angularfire2

问题 I have a profile table and a jobs table stored on Firebase Firestore. I am creating an Angular 5 web site. To save on network calls i added the users profile name to each job document. (Not sure if firestore has table linking). So when the user updates him name, I also have to update their job documents (not many). I can get a collection of jobs with the right user id. But i cannot figure out how to iterate through the list and update the one field without using an Observable (one time call).

问题 I have a collection called addons . The collection contains fields namely, name , desc , price and type . I am straight away fetching the data with this.afs.collection<AddOns>('addons'); which returns AngularFirestoreCollection<AddOns> . I have below class file defined for data from Firestore Collection. AddOns.ts export class AddOns{ name?: string; desc?: string; price?: number; type?: string; } export class AddOnId extends AddOns{ aid?: string; } Since I need metadata too from that

问题 I found some explanations about connecting multiple databases from separate app projects with angularfire2. But I would like to access databases within the same project . The documentation stated: // Get the default database instance for an app var database = firebase.database(); // Get a secondary database instance by URL var database = firebase.database('https://testapp-1234.firebaseio.com'); How can I do this with angularfire2? 回答1: I know you got a working answer here : https://github.com

问题 I'm trying to group a AngularFire Firestore Collection (Observable[]) by a field, say userId . I have a collection of items, each with varying userId values, and I need to group them into a multidimensional array. So, convert.. [ {userID:1, color:'blue' }, {userId:2, color:'green'}, {userId:1, color:'orange'} ] into [ [ {userID:1, color:'blue' }, {userId:1, color:'orange'} ], [ {userId:2, color:'green'} ] ] I'm totally new to RxJs, I get how the groupBy operator works when making an

问题 I am creating a PWA and trying to use firebase/angularfire2 v5 to authenticate my users against Facebook or Google (I followed a tutorial that is present in angularfire2 github site). When I use the application in a "normal" browser in a desktop or mobile device everything works fine. The problem starts when I install the application in a mobile device and try to use the authentication (in the manifest.json the property display is set to "standalone"). I end up in a blank page. I tried to

问题 First, this is an Angular2 app. I am just starting out building with Angular2 and Firebase. I am using AngularFire2 as well. I know that my service is working, because I can print out the blog.title just fine right after subscribing. But that is the only place I can get access to the results. Everywhere else it is giving me an undefined error. Whether I use it in the template with {{}} or in the class, I get the same same result. I am not sure what I am doing wrong. I am also new to

问题 I have a collection inside firestore database that consists of several data fields and references. Structure looks like this: firstCollection document sample { name: 'parent', //more fields, second: //reference to document from second collection } secondCollection referenced document sample { title: 'document title', more: 3456, etc: '...' } I have angular application with angularfire2 library included. In one of my html files I need to print data from the first collection including some

问题 I have a structure in my Firebase database like this: --users --v7BwBnUBqJMXCtoOHYE51jXCwhY2: uid --etc The users 'table' gets populated when a user gets authenticated like this: loginFb() { this.af.auth.login({ provider: AuthProviders.Facebook, method: AuthMethods.Popup, }).then( (user) => { this.userOnline(user.uid, 'uid'); this.router.navigate(['/members']); }).catch( (err) => { this.error = err; }) } userOnline(uid, value) { const users = this.af.database.object('/users'); users.update({

问题 I got the simple authentication working with AngularFireAuth but now my routing doesn't work anymore the console.logs show that the 'test' comes before the 'Nice it worked', so what is wrong? (this is mainly just the routing guard out of the documentation) auth-service @Injectable() export class AuthService { user: Observable<firebase.User>; constructor(private firebaseAuth: AngularFireAuth){ this.user = firebaseAuth.authState; } isLoggedIn = false; login(email: string, password: string):

问题 I'm building a web application with Firebase and Angular5. I want to make possible to create/join private rooms (protected by password). Currently I am at the stage of designing the database and can't really see how I can check user entering the correct room password without actually retrieving it from the firebase database (thus making it completely insecure). Should I employ cloud functions for that matter. Or can it be done directly with firebase and I'm missing something? 回答1: You can do