如何解决带有@ angular / fire Freeze Web App的Angular
我在Web应用程序中遇到了奇怪的情况,在5秒钟后完成加载正确的数据和页面呈现后,我的应用程序获得了3 / 3.5秒钟的堆栈,我监视了性能并看到angulr-fire-database重新启动,我没有不明白为什么...看到我的屏幕...绿色区域代表我的Web应用程序完成加载和渲染,红色区域自动开始...
我希望很好地揭露我的问题,我记录了我的代码以获得更好的答案
Package.json
"dependencies": {
"@angular/animations": "^10.0.9","@angular/common": "^10.0.9","@angular/core": "^10.0.9","@angular/fire": "^6.0.2","@angular/forms": "~10.0.9","@angular/platform-browser": "~10.0.9","@angular/platform-browser-dynamic": "~10.0.9","@angular/platform-server": "^10.0.9","@angular/router": "~10.0.9","@angular/service-worker": "^10.0.9","@fullcalendar/angular": "^5.3.1","@fullcalendar/interaction": "^5.3.1","@fullcalendar/resource-timeline": "^5.3.1","@ionic-native/core": "^5.0.0","@ionic-native/splash-screen": "^5.0.0","@ionic-native/status-bar": "^5.0.0","@ionic/angular": "^5.3.1","@ionic/angular-server": "^5.4.0-dev.202009102321.26d3971","@jermeo/ionic4-datepicker": "^1.0.15","@nguniversal/express-engine": "^10.0.2","@stripe/stripe-js": "^1.9.0","@swimlane/ngx-datatable": "^18.0.0","@types/moment": "^2.13.0","cordova-android": "^9.0.0","cordova-plugin-ionic": "^5.4.6","core-js": "^3.6.4","express": "^4.17.1","firebase": "^7.24.0","idb": "^5.0.7","moment": "^2.28.0","rxjs": "^6.5.5","tslib": "^1.10.0","uuid": "^8.3.0","zone.js": "~0.10.2"
beach.service.ts
import { Injectable } from '@angular/core';
import { DatePipe } from '@angular/common';
import { ToastController } from '@ionic/angular';
import { AngularFireDatabase } from '@angular/fire/database';
import { map } from 'rxjs/operators';
import { BeachSeatModel,PalmsDataModel,BeachGuest,BeachPalmsPriceModel } from '../model/beach.model';
import moment from 'moment';
import { HttpClient,HttpHeaders } from '@angular/common/http';
import { AuthService } from './auth.service';
@Injectable({ providedIn: 'root' })
export class BeachServiceProvider {
userLoggedIn: any;
constructor(private beachFirebaseDB: AngularFireDatabase,private authService: AuthService,private http: HttpClient,public toastController: ToastController) {
this.authService.firebaseUser.subscribe(user => {
if (user) {
this.userLoggedIn = user.uid;
}
});
}
getBookedPalme(selectedDateFrom: number,selectedDateTo: number) {
return this.beachFirebaseDB.list<BeachSeatModel>('beachBookedPalma/',ref =>
ref.equalTo('deleted: false')).snapshotChanges().pipe(map(date => {
return date.map(value => {
const key = value.payload.key;
const val = value.payload.val();
if (selectedDateTo >= +val.dateFrom && selectedDateFrom <= +val.dateTo) {
return { key,val };
}
});
}));
}
}
beach.page.ts
checkBeachSeatAvailability() {
this.phoneNumberSearchField = null;
this.guestNameSearchField = null;
let palmsFilterDataRang: {key: string,val: BeachSeatModel}[] = [];
this.beachServiceSubscription = this.beachService.getBookedPalmeGlobal().subscribe(async
palma => {
palmsFilterDataRang = [];
const arrayPalmaLength = palma.length;
for (let index = 0; index < arrayPalmaLength; index++) {
const element = palma[index];
if (element !== undefined && !element.deleted) {
if (this.selectedDateTo >= element.dateFrom && this.selectedDateFrom <= element.dateTo) {
palmsFilterDataRang.push({key: element.guestReservationId,val: element});
}
}
}
let palmeArray = [];
let palmetteArray = [];
const palmeWorker = new Worker('../beach.worker',{ type: 'module' });
const palmeRows: any[] = this.palmeRowContainer;
const palmetteRows: any[] = this.palmetteRowContainer;
palmeWorker.postMessage(palmsFilterDataRang);
palmeWorker.onmessage = (result) => {
palmeArray.push(...result.data.palmeArraySorted);
palmetteArray.push(...result.data.palmetteArraySorted);
this.arrayDaPagare.push(...result.data.arrayDaPagare);
this.arrayVoucher.push(...result.data.arrayVoucher);
const beachSeatArray = palmeArray.concat(palmetteArray);
this.searchBeachSeatArray = beachSeatArray;
this.datatableBeachSeatArray = [...this.searchBeachSeatArray];
this.setTableCellStatus(palmeArray,palmeRows);
this.setTableCellStatus(palmetteArray,palmetteRows);
palmeWorker.terminate();
};
// this.beachServiceSubscription.unsubscribe();
await this.loadBeachSeat.dismiss();
});
}
解决方法
好了,我解决了我的问题,在我的服务中,我更改了getBookedPalme()类
getBookedPalme() { return this.beachFirebaseDB.database.ref('beachBookedPalma/'); }
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