-id").set(data);
ManageDataSnippets.java
अजगर
db.collection(u'cities').document(u'new-city-id').set(data)
snippets.py

Python

await db.collection("cities").document("new-city-id").set(data)
snippets.py
सी++
db->Collection("cities").Document("SF").Set({/*some data*/});
snippets.cpp
Node.js
await db.collection('cities').doc('new-city-id').set(data);
index.js
जाओ
_, err := client.Collection("cities").Doc("new-city-id").Set(ctx, data)
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
$db->collection('samples/php/cities')->document('new-city-id')->set($data);
data_set_id_specified.php
एकता
db.Collection("cities").Document("new-city-id").SetAsync(city);
सी#
await db.Collection("cities").Document("new-city-id").SetAsync(city);
Program.cs
माणिक
city_ref = firestore.doc "#{collection_path}/new-city-id"
city_ref.set data
add_data.rb

लेकिन कभी-कभी दस्तावेज़ के लिए कोई सार्थक आईडी नहीं होती है, और क्लाउड फायरस्टोर को आपके लिए एक आईडी स्वतः उत्पन्न करने देना अधिक सुविधाजनक होता है। आप add() को कॉल करके ऐसा कर सकते हैं:

Web version 9

import { collection, addDoc } from "firebase/firestore"; 

// Add a new document with a generated id.
const docRef = await addDoc(collection(db, "cities"), {
  name: "Tokyo",
  country: "Japan"
});
console.log("Document written with ID: ", docRef.id);
add_document.js

Web version 8

// Add a new document with a generated id.
db.collection("cities").add({
    name: "Tokyo",
    country: "Japan"
})
.then((docRef) => {
    console.log("Document written with ID: ", docRef.id);
})
.catch((error) => {
    console.error("Error adding document: ", error);
});
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// Add a new document with a generated id.
var ref: DocumentReference? = nil
ref = db.collection("cities").addDocument(data: [
    "name": "Tokyo",
    "country": "Japan"
]) { err in
    if let err = err {
        print("Error adding document: \(err)")
    } else {
        print("Document added with ID: \(ref!.documentID)")
    }
}
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// Add a new document with a generated id.
__block FIRDocumentReference *ref =
    [[self.db collectionWithPath:@"cities"] addDocumentWithData:@{
      @"name": @"Tokyo",
      @"country": @"Japan"
    } completion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error adding document: %@", error);
      } else {
        NSLog(@"Document added with ID: %@", ref.documentID);
      }
    }];
ViewController.m

Java

// Add a new document with a generated id.
Map<String, Object> data = new HashMap<>();
data.put("name", "Tokyo");
data.put("country", "Japan");

db.collection("cities")
        .add(data)
        .addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
            @Override
            public void onSuccess(DocumentReference documentReference) {
                Log.d(TAG, "DocumentSnapshot written with ID: " + documentReference.getId());
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "Error adding document", e);
            }
        });
DocSnippets.java

Kotlin+KTX

// Add a new document with a generated id.
val data = hashMapOf(
        "name" to "Tokyo",
        "country" to "Japan"
)

db.collection("cities")
    .add(data)
    .addOnSuccessListener { documentReference ->
        Log.d(TAG, "DocumentSnapshot written with ID: ${documentReference.id}")
    }
    .addOnFailureListener { e ->
        Log.w(TAG, "Error adding document", e)
    }
DocSnippets.kt

Dart

// Add a new document with a generated id.
final data = {"name": "Tokyo", "country": "Japan"};

db.collection("cities").add(data).then((documentSnapshot) =>
    print("Added Data with ID: ${documentSnapshot.id}"));
firestore.dart
जावा
// Add document data with auto-generated id.
Map<String, Object> data = new HashMap<>();
data.put("name", "Tokyo");
data.put("country", "Japan");
ApiFuture<DocumentReference> addedDocRef = db.collection("cities").add(data);
System.out.println("Added document with ID: " + addedDocRef.get().getId());
ManageDataSnippets.java
अजगर
city = City(name=u'Tokyo', state=None, country=u'Japan')
db.collection(u'cities').add(city.to_dict())
snippets.py

Python

city = City(name="Tokyo", state=None, country="Japan")
await db.collection("cities").add(city.to_dict())
snippets.py
सी++
db->Collection("cities").Add({/*some data*/});
snippets.cpp
Node.js
// Add a new document with a generated id.
const res = await db.collection('cities').add({
  name: 'Tokyo',
  country: 'Japan'
});

console.log('Added document with ID: ', res.id);
index.js
जाओ
_, _, err := client.Collection("cities").Add(ctx, map[string]interface{}{
	"name":    "Tokyo",
	"country": "Japan",
})
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
$data = [
    'name' => 'Tokyo',
    'country' => 'Japan'
];
$addedDocRef = $db->collection('samples/php/cities')->add($data);
printf('Added document with ID: %s' . PHP_EOL, $addedDocRef->id());
data_set_id_random_collection.php
एकता
Dictionary<string, object> city = new Dictionary<string, object>
{
	{ "Name", "Tokyo" },
	{ "Country", "Japan" }
};
db.Collection("cities").AddAsync(city).ContinueWithOnMainThread(task => {
	DocumentReference addedDocRef = task.Result;
	Debug.Log(String.Format("Added document with ID: {0}.", addedDocRef.Id));
});
सी#
Dictionary<string, object> city = new Dictionary<string, object>
{
    { "Name", "Tokyo" },
    { "Country", "Japan" }
};
DocumentReference addedDocRef = await db.Collection("cities").AddAsync(city);
Console.WriteLine("Added document with ID: {0}.", addedDocRef.Id);
Program.cs
माणिक
data = {
  name:    "Tokyo",
  country: "Japan"
}

cities_ref = firestore.col collection_path

added_doc_ref = cities_ref.add data
puts "Added document with ID: #{added_doc_ref.document_id}."
add_data.rb

कुछ मामलों में, ऑटो-जेनरेटेड आईडी के साथ दस्तावेज़ संदर्भ बनाना उपयोगी हो सकता है, फिर बाद में संदर्भ का उपयोग करें। इस उपयोग के मामले के लिए, आप doc() पर कॉल कर सकते हैं:

Web version 9

import { collection, doc, setDoc } from "firebase/firestore"; 

// Add a new document with a generated id
const newCityRef = doc(collection(db, "cities"));

// later...
await setDoc(newCityRef, data);
new_document.js

Web version 8

// Add a new document with a generated id.
var newCityRef = db.collection("cities").doc();

// later...
newCityRef.set(data);
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
let newCityRef = db.collection("cities").document()

// later...
newCityRef.setData([
    // ...
])
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
FIRDocumentReference *newCityRef = [[self.db collectionWithPath:@"cities"] documentWithAutoID];
// later...
[newCityRef setData:@{ /* ... */ }];
ViewController.m

Java

Map<String, Object> data = new HashMap<>();

DocumentReference newCityRef = db.collection("cities").document();

// Later...
newCityRef.set(data);
DocSnippets.java

Kotlin+KTX

val data = HashMap<String, Any>()

val newCityRef = db.collection("cities").document()

// Later...
newCityRef.set(data)
DocSnippets.kt

Dart

// Add a new document with a generated id.
final data = <String, dynamic>{};

final newCityRef = db.collection("cities").doc();

// Later...
newCityRef.set(data);

firestore.dart
जावा
// Add document data after generating an id.
DocumentReference addedDocRef = db.collection("cities").document();
System.out.println("Added document with ID: " + addedDocRef.getId());

// later...
ApiFuture<WriteResult> writeResult = addedDocRef.set(data);
ManageDataSnippets.java
अजगर
new_city_ref = db.collection(u'cities').document()

# later...
new_city_ref.set({
    # ...
})
snippets.py

Python

new_city_ref = db.collection("cities").document()

# later...
await new_city_ref.set(
    {
        # ...
    }
)
snippets.py
सी++
DocumentReference new_city_ref = db->Collection("cities").Document();
snippets.cpp
Node.js
const newCityRef = db.collection('cities').doc();

// Later...
const res = await newCityRef.set({
  // ...
});
index.js
जाओ
ref := client.Collection("cities").NewDoc()

// later...
_, err := ref.Set(ctx, data)
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
$addedDocRef = $db->collection('samples/php/cities')->newDocument();
printf('Added document with ID: %s' . PHP_EOL, $addedDocRef->id());
$addedDocRef->set($data);
data_set_id_random_document_ref.php
एकता
DocumentReference addedDocRef = db.Collection("cities").Document();
Debug.Log(String.Format("Added document with ID: {0}.", addedDocRef.Id));
addedDocRef.SetAsync(city).ContinueWithOnMainThread(task => {
	Debug.Log(String.Format(
		"Added data to the {0} document in the cities collection.", addedDocRef.Id));
});
सी#
DocumentReference addedDocRef = db.Collection("cities").Document();
Console.WriteLine("Added document with ID: {0}.", addedDocRef.Id);
await addedDocRef.SetAsync(city);
Program.cs
माणिक
cities_ref = firestore.col collection_path

added_doc_ref = cities_ref.doc
puts "Added document with ID: #{added_doc_ref.document_id}."

added_doc_ref.set data
add_data.rb

परदे के पीछे, .add(...) और .doc().set(...) पूरी तरह से समकक्ष हैं, इसलिए आप जो भी अधिक सुविधाजनक हो उसका उपयोग कर सकते हैं।

एक दस्तावेज़ अपडेट करें

संपूर्ण दस्तावेज़ को अधिलेखित किए बिना किसी दस्तावेज़ के कुछ क्षेत्रों को अद्यतन करने के लिए, update() विधि का उपयोग करें:

Web version 9

import { doc, updateDoc } from "firebase/firestore";

const washingtonRef = doc(db, "cities", "DC");

// Set the "capital" field of the city 'DC'
await updateDoc(washingtonRef, {
  capital: true
});
update_document.js

Web version 8

var washingtonRef = db.collection("cities").doc("DC");

// Set the "capital" field of the city 'DC'
return washingtonRef.update({
    capital: true
})
.then(() => {
    console.log("Document successfully updated!");
})
.catch((error) => {
    // The document probably doesn't exist.
    console.error("Error updating document: ", error);
});
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
let washingtonRef = db.collection("cities").document("DC")

// Set the "capital" field of the city 'DC'
washingtonRef.updateData([
    "capital": true
]) { err in
    if let err = err {
        print("Error updating document: \(err)")
    } else {
        print("Document successfully updated")
    }
}
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
FIRDocumentReference *washingtonRef =
    [[self.db collectionWithPath:@"cities"] documentWithPath:@"DC"];
// Set the "capital" field of the city
[washingtonRef updateData:@{
  @"capital": @YES
} completion:^(NSError * _Nullable error) {
  if (error != nil) {
    NSLog(@"Error updating document: %@", error);
  } else {
    NSLog(@"Document successfully updated");
  }
}];
ViewController.m

Java

DocumentReference washingtonRef = db.collection("cities").document("DC");

// Set the "isCapital" field of the city 'DC'
washingtonRef
        .update("capital", true)
        .addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {
                Log.d(TAG, "DocumentSnapshot successfully updated!");
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "Error updating document", e);
            }
        });
DocSnippets.java

Kotlin+KTX

val washingtonRef = db.collection("cities").document("DC")

// Set the "isCapital" field of the city 'DC'
washingtonRef
        .update("capital", true)
        .addOnSuccessListener { Log.d(TAG, "DocumentSnapshot successfully updated!") }
        .addOnFailureListener { e -> Log.w(TAG, "Error updating document", e) }
DocSnippets.kt

Dart

final washingtonRef = db.collection("cites").doc("DC");
washingtonRef.update({"capital": true}).then(
    (value) => print("DocumentSnapshot successfully updated!"),
    onError: (e) => print("Error updating document $e"));
firestore.dart
जावा
// Update an existing document
DocumentReference docRef = db.collection("cities").document("DC");

// (async) Update one field
ApiFuture<WriteResult> future = docRef.update("capital", true);

// ...
WriteResult result = future.get();
System.out.println("Write result: " + result);
ManageDataSnippets.java
अजगर
city_ref = db.collection(u'cities').document(u'DC')

# Set the capital field
city_ref.update({u'capital': True})
snippets.py

Python

city_ref = db.collection("cities").document("DC")

# Set the capital field
await city_ref.update({"capital": True})
snippets.py
सी++
DocumentReference washington_ref = db->Collection("cities").Document("DC");
// Set the "capital" field of the city "DC".
washington_ref.Update({{"capital", FieldValue::Boolean(true)}});
snippets.cpp
Node.js
const cityRef = db.collection('cities').doc('DC');

// Set the 'capital' field of the city
const res = await cityRef.update({capital: true});
index.js
जाओ
_, err = client.Collection("cities").Doc("DC").Update(ctx, []firestore.Update{
	{
		Path:  "capital",
		Value: true,
	},
})
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
$cityRef = $db->collection('samples/php/cities')->document('DC');
$cityRef->update([
    ['path' => 'capital', 'value' => true]
]);
data_set_field.php
एकता
DocumentReference cityRef = db.Collection("cities").Document("new-city-id");
Dictionary<string, object> updates = new Dictionary<string, object>
{
	{ "Capital", false }
};

cityRef.UpdateAsync(updates).ContinueWithOnMainThread(task => {
	Debug.Log(
		"Updated the Capital field of the new-city-id document in the cities collection.");
});
// You can also update a single field with: cityRef.UpdateAsync("Capital", false);
सी#
DocumentReference cityRef = db.Collection("cities").Document("new-city-id");
Dictionary<string, object> updates = new Dictionary<string, object>
{
    { "Capital", false }
};
await cityRef.UpdateAsync(updates);

// You can also update a single field with: await cityRef.UpdateAsync("Capital", false);
Program.cs
माणिक
city_ref = firestore.doc "#{collection_path}/DC"
city_ref.update({ capital: true })
add_data.rb

सर्वर टाइमस्टैम्प

आप अपने दस्तावेज़ में एक सर्वर टाइमस्टैम्प पर एक फ़ील्ड सेट कर सकते हैं जो सर्वर को अपडेट प्राप्त होने पर ट्रैक करता है।

Web version 9

import { updateDoc, serverTimestamp } from "firebase/firestore";

const docRef = doc(db, 'objects', 'some-id');

// Update the timestamp field with the value from the server
const updateTimestamp = await updateDoc(docRef, {
    timestamp: serverTimestamp()
});
update_with_server_timestamp.js

Web version 8

var docRef = db.collection('objects').doc('some-id');

// Update the timestamp field with the value from the server
var updateTimestamp = docRef.update({
    timestamp: firebase.firestore.FieldValue.serverTimestamp()
});
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
db.collection("objects").document("some-id").updateData([
    "lastUpdated": FieldValue.serverTimestamp(),
]) { err in
    if let err = err {
        print("Error updating document: \(err)")
    } else {
        print("Document successfully updated")
    }
}
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
[[[self.db collectionWithPath:@"objects"] documentWithPath:@"some-id"] updateData:@{
  @"lastUpdated": [FIRFieldValue fieldValueForServerTimestamp]
} completion:^(NSError * _Nullable error) {
  if (error != nil) {
    NSLog(@"Error updating document: %@", error);
  } else {
    NSLog(@"Document successfully updated");
  }
}];
ViewController.m

Java

// If you're using custom Java objects in Android, add an @ServerTimestamp
// annotation to a Date field for your custom object classes. This indicates
// that the Date field should be treated as a server timestamp by the object mapper.
DocumentReference docRef = db.collection("objects").document("some-id");

// Update the timestamp field with the value from the server
Map<String,Object> updates = new HashMap<>();
updates.put("timestamp", FieldValue.serverTimestamp());

docRef.update(updates).addOnCompleteListener(new OnCompleteListener<Void>() {
    // ...
    // ...
DocSnippets.java

Kotlin+KTX

// If you're using custom Kotlin objects in Android, add an @ServerTimestamp
// annotation to a Date field for your custom object classes. This indicates
// that the Date field should be treated as a server timestamp by the object mapper.
val docRef = db.collection("objects").document("some-id")

// Update the timestamp field with the value from the server
val updates = hashMapOf<String, Any>(
        "timestamp" to FieldValue.serverTimestamp()
)

docRef.update(updates).addOnCompleteListener { }
DocSnippets.kt

Dart

final docRef = db.collection("objects").doc("some-id");
final updates = <String, dynamic>{
  "timestamp": FieldValue.serverTimestamp(),
};

docRef.update(updates).then(
    (value) => print("DocumentSnapshot successfully updated!"),
    onError: (e) => print("Error updating document $e"));
firestore.dart
जावा
DocumentReference docRef = db.collection("objects").document("some-id");
// Update the timestamp field with the value from the server
ApiFuture<WriteResult> writeResult = docRef.update("timestamp", FieldValue.serverTimestamp());
System.out.println("Update time : " + writeResult.get());
ManageDataSnippets.java
अजगर
city_ref = db.collection(u'objects').document(u'some-id')
city_ref.update({
    u'timestamp': firestore.SERVER_TIMESTAMP
})
snippets.py

Python

city_ref = db.collection("objects").document("some-id")
await city_ref.update({"timestamp": firestore.SERVER_TIMESTAMP})
snippets.py
सी++
DocumentReference doc_ref = db->Collection("objects").Document("some-id");
doc_ref.Update({{"timestamp", FieldValue::ServerTimestamp()}})
    .OnCompletion([](const Future<void>& future) {
      // ...
    });
snippets.cpp
Node.js
// Create a document reference
const docRef = db.collection('objects').doc('some-id');

// Update the timestamp field with the value from the server
const res = await docRef.update({
  timestamp: FieldValue.serverTimestamp()
});
index.js
जाओ
_, err := client.Collection("objects").Doc("some-id").Set(ctx, map[string]interface{}{
	"timestamp": firestore.ServerTimestamp,
}, firestore.MergeAll)
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
$docRef = $db->collection('samples/php/objects')->document('some-id');
$docRef->update([
    ['path' => 'timestamp', 'value' => FieldValue::serverTimestamp()]
]);
data_set_server_timestamp.php
एकता
DocumentReference cityRef = db.Collection("cities").Document("new-city-id");
cityRef.UpdateAsync("Timestamp", FieldValue.ServerTimestamp)
	.ContinueWithOnMainThread(task => {
		Debug.Log(
			"Updated the Timestamp field of the new-city-id document in the cities "
			+ "collection.");
	});
सी#
DocumentReference cityRef = db.Collection("cities").Document("new-city-id");
await cityRef.UpdateAsync("Timestamp", Timestamp.GetCurrentTimestamp());
Program.cs
माणिक
city_ref = firestore.doc "#{collection_path}/new-city-id"
city_ref.update({ timestamp: firestore.field_server_time })
add_data.rb

लेन-देन के अंदर कई टाइमस्टैम्प फ़ील्ड अपडेट करते समय, प्रत्येक फ़ील्ड को समान सर्वर टाइमस्टैम्प मान प्राप्त होता है।

नेस्टेड ऑब्जेक्ट में फ़ील्ड अपडेट करें

यदि आपके दस्तावेज़ में नेस्टेड ऑब्जेक्ट हैं, तो आप update() कॉल करते समय दस्तावेज़ के भीतर नेस्टेड फ़ील्ड को संदर्भित करने के लिए "डॉट नोटेशन" का उपयोग कर सकते हैं:

Web version 9

import { doc, setDoc, updateDoc } from "firebase/firestore"; 

// Create an initial document to update.
const frankDocRef = doc(db, "users", "frank");
await setDoc(frankDocRef, {
    name: "Frank",
    favorites: { food: "Pizza", color: "Blue", subject: "recess" },
    age: 12
});

// To update age and favorite color:
await updateDoc(frankDocRef, {
    "age": 13,
    "favorites.color": "Red"
});
update_document_nested.js

Web version 8

// Create an initial document to update.
var frankDocRef = db.collection("users").doc("frank");
frankDocRef.set({
    name: "Frank",
    favorites: { food: "Pizza", color: "Blue", subject: "recess" },
    age: 12
});

// To update age and favorite color:
db.collection("users").doc("frank").update({
    "age": 13,
    "favorites.color": "Red"
})
.then(() => {
    console.log("Document successfully updated!");
});
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// Create an initial document to update.
let frankDocRef = db.collection("users").document("frank")
frankDocRef.setData([
    "name": "Frank",
    "favorites": [ "food": "Pizza", "color": "Blue", "subject": "recess" ],
    "age": 12
    ])

// To update age and favorite color:
db.collection("users").document("frank").updateData([
    "age": 13,
    "favorites.color": "Red"
]) { err in
    if let err = err {
        print("Error updating document: \(err)")
    } else {
        print("Document successfully updated")
    }
}
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
// Create an initial document to update.
FIRDocumentReference *frankDocRef =
    [[self.db collectionWithPath:@"users"] documentWithPath:@"frank"];
[frankDocRef setData:@{
  @"name": @"Frank",
  @"favorites": @{
    @"food": @"Pizza",
    @"color": @"Blue",
    @"subject": @"recess"
  },
  @"age": @12
}];
// To update age and favorite color:
[frankDocRef updateData:@{
  @"age": @13,
  @"favorites.color": @"Red",
} completion:^(NSError * _Nullable error) {
  if (error != nil) {
    NSLog(@"Error updating document: %@", error);
  } else {
    NSLog(@"Document successfully updated");
  }
}];
ViewController.m

Java

// Assume the document contains:
// {
//   name: "Frank",
//   favorites: { food: "Pizza", color: "Blue", subject: "recess" }
//   age: 12
// }
//
// To update age and favorite color:
db.collection("users").document("frank")
        .update(
                "age", 13,
                "favorites.color", "Red"
        );
DocSnippets.java

Kotlin+KTX

// Assume the document contains:
// {
//   name: "Frank",
//   favorites: { food: "Pizza", color: "Blue", subject: "recess" }
//   age: 12
// }
//
// To update age and favorite color:
db.collection("users").document("frank")
        .update(mapOf(
                "age" to 13,
                "favorites.color" to "Red"
        ))
DocSnippets.kt

Dart

// Assume the document contains:
// {
//   name: "Frank",
//   favorites: { food: "Pizza", color: "Blue", subject: "recess" }
//   age: 12
// }
db
    .collection("users")
    .doc("frank")
    .update({"age": 13, "favorites.color": "Red"});
firestore.dart
जावा
// Create an initial document to update
DocumentReference frankDocRef = db.collection("users").document("frank");
Map<String, Object> initialData = new HashMap<>();
initialData.put("name", "Frank");
initialData.put("age", 12);

Map<String, Object> favorites = new HashMap<>();
favorites.put("food", "Pizza");
favorites.put("color", "Blue");
favorites.put("subject", "Recess");
initialData.put("favorites", favorites);

ApiFuture<WriteResult> initialResult = frankDocRef.set(initialData);
// Confirm that data has been successfully saved by blocking on the operation
initialResult.get();

// Update age and favorite color
Map<String, Object> updates = new HashMap<>();
updates.put("age", 13);
updates.put("favorites.color", "Red");

// Async update document
ApiFuture<WriteResult> writeResult = frankDocRef.update(updates);
// ...
System.out.println("Update time : " + writeResult.get().getUpdateTime());
ManageDataSnippets.java
अजगर
# Create an initial document to update
frank_ref = db.collection(u'users').document(u'frank')
frank_ref.set({
    u'name': u'Frank',
    u'favorites': {
        u'food': u'Pizza',
        u'color': u'Blue',
        u'subject': u'Recess'
    },
    u'age': 12
})

# Update age and favorite color
frank_ref.update({
    u'age': 13,
    u'favorites.color': u'Red'
})
snippets.py

Python

# Create an initial document to update
frank_ref = db.collection("users").document("frank")
await frank_ref.set(
    {
        "name": "Frank",
        "favorites": {"food": "Pizza", "color": "Blue", "subject": "Recess"},
        "age": 12,
    }
)

# Update age and favorite color
await frank_ref.update({"age": 13, "favorites.color": "Red"})
snippets.py
सी++
// Assume the document contains:
// {
//   name: "Frank",
//   favorites: { food: "Pizza", color: "Blue", subject: "recess" }
//   age: 12
// }
//
// To update age and favorite color:
db->Collection("users").Document("frank").Update({
    {"age", FieldValue::Integer(13)},
    {"favorites.color", FieldValue::String("red")},
});
snippets.cpp
Node.js
const initialData = {
  name: 'Frank',
  age: 12,
  favorites: {
    food: 'Pizza',
    color: 'Blue',
    subject: 'recess'
  }
};

// ...
const res = await db.collection('users').doc('Frank').update({
  age: 13,
  'favorites.color': 'Red'
});
index.js
जाओ
initialData := map[string]interface{}{
	"name": "Frank",
	"age":  12,
	"favorites": map[string]interface{}{
		"food":    "Pizza",
		"color":   "Blue",
		"subject": "recess",
	},
}

// ...

_, err := client.Collection("users").Doc("frank").Set(ctx, map[string]interface{}{
	"age": 13,
	"favorites": map[string]interface{}{
		"color": "Red",
	},
}, firestore.MergeAll)
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}
save.go
पीएचपी
// Create an initial document to update
$frankRef = $db->collection('samples/php/users')->document('frank');
$frankRef->set([
    'first' => 'Frank',
    'last' => 'Franklin',
    'favorites' => ['food' => 'Pizza', 'color' => 'Blue', 'subject' => 'Recess'],
    'age' => 12
]);

// Update age and favorite color
$frankRef->update([
    ['path' => 'age', 'value' => 13],
    ['path' => 'favorites.color', 'value' => 'Red']
]);
data_set_nested_fields.php
एकता
DocumentReference frankDocRef = db.Collection("users").Document("frank");
Dictionary<string, object> initialData = new Dictionary<string, object>
{
	{ "Name", "Frank" },
	{ "Age", 12 }
};

Dictionary<string, object> favorites = new Dictionary<string, object>
{
	{ "Food", "Pizza" },
	{ "Color", "Blue" },
	{ "Subject", "Recess" },
};
initialData.Add("Favorites", favorites);
frankDocRef.SetAsync(initialData).ContinueWithOnMainThread(task => {

	// Update age and favorite color
	Dictionary<string, object> updates = new Dictionary<string, object>
	{
		{ "Age", 13 },
		{ "Favorites.Color", "Red" },
	};

	// Asynchronously update the document
	return frankDocRef.UpdateAsync(updates);
}).ContinueWithOnMainThread(task => {
	Debug.Log(
		"Updated the age and favorite color fields of the Frank document in "
		+ "the users collection.");
});
सी#
DocumentReference frankDocRef = db.Collection("users").Document("frank");
Dictionary<string, object> initialData = new Dictionary<string, object>
{
    { "Name", "Frank" },
    { "Age", 12 }
};

Dictionary<string, object> favorites = new Dictionary<string, object>
{
    { "Food", "Pizza" },
    { "Color", "Blue" },
    { "Subject", "Recess" },
};
initialData.Add("Favorites", favorites);
await frankDocRef.SetAsync(initialData);

// Update age and favorite color
Dictionary<string, object> updates = new Dictionary<string, object>
{
    { "Age", 13 },
    { "Favorites.Color", "Red" },
};

// Asynchronously update the document
await frankDocRef.UpdateAsync(updates);
Program.cs
माणिक
# Create an initial document to update
frank_ref = firestore.doc "#{collection_path}/frank"
frank_ref.set(
  {
    name:      "Frank",
    favorites: {
      food:    "Pizza",
      color:   "Blue",
      subject: "Recess"
    },
    age:       12
  }
)

# Update age and favorite color
frank_ref.update({ age: 13, "favorites.color": "Red" })
add_data.rb

डॉट नोटेशन आपको अन्य नेस्टेड फ़ील्ड को अधिलेखित किए बिना एकल नेस्टेड फ़ील्ड को अपडेट करने की अनुमति देता है। यदि आप डॉट नोटेशन के बिना नेस्टेड फ़ील्ड को अपडेट करते हैं, तो आप संपूर्ण मानचित्र फ़ील्ड को अधिलेखित कर देंगे, उदाहरण के लिए:

वेब

// Create our initial doc
db.collection("users").doc("frank").set({
  name: "Frank",
  favorites: {
    food: "Pizza",
    color: "Blue",
    subject: "Recess"
  },
  age: 12
}).then(function() {
  console.log("Frank created");
});

// Update the doc without using dot notation.
// Notice the map value for favorites.
db.collection("users").doc("frank").update({
  favorites: {
    food: "Ice Cream"
  }
}).then(function() {
  console.log("Frank food updated");
});

/*
Ending State, favorite.color and favorite.subject are no longer present:
/users
    /frank
        {
            name: "Frank",
            favorites: {
                food: "Ice Cream",
            },
            age: 12
        }
 */

किसी सरणी में तत्वों को अपडेट करें

यदि आपके दस्तावेज़ में एक सरणी फ़ील्ड है, तो आप तत्वों को जोड़ने और निकालने के लिए arrayUnion() और arrayRemove() का उपयोग कर सकते हैं। arrayUnion() तत्वों को एक सरणी में जोड़ता है लेकिन केवल तत्व पहले से मौजूद नहीं हैं। arrayRemove() प्रत्येक दिए गए तत्व के सभी उदाहरणों को हटा देता है।

Web version 9

import { doc, updateDoc, arrayUnion, arrayRemove } from "firebase/firestore";

const washingtonRef = doc(db, "cities", "DC");

// Atomically add a new region to the "regions" array field.
await updateDoc(washingtonRef, {
    regions: arrayUnion("greater_virginia")
});

// Atomically remove a region from the "regions" array field.
await updateDoc(washingtonRef, {
    regions: arrayRemove("east_coast")
});
update_document_array.js

Web version 8

var washingtonRef = db.collection("cities").doc("DC");

// Atomically add a new region to the "regions" array field.
washingtonRef.update({
    regions: firebase.firestore.FieldValue.arrayUnion("greater_virginia")
});

// Atomically remove a region from the "regions" array field.
washingtonRef.update({
    regions: firebase.firestore.FieldValue.arrayRemove("east_coast")
});
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
let washingtonRef = db.collection("cities").document("DC")

// Atomically add a new region to the "regions" array field.
washingtonRef.updateData([
    "regions": FieldValue.arrayUnion(["greater_virginia"])
])

// Atomically remove a region from the "regions" array field.
washingtonRef.updateData([
    "regions": FieldValue.arrayRemove(["east_coast"])
])
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
FIRDocumentReference *washingtonRef =
    [[self.db collectionWithPath:@"cities"] documentWithPath:@"DC"];

// Atomically add a new region to the "regions" array field.
[washingtonRef updateData:@{
  @"regions": [FIRFieldValue fieldValueForArrayUnion:@[@"greater_virginia"]]
}];

// Atomically remove a new region to the "regions" array field.
[washingtonRef updateData:@{
  @"regions": [FIRFieldValue fieldValueForArrayRemove:@[@"east_coast"]]
}];
ViewController.m

Java

DocumentReference washingtonRef = db.collection("cities").document("DC");

// Atomically add a new region to the "regions" array field.
washingtonRef.update("regions", FieldValue.arrayUnion("greater_virginia"));

// Atomically remove a region from the "regions" array field.
washingtonRef.update("regions", FieldValue.arrayRemove("east_coast"));
DocSnippets.java

Kotlin+KTX

val washingtonRef = db.collection("cities").document("DC")

// Atomically add a new region to the "regions" array field.
washingtonRef.update("regions", FieldValue.arrayUnion("greater_virginia"))

// Atomically remove a region from the "regions" array field.
washingtonRef.update("regions", FieldValue.arrayRemove("east_coast"))
DocSnippets.kt

Dart

final washingtonRef = db.collection("cities").doc("DC");

// Atomically add a new region to the "regions" array field.
washingtonRef.update({
  "regions": FieldValue.arrayUnion(["greater_virginia"]),
});

// Atomically remove a region from the "regions" array field.
washingtonRef.update({
  "regions": FieldValue.arrayRemove(["east_coast"]),
});
firestore.dart
जावा
DocumentReference washingtonRef = db.collection("cities").document("DC");

// Atomically add a new region to the "regions" array field.
ApiFuture<WriteResult> arrayUnion =
    washingtonRef.update("regions", FieldValue.arrayUnion("greater_virginia"));
System.out.println("Update time : " + arrayUnion.get());

// Atomically remove a region from the "regions" array field.
ApiFuture<WriteResult> arrayRm =
    washingtonRef.update("regions", FieldValue.arrayRemove("east_coast"));
System.out.println("Update time : " + arrayRm.get());
ManageDataSnippets.java
अजगर
city_ref = db.collection(u'cities').document(u'DC')

# Atomically add a new region to the 'regions' array field.
city_ref.update({u'regions': firestore.ArrayUnion([u'greater_virginia'])})

# // Atomically remove a region from the 'regions' array field.
city_ref.update({u'regions': firestore.ArrayRemove([u'east_coast'])})
snippets.py

Python

city_ref = db.collection("cities").document("DC")

# Atomically add a new region to the 'regions' array field.
await city_ref.update({"regions": firestore.ArrayUnion(["greater_virginia"])})

# // Atomically remove a region from the 'regions' array field.
await city_ref.update({"regions": firestore.ArrayRemove(["east_coast"])})
snippets.py
सी++
// This is not yet supported.
Node.js
// ...
const washingtonRef = db.collection('cities').doc('DC');

// Atomically add a new region to the "regions" array field.
const unionRes = await washingtonRef.update({
  regions: FieldValue.arrayUnion('greater_virginia')
});
// Atomically remove a region from the "regions" array field.
const removeRes = await washingtonRef.update({
  regions: FieldValue.arrayRemove('east_coast')
});

// To add or remove multiple items, pass multiple arguments to arrayUnion/arrayRemove
const multipleUnionRes = await washingtonRef.update({
  regions: FieldValue.arrayUnion('south_carolina', 'texas')
  // Alternatively, you can use spread operator in ES6 syntax
  // const newRegions = ['south_carolina', 'texas']
  // regions: FieldValue.arrayUnion(...newRegions)
});
index.js
जाओ
// Not supported yet
पीएचपी
$cityRef = $db->collection('samples/php/cities')->document('DC');

// Atomically add a new region to the "regions" array field.
$cityRef->update([
    ['path' => 'regions', 'value' => FieldValue::arrayUnion(['greater_virginia'])]
]);

// Atomically remove a region from the "regions" array field.
$cityRef->update([
    ['path' => 'regions', 'value' => FieldValue::arrayRemove(['east_coast'])]
]);
data_set_array_operations.php
एकता
// This is not yet supported in the Unity SDK
सी#
DocumentReference washingtonRef = db.Collection("cities").Document("DC");

// Atomically add a new region to the "regions" array field.
await washingtonRef.UpdateAsync("Regions", FieldValue.ArrayUnion("greater_virginia"));

// Atomically remove a region from the "regions" array field.
await washingtonRef.UpdateAsync("Regions", FieldValue.ArrayRemove("east_coast"));
Program.cs
माणिक
// Not supported yet

एक संख्यात्मक मान बढ़ाएँ

आप एक संख्यात्मक फ़ील्ड मान को बढ़ा या घटा सकते हैं जैसा कि निम्न उदाहरण में दिखाया गया है। एक इंक्रीमेंट ऑपरेशन किसी फ़ील्ड के वर्तमान मान को दी गई राशि से बढ़ाता या घटाता है।

Web version 9

import { doc, updateDoc, increment } from "firebase/firestore";

const washingtonRef = doc(db, "cities", "DC");

// Atomically increment the population of the city by 50.
await updateDoc(washingtonRef, {
    population: increment(50)
});
update_document_increment.js

Web version 8

var washingtonRef = db.collection('cities').doc('DC');

// Atomically increment the population of the city by 50.
washingtonRef.update({
    population: firebase.firestore.FieldValue.increment(50)
});
test.firestore.js
तीव्र
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
let washingtonRef = db.collection("cities").document("DC")

// Atomically increment the population of the city by 50.
// Note that increment() with no arguments increments by 1.
washingtonRef.updateData([
    "population": FieldValue.increment(Int64(50))
])
ViewController.swift
उद्देश्य सी
नोट: यह उत्पाद watchOS और ऐप क्लिप लक्ष्य पर उपलब्ध नहीं है।
FIRDocumentReference *washingtonRef =
    [[self.db collectionWithPath:@"cities"] documentWithPath:@"DC"];

// Atomically increment the population of the city by 50.
// Note that increment() with no arguments increments by 1.
[washingtonRef updateData:@{
  @"population": [FIRFieldValue fieldValueForIntegerIncrement:50]
}];
ViewController.m

Java

DocumentReference washingtonRef = db.collection("cities").document("DC");

// Atomically increment the population of the city by 50.
washingtonRef.update("population", FieldValue.increment(50));
DocSnippets.java

Kotlin+KTX

val washingtonRef = db.collection("cities").document("DC")

// Atomically increment the population of the city by 50.
washingtonRef.update("population", FieldValue.increment(50))
DocSnippets.kt

Dart

var washingtonRef = db.collection('cities').doc('DC');

// Atomically increment the population of the city by 50.
washingtonRef.update(
  {"population": FieldValue.increment(50)},
);
firestore.dart
जावा
DocumentReference washingtonRef = db.collection("cities").document("DC");

// Atomically increment the population of the city by 50.
final ApiFuture<WriteResult> updateFuture =
    washingtonRef.update("population", FieldValue.increment(50));
ManageDataSnippets.java
अजगर
washington_ref = db.collection(u'cities').document(u'DC')

washington_ref.update({"population": firestore.Increment(50)})
snippets.py

Python

washington_ref = db.collection("cities").document("DC")

washington_ref.update({"population": firestore.Increment(50)})
snippets.py
सी++
// This is not yet supported.
Node.js
// ...
const washingtonRef = db.collection('cities').doc('DC');

// Atomically increment the population of the city by 50.
const res = await washingtonRef.update({
  population: FieldValue.increment(50)
});
index.js
जाओ
import (
	"context"
	"fmt"

	"cloud.google.com/go/firestore"
)

// updateDocumentIncrement increments the population of the city document in the
// cities collection by 50.
func updateDocumentIncrement(projectID, city string) error {
	// projectID := "my-project"

	ctx := context.Background()

	client, err := firestore.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("firestore.NewClient: %v", err)
	}
	defer client.Close()

	dc := client.Collection("cities").Doc(city)
	_, err = dc.Update(ctx, []firestore.Update{
		{Path: "population", Value: firestore.Increment(50)},
	})
	if err != nil {
		return fmt.Errorf("Update: %v", err)
	}

	return nil
}

increment.go
पीएचपी
$cityRef = $db->collection('samples/php/cities')->document('DC');

// Atomically increment the population of the city by 50.
$cityRef->update([
    ['path' => 'regions', 'value' => FieldValue::increment(50)]
]);
data_set_numeric_increment.php
एकता
// This is not yet supported in the Unity SDK.
सी#
DocumentReference washingtonRef = db.Collection("cities").Document("DC");

// Atomically increment the population of the city by 50.
await washingtonRef.UpdateAsync("Regions", FieldValue.Increment(50));
Program.cs
माणिक
city_ref = firestore.doc "#{collection_path}/DC"
city_ref.update({ population: firestore.field_increment(50) })
add_data.rb

इंक्रीमेंट ऑपरेशन काउंटरों को लागू करने के लिए उपयोगी होते हैं, लेकिन ध्यान रखें कि आप एक दस्तावेज़ को प्रति सेकंड केवल एक बार अपडेट कर सकते हैं। यदि आप अपने काउंटर को इस दर से अधिक अद्यतन करना चाहते हैं, तो वितरित काउंटर पृष्ठ देखें।