[英]Why is data from the Firebase realtime database only rendering in the console, but not on the page while using Vue.js?
當我嘗試渲染存儲在我的 Firebase 實時數據庫中的值時,我可以在 console.log 中看到它,但在 Vue 中使用 {{ Exams.name }} 語法時它不會在頁面上渲染。 當我設置相同的東西但使用 Firestore 時,我能夠將它呈現到頁面上。
我在我的主儀表板視圖中使用此代碼:
import firebase from '@/firebase/firebaseConfig.js'
import db from '@/firebase/firebaseConfig.js'
import { database } from '@/firebase/firebaseConfig.js'
export default {
data() {
return {
checkpointReward: {},
subscribersGained: {},
ordersRecevied: {},
salesBarSession: {},
supportTracker: {},
productsOrder: {},
salesRadar: {},
totalStudents: {},
examRef: {},
exams: {},
studentName: {},
students: {},
testingData: {},
analyticsData,
dispatchedOrders: []
}
},
// Initialize Firebase
const examRef = database.ref('exams');
examRef.on('value', gotData, errData);
function gotData(data) {
const exams = data.val();
const studentData = exams.name;
console.log(exams.name);
}
function errData(err) {
console.lof("Error!");
console.log(err);
}
我不知道您是否在沒有組件的某些部分的情況下粘貼了代碼,但這部分應該在方法內並將值分配給 this.desired_state_value ,如下所示:
export default {
data() {
return {
checkpointReward: {},
subscribersGained: {},
ordersRecevied: {},
salesBarSession: {},
supportTracker: {},
productsOrder: {},
salesRadar: {},
totalStudents: {},
examRef: {},
[...]
},
methods: {
getExams(){
// Initialize Firebase
this.examRef = database.ref('exams');
this.examRef.on('value', gotData, errData);
function gotData(data) {
const exams = data.val();
const studentData = exams.name;
console.log(exams.name);
}
function errData(err) {
console.lof("Error!");
console.log(err);
}
}
}
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