ক্লাউড ফায়ারস্টোরে ডেটা লেখার বিভিন্ন উপায় রয়েছে:
- একটি সংগ্রহের মধ্যে একটি নথির ডেটা সেট করুন, স্পষ্টভাবে একটি নথি শনাক্তকারী নির্দিষ্ট করুন৷
- একটি সংগ্রহে একটি নতুন নথি যোগ করুন। এই ক্ষেত্রে, ক্লাউড ফায়ারস্টোর স্বয়ংক্রিয়ভাবে নথি শনাক্তকারী তৈরি করে।
- একটি স্বয়ংক্রিয়ভাবে তৈরি শনাক্তকারী সহ একটি খালি নথি তৈরি করুন এবং পরে এটিতে ডেটা বরাদ্দ করুন৷
ক্লাউড ফায়ারস্টোরে পৃথক নথিগুলি সেট, যোগ বা আপডেট কীভাবে ব্যবহার করবেন তা এই নির্দেশিকা ব্যাখ্যা করে৷ আপনি যদি প্রচুর পরিমাণে ডেটা লিখতে চান, লেনদেন এবং ব্যাচড রাইটস দেখুন।
একটি নথি সেট করুন
একটি একক নথি তৈরি বা ওভাররাইট করতে, set()
পদ্ধতি ব্যবহার করুন:
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" });
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); });
সুইফট
// 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!") } }
উদ্দেশ্য গ
// 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!"); } }];
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); } });
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) }
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"));
জাভা
পাইথন
Python
সি++
// 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; } });
Node.js
যাওয়া
পিএইচপি
$data = [ 'name' => 'Los Angeles', 'state' => 'CA', 'country' => 'USA' ]; $db->collection('samples/php/cities')->document('LA')->set($data);
ঐক্য
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."); });
সি#
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);
রুবি
নথিটি বিদ্যমান না থাকলে, এটি তৈরি করা হবে। যদি নথিটি বিদ্যমান থাকে, তবে এর বিষয়বস্তু নতুন প্রদত্ত ডেটা দিয়ে ওভাররাইট করা হবে, যদি না আপনি উল্লেখ করেন যে ডেটা বিদ্যমান নথিতে একত্রিত করা উচিত, নিম্নরূপ:
Web version 9
import { doc, setDoc } from "firebase/firestore"; const cityRef = doc(db, 'cities', 'BJ'); setDoc(cityRef, { capital: true }, { merge: true });
Web version 8
var cityRef = db.collection('cities').doc('BJ'); var setWithMerge = cityRef.set({ capital: true }, { merge: true });
সুইফট
// Update one field, creating the document if it does not exist. db.collection("cities").document("BJ").setData([ "capital": true ], merge: true)
উদ্দেশ্য গ
// 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) { // ... }];
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());
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())
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));
জাভা
পাইথন
Python
সি++
db->Collection("cities").Document("BJ").Set( {{"capital", FieldValue::Boolean(true)}}, SetOptions::Merge());
Node.js
যাওয়া
পিএইচপি
$cityRef = $db->collection('samples/php/cities')->document('BJ'); $cityRef->set([ 'capital' => true ], ['merge' => true]);
ঐক্য
DocumentReference docRef = db.Collection("cities").Document("LA"); Dictionary<string, object> update = new Dictionary<string, object> { { "capital", false } }; docRef.SetAsync(update, SetOptions.MergeAll);
সি#
DocumentReference docRef = db.Collection("cities").Document("LA"); Dictionary<string, object> update = new Dictionary<string, object> { { "capital", false } }; await docRef.SetAsync(update, SetOptions.MergeAll);
রুবি
যদি আপনি নিশ্চিত না হন যে নথিটি বিদ্যমান কিনা, সম্পূর্ণ নথিগুলিকে ওভাররাইট করা এড়াতে যে কোনও বিদ্যমান নথির সাথে নতুন ডেটা মার্জ করার বিকল্পটি পাস করুন৷ মানচিত্র সম্বলিত নথিগুলির জন্য, মনে রাখবেন যে একটি খালি মানচিত্র ধারণকারী একটি ক্ষেত্র সহ একটি সেট নির্দিষ্ট করা লক্ষ্য নথির মানচিত্র ক্ষেত্রটি ওভাররাইট করবে।
তথ্যের ধরণ
ক্লাউড ফায়ারস্টোর আপনাকে স্ট্রিং, বুলিয়ান, সংখ্যা, তারিখ, নাল এবং নেস্টেড অ্যারে এবং অবজেক্ট সহ একটি নথির মধ্যে বিভিন্ন ধরণের ডেটা লিখতে দেয়। ক্লাউড ফায়ারস্টোর সর্বদা সংখ্যাগুলিকে দ্বিগুণ হিসাবে সঞ্চয় করে, আপনি আপনার কোডে যে ধরণের নম্বর ব্যবহার করেন তা নির্বিশেষে।
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);
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!"); });
সুইফট
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!") } }
উদ্দেশ্য গ
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!"); } }];
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); } });
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) }
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"));
জাভা
পাইথন
Python
সি++
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; } });
Node.js
যাওয়া
পিএইচপি
$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);
ঐক্য
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);
সি#
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);
রুবি
কাস্টম অবজেক্ট
আপনার নথিগুলি উপস্থাপন করার জন্য Map
বা Dictionary
অবজেক্ট ব্যবহার করা প্রায়শই খুব সুবিধাজনক নয়, তাই ক্লাউড ফায়ারস্টোর কাস্টম ক্লাস সহ নথি লেখা সমর্থন করে। ক্লাউড ফায়ারস্টোর বস্তুগুলিকে সমর্থিত ডেটা প্রকারে রূপান্তর করে।
কাস্টম ক্লাস ব্যবহার করে, আপনি দেখানো হিসাবে প্রাথমিক উদাহরণ পুনরায় লিখতে পারেন:
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); } };
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); } };
সুইফট
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 } }
উদ্দেশ্য গ
// This isn't supported in Objective-C.
Java
প্রতিটি কাস্টম ক্লাসে অবশ্যই একটি পাবলিক কনস্ট্রাক্টর থাকতে হবে যা কোন আর্গুমেন্ট নেয় না। উপরন্তু, ক্লাস প্রতিটি সম্পত্তি জন্য একটি পাবলিক গেটার অন্তর্ভুক্ত করা আবশ্যক.
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; } }
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 )
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, }; } }
জাভা
পাইথন
Python
সি++
// This is not yet supported.
Node.js
// Node.js uses JavaScript objects
যাওয়া
পিএইচপি
// This isn't supported in PHP
ঐক্য
[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; } }
সি#
[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; } }
রুবি
// 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"));
Web version 8
// Set with cityConverter db.collection("cities").doc("LA") .withConverter(cityConverter) .set(new City("Los Angeles", "CA", "USA"));
সুইফট
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)") }
উদ্দেশ্য গ
// 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);
Kotlin+KTX
val city = City("Los Angeles", "CA", "USA", false, 5000000L, listOf("west_coast", "socal")) db.collection("cities").document("LA").set(city)
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);
জাভা
পাইথন
Python
সি++
// This is not yet supported.
Node.js
// Node.js uses JavaScript objects
যাওয়া
পিএইচপি
// This isn't supported in PHP.
ঐক্য
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);
সি#
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);
রুবি
// This isn't supported in Ruby.
একটি নথি যোগ করুন
যখন আপনি একটি নথি তৈরি করতে set()
ব্যবহার করেন, তখন নথি তৈরি করার জন্য আপনাকে অবশ্যই একটি আইডি নির্দিষ্ট করতে হবে। উদাহরণ স্বরূপ:
Web version 9
import { doc, setDoc } from "firebase/firestore"; await setDoc(doc(db, "cities", "new-city-id"), data);
Web version 8
db.collection("cities").doc("new-city-id").set(data);
সুইফট
db.collection("cities").document("new-city-id").setData(data)
উদ্দেশ্য গ
[[[self.db collectionWithPath:@"cities"] documentWithPath:@"new-city-id"] setData:data];
Java
db.collection("cities").document("new-city-id").set(data);
Kotlin+KTX
db.collection("cities").document("new-city-id").set(data)
Dart
db.collection("cities").doc("new-city-id").set({"name": "Chicago"});
জাভা
পাইথন
Python
সি++
db->Collection("cities").Document("SF").Set({/*some data*/});
Node.js
যাওয়া
পিএইচপি
$db->collection('samples/php/cities')->document('new-city-id')->set($data);
ঐক্য
db.Collection("cities").Document("new-city-id").SetAsync(city);
সি#
await db.Collection("cities").Document("new-city-id").SetAsync(city);
রুবি
কিন্তু কখনও কখনও নথির জন্য একটি অর্থপূর্ণ আইডি থাকে না এবং ক্লাউড ফায়ারস্টোরকে আপনার জন্য একটি আইডি স্বয়ংক্রিয়ভাবে তৈরি করতে দেওয়া আরও সুবিধাজনক৷ আপনি add()
কল করে এটি করতে পারেন:
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);
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); });
সুইফট
// 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)") } }
উদ্দেশ্য গ
// 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); } }];
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); } });
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) }
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}"));
জাভা
পাইথন
Python
সি++
db->Collection("cities").Add({/*some data*/});
Node.js
যাওয়া
পিএইচপি
$data = [ 'name' => 'Tokyo', 'country' => 'Japan' ]; $addedDocRef = $db->collection('samples/php/cities')->add($data); printf('Added document with ID: %s' . PHP_EOL, $addedDocRef->id());
ঐক্য
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)); });
সি#
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);
রুবি
কিছু ক্ষেত্রে, এটি একটি স্বয়ংক্রিয়-উত্পন্ন আইডি সহ একটি নথির রেফারেন্স তৈরি করা কার্যকর হতে পারে, তারপরে রেফারেন্সটি ব্যবহার করুন৷ এই ব্যবহারের ক্ষেত্রে, আপনি কল করতে পারেন doc()
:
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);
Web version 8
// Add a new document with a generated id. var newCityRef = db.collection("cities").doc(); // later... newCityRef.set(data);
সুইফট
let newCityRef = db.collection("cities").document() // later... newCityRef.setData([ // ... ])
উদ্দেশ্য গ
FIRDocumentReference *newCityRef = [[self.db collectionWithPath:@"cities"] documentWithAutoID]; // later... [newCityRef setData:@{ /* ... */ }];
Java
Map<String, Object> data = new HashMap<>(); DocumentReference newCityRef = db.collection("cities").document(); // Later... newCityRef.set(data);
Kotlin+KTX
val data = HashMap<String, Any>() val newCityRef = db.collection("cities").document() // Later... newCityRef.set(data)
Dart
// Add a new document with a generated id. final data = <String, dynamic>{}; final newCityRef = db.collection("cities").doc(); // Later... newCityRef.set(data);
জাভা
পাইথন
Python
সি++
DocumentReference new_city_ref = db->Collection("cities").Document();
Node.js
যাওয়া
পিএইচপি
$addedDocRef = $db->collection('samples/php/cities')->newDocument(); printf('Added document with ID: %s' . PHP_EOL, $addedDocRef->id()); $addedDocRef->set($data);
ঐক্য
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)); });
সি#
DocumentReference addedDocRef = db.Collection("cities").Document(); Console.WriteLine("Added document with ID: {0}.", addedDocRef.Id); await addedDocRef.SetAsync(city);
রুবি
পর্দার পিছনে, .add(...)
এবং .doc().set(...)
সম্পূর্ণ সমতুল্য, তাই আপনি যেটি আরও সুবিধাজনক তা ব্যবহার করতে পারেন।
একটি নথি আপডেট করুন
সম্পূর্ণ নথি ওভাররাইট না করে একটি নথির কিছু ক্ষেত্র আপডেট করতে, update()
পদ্ধতি ব্যবহার করুন:
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 });
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); });
সুইফট
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") } }
উদ্দেশ্য গ
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"); } }];
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); } });
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) }
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"));
জাভা
পাইথন
Python
সি++
DocumentReference washington_ref = db->Collection("cities").Document("DC"); // Set the "capital" field of the city "DC". washington_ref.Update({{"capital", FieldValue::Boolean(true)}});
Node.js
যাওয়া
পিএইচপি
$cityRef = $db->collection('samples/php/cities')->document('DC'); $cityRef->update([ ['path' => 'capital', 'value' => true] ]);
ঐক্য
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);
সি#
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);
রুবি
সার্ভার টাইমস্ট্যাম্প
আপনি আপনার নথিতে একটি সার্ভার টাইমস্ট্যাম্পে একটি ক্ষেত্র সেট করতে পারেন যা সার্ভার আপডেট গ্রহণ করার সময় ট্র্যাক করে।
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() });
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() });
সুইফট
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") } }
উদ্দেশ্য গ
[[[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"); } }];
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>() { // ... // ...
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 { }
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"));
জাভা
পাইথন
Python
সি++
DocumentReference doc_ref = db->Collection("objects").Document("some-id"); doc_ref.Update({{"timestamp", FieldValue::ServerTimestamp()}}) .OnCompletion([](const Future<void>& future) { // ... });
Node.js
যাওয়া
পিএইচপি
$docRef = $db->collection('samples/php/objects')->document('some-id'); $docRef->update([ ['path' => 'timestamp', 'value' => FieldValue::serverTimestamp()] ]);
ঐক্য
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."); });
সি#
DocumentReference cityRef = db.Collection("cities").Document("new-city-id"); await cityRef.UpdateAsync("Timestamp", Timestamp.GetCurrentTimestamp());
রুবি
একটি লেনদেনের ভিতরে একাধিক টাইমস্ট্যাম্প ক্ষেত্র আপডেট করার সময়, প্রতিটি ক্ষেত্র একই সার্ভার টাইমস্ট্যাম্প মান পায়।
নেস্টেড অবজেক্টে ক্ষেত্র আপডেট করুন
যদি আপনার নথিতে নেস্টেড অবজেক্ট থাকে, আপনি যখন update()
কল করেন তখন নথির মধ্যে নেস্টেড ক্ষেত্রগুলি উল্লেখ করতে আপনি "ডট নোটেশন" ব্যবহার করতে পারেন :
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" });
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!"); });
সুইফট
// 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") } }
উদ্দেশ্য গ
// 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"); } }];
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" );
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" ))
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"});
জাভা
পাইথন
Python
সি++
// 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")}, });
Node.js
যাওয়া
পিএইচপি
// 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'] ]);
ঐক্য
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."); });
সি#
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);
রুবি
ডট নোটেশন আপনাকে অন্যান্য নেস্টেড ক্ষেত্র ওভাররাইট না করে একটি একক নেস্টেড ক্ষেত্র আপডেট করতে দেয়। আপনি যদি ডট নোটেশন ছাড়া একটি নেস্টেড ক্ষেত্র আপডেট করেন, তাহলে আপনি সমগ্র মানচিত্রের ক্ষেত্রটি ওভাররাইট করবেন, উদাহরণস্বরূপ:
ওয়েব
// 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 } */
একটি অ্যারে উপাদান আপডেট করুন
যদি আপনার নথিতে একটি অ্যারে ক্ষেত্র থাকে, আপনি উপাদানগুলি যোগ করতে এবং সরাতে arrayUnion arrayUnion()
এবং arrayRemove()
ব্যবহার করতে পারেন। arrayUnion()
একটি অ্যারেতে উপাদান যোগ করে কিন্তু শুধুমাত্র উপাদানগুলি ইতিমধ্যে উপস্থিত নয়। arrayRemove()
প্রতিটি প্রদত্ত উপাদানের সমস্ত দৃষ্টান্ত সরিয়ে দেয়।
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") });
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") });
সুইফট
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"]) ])
উদ্দেশ্য গ
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"]] }];
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"));
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"))
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"]), });
জাভা
পাইথন
Python
সি++
// This is not yet supported.
Node.js
যাওয়া
// Not supported yet
পিএইচপি
$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'])] ]);
ঐক্য
// This is not yet supported in the Unity SDK
সি#
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"));
রুবি
// Not supported yet
একটি সংখ্যাসূচক মান বৃদ্ধি করুন
আপনি নিম্নলিখিত উদাহরণে দেখানো হিসাবে একটি সংখ্যাসূচক ক্ষেত্রের মান বৃদ্ধি বা হ্রাস করতে পারেন। একটি ইনক্রিমেন্ট অপারেশন প্রদত্ত পরিমাণ দ্বারা একটি ক্ষেত্রের বর্তমান মান বৃদ্ধি বা হ্রাস করে।
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) });
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) });
সুইফট
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)) ])
উদ্দেশ্য গ
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] }];
Java
DocumentReference washingtonRef = db.collection("cities").document("DC"); // Atomically increment the population of the city by 50. washingtonRef.update("population", FieldValue.increment(50));
Kotlin+KTX
val washingtonRef = db.collection("cities").document("DC") // Atomically increment the population of the city by 50. washingtonRef.update("population", FieldValue.increment(50))
Dart
var washingtonRef = db.collection('cities').doc('DC'); // Atomically increment the population of the city by 50. washingtonRef.update( {"population": FieldValue.increment(50)}, );
জাভা
পাইথন
Python
সি++
// This is not yet supported.
Node.js
যাওয়া
পিএইচপি
$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)] ]);
ঐক্য
// This is not yet supported in the Unity SDK.
সি#
DocumentReference washingtonRef = db.Collection("cities").Document("DC"); // Atomically increment the population of the city by 50. await washingtonRef.UpdateAsync("Regions", FieldValue.Increment(50));
রুবি
ইনক্রিমেন্ট অপারেশনগুলি কাউন্টারগুলি বাস্তবায়নের জন্য দরকারী, তবে মনে রাখবেন যে আপনি প্রতি সেকেন্ডে শুধুমাত্র একবার একটি একক নথি আপডেট করতে পারেন৷ এই হারের উপরে আপনার কাউন্টার আপডেট করার প্রয়োজন হলে, ডিস্ট্রিবিউটেড কাউন্টার পৃষ্ঠাটি দেখুন।