FireBase错误:尚未创建FireBase应用程序默认值 [英] Firebase error: No firebase app default has been created
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问题描述
我正在使用REACTION-NATIVE和REDUX制作一个外卖应用程序。我想要从Firebase存储区获取数据,为此,我在Actions.js中编写了一个函数,但每当我运行应用程序时,它都会显示错误
Firebase: No Firebase App '[DEFAULT]' has been created - call Firebase App.initializeApp() (app/no-app).
import firebase from "firebase"
export const ProductDetails = (data) => {
return {
type: "PRODUCT_ITEMS",
payload: {
data,
},
};
};
var db = firebase.firestore();
var docRef = db.collection("Products").doc("Items");
export const FetchItems = () => {
return async function (dispatch) {
return await docRef
.get()
.then((doc) => {
if (doc.exists) {
console.log("Document Data", doc.data());
dispatch(ProductDetails(doc.data));
} else {
console.log("NO such document");
}
})
.catch((error) => {
console.log(error);
});
};
};
这是我的App.js文件
import React, { useState } from "react";
import { StyleSheet, Text, View, Dimensions } from "react-native";
import { NavigationContainer } from "@react-navigation/native";
import AppStack from "./components/navigation/AppStack";
import firebase from "firebase";
import {Provider} from "redux"
import store from "./store"
import { useDispatch, useSelector, Provider } from "react-redux";
import store from "./redux/store";
import AppWrapper from "./AppWrapper";
export default function App() {
const firebaseConfig = {
};
if (firebase.apps.length === 0) {
firebase.initializeApp(firebaseConfig);
}
return (
<Provider store={store}>
<NavigationContainer>
<AppStack />
</NavigationContainer>
</Provider>
);;
}
推荐答案
我建议您创建一个单独的文件firebase.js
,并在初始化后从那里导出Firebase服务。
Firebase.js
import firebase from 'firebase/app';
import 'firebase/firestore'
const firebaseConfig = {...};
if (!firebase.apps.length) {
firebase.initializeApp(config);
}
export const auth = firebase.auth();
export const firestore = firebase.firestore()
然后将它们导入到您需要的任何位置:
// App.js for example
import {firestore, auth} from './firebase.js'
//var docRef = firestore.collection("Products").doc("Items");
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