通过get()方法执行查询,并使用docs属性获取查询结果的文档列表。 处理查询结果: 代码语言:txt 复制 for (DocumentSnapshot document in documents) { // 处理每个文档 Map<String, dynamic> data = document.data(); // 获取文档中的数据 } 可以遍历查询结果的文档列表,并使用data()方法获取每个文档...
使用get()函数的示例代码如下: 代码语言:txt 复制 import { collection, getDocs } from "firebase/firestore"; import { useEffect } from "react"; const fetchData = async () => { const querySnapshot = await getDocs(collection(db, "users")); querySnapshot.forEach((doc) => { con...
Firestore 文档对我来说似乎很困惑。假设我有一组帖子:posts: [{ name: 'Foo' }, { name: 'Bar' }]我想得到一个名字的帖子Foo。遵循本指南: https ://firebase.google.com/docs/firestore/query-data/get-data它从这一行开始: var docRef = db.collection("cities").doc("SF");我不明白什么.doc("...
由于用户是云firestore中的文档,因此您可以根据documentatin https://firebase.google.com/docs/firestore/query-data/get-data以这种方式检索单个文档 来自文件: - 以下示例显示如何使用get()检索单个文档的内容: var docRef = db.collection("cities").doc("SF"); docRef.get().then(function(doc) { if (...
I use vue js with firebase firestore database, I've changed my database rules toallow read: if true; allow write: if request.auth != null;how to config this auth in my project? anyone could help me pls? I could not find the docs about this rules and auth configuration ...
docsData.push({ id: doc.id, ...doc.data() })); console.log('Docs from Cache: ', snapshotCache.docs.length); snapshotDb = await getDocsFromServer(query, where('timestamp', ">", latestTimestamp)); console.log('Docs from DB: ', snapshotDb.docs.length); snapshotDb.docs.for...
我不知道如何将从Firestore检索到的这些文档数据模型放在listData中,这就是为什么控制台listData中没有任何数据。谢谢:) Param B. 我想问题在这里。 await locationCollection.get().then((QuerySnapshot querySnapshot){ querySnapshot.docs.forEach((doc) { ...
您可以将其Map到您需要的内容。https://firebase.google.com/docs/firestore/query-data/get-data ...
var collection = await query.get(); //get the users list from query snapshot var users = collection.docs.map((doc) => User.fromSnapshot(doc)).toList(); return users; } 然而,我得到了错误: Functions marked 'async' must have a return type assignable to 'Future'. ...
for (const name of ["1k", "10k", "1m", "10m"]) { const start = Date.now(); const result = await getCountFromServer(collection(db, name)); console.log(`Collection '${name}' contains ${result.data().count} docs (counting took ${Date.now()-start}ms)`); } 我得到的结果如...