复制 // 获取另一个文档中的参考文档constdb=firebase.firestore();constdocRef=db.collection('collectionName').doc('documentId');docRef.get().then((doc)=>{if(doc.exists){constref=doc.data().referenceField;console.log('参考文档:',ref);}else{console.log('文档不存在');}}).catch((err...
const q = query(collection(db, "cities"), where("capital", "==", true)); const querySnapshot = await getDocs(q); querySnapshot.forEach((doc) => { // doc.data() is never undefined for query doc snapshots console.log(doc.id, " => ", doc.data()); }); 但是,控制台中没有...
// 导入firestore相关的函数包import{getFirestore,getDoc,doc}from"firebase/firestore";// 初始化firestoreconstdb=getFirestore(app);// 调用database的函数(全局函数的形式)window.SAMPLE_FUNCTION_NAME=asyncfunction(){constdocRef=doc(db,"DATABASE_NAME","DATAITEM_NAME");constdocSnap=awaitgetDoc();if(doc...
import{ useState, useEffect }from'react';importTodofrom'./components/Todo';import{ db }from'./firebase';functionApp() {const[todos, setTodos] =useState([])const[input, setInput] =useState('')useEffect(() =>{ db.collection('todos').onSnapshot(snapshot=>{setTodos(snapshot.docs.map(doc...
// 引用要更新的文档vardocRef=db.collection("users").doc("user1");// 获取文档的快照docRef.get().then(function(doc){if(doc.exists){// 从快照中提取要更新的字段vardata=doc.data();data.field1="new value";// 更新文档docRef.update(data).then(function(){console.log("字段更新成功");})....
db.collection("teams").get().then(function(querySnapshot) { querySnapshot.forEach(function(doc) { // doc.data() is never undefined for query doc snapshots let data = doc.data(); teams.push(data) // console.log(doc.id, " => ", doc.data()); ...
export const db = getFirestore(app); 我确信这会被初始化。 当我导出它并在其他文件中使用它时。collection在vs代码中变灰,这意味着我没有使用导入。 databaseservice.js import { db } from './config'; import { collection, doc } from 'firebase/firestore'; ...
const snapshot = await getDocs(this.collectionRef); return snapshot.docs.map((doc) => { const data = doc.data(); return data ? { id: doc.id, ...data } : null; }); } } export default new experiencesDAO();44 changes: 44 additions & 0 deletions 44 src/pages/api/experiences.ts...
4 import { collection, updateDoc, arrayUnion, doc, getDoc } from 'firebase/firestore'; 5 1. 2. 3. 4. 5. 6. 复制 第2步:组件声明和初始状态 定义KitchenAssistant组件,并为用户命令、响应和语音识别初始化状态。 TypeScript 1 export default function KitchenAssistant() { ...
import{Firestore,doc,getDoc}from'@angular/fire/firestore';// Should be injected in the Angular constructorconstdb=Firestore;constdocRef=doc(db,"cities","SF");constdocSnap=awaitgetDoc(docRef);if(docSnap.exists()){console.log("Document data:",docSnap.data());}else{// doc.data() will be...