javascript - 将 React 与 Cloud Firestore 结合使用

Question

我正在尝试弄清楚如何让 Cloud Firestore 与 React 应用程序一起使用。

我找到了this tutorial ，它使用实时数据库进行 react ，并已加载它。现在我正在尝试找出需要进行哪些更改才能使其与 cloud firestore 一起使用。

在我的 firebase.js 中，我有:

import app from 'firebase/app';
import 'firebase/auth';
import 'firebase/firestore';
import firestore from "firebase/firestore";

class Firebase {
  constructor() {
    app.initializeApp(config).firestore();
    this.auth = app.auth();
    // this.db = app.firebase.database()
    this.db = app.firebase.firestore();

  }  

    doCreateUserWithEmailAndPassword = (email, password) =>
      this.auth.createUserWithEmailAndPassword(email, password);  
    doSignInWithEmailAndPassword = (email, password) =>
      this.auth.signInWithEmailAndPassword(email, password);  
    doSignOut = () => 
      this.auth.signOut();
    doPasswordReset = email => 
      this.auth.sendPasswordResetEmail(email);
    doPasswordUpdate = password =>
      this.auth.currentUser.updatePassword(password);

    // *** User API ***
    user = uid => this.db.ref(`users/${uid}`);
    users = () => this.db.ref('users');  

}
export default Firebase;

然后，以我的形式，我尝试这样做:

import { withFirebase } from '../../../components/firebase';

onSubmit = event => {
    const { username, email, passwordOne } = this.state;

    this.props.firebase
      .doCreateUserWithEmailAndPassword(email, passwordOne)
      .then(authUser => {
        // Create a user 
        return this.props.firebase
          .user(authUser.user.uid)
          .set({
            username,
            email,
          });

      })
      .then(authUser => {
        this.setState({ ...INITIAL_STATE });
        this.props.history.push(ROUTES.INITIAL_PROFILE);
      })
      .catch(error => {
        this.setState({ error });
      });
      event.preventDefault();
  }
  onChange = event => {
    this.setState({ [event.target.name]: event.target.value });
  };

导入 withFirebase 具有:

import FirebaseContext, { withFirebase } from './Context';
import Firebase from '../../firebase.1';
export default Firebase;
export { FirebaseContext, withFirebase };

FirebaseContext 具有:

import React from 'react';
const FirebaseContext = React.createContext(null);

export const withFirebase = Component => props => (
  <FirebaseContext.Consumer>
    {firebase => <Component {...props} firebase={firebase} />}
  </FirebaseContext.Consumer>
);
export default FirebaseContext;

当我尝试此操作时，我收到一条错误消息:

类型错误:无法读取未定义的属性“firestore”

错误消息指向 firebase 配置文件的这一行:

this.db = app.firebase.firestore();

如何让 firestore 在 React 应用程序中工作？

Answer 1

更改此:

this.db = app.firebase.firestore();

进入此:

this.db = app.firestore();

initializeApp()返回类型 App，在 App 中您可以找到方法 firestore():

https://firebase.google.com/docs/reference/js/firebase.app.App.html#firestore