how can i make query in angular with firebase firestore?





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i'm trying to make queries in angular 6 with firebase firestore, i have this code, already i downloaded the packege "npm firebase @angularfire" but doesn't work:



    import { Component } from '@angular/core';

    import { AngularFirestore, AngularFirestoreCollection } from 

    '@angular/fire/firestore';

    import {Lesson} from './models/lesson.model'

    import { Observable} from 'rxjs';

    import {BehaviorSubject} from 'rxjs/BehaviorSubject';

    import {switchMap} from 'rxjs/operators'; 

    import * as moment from 'moment';



    @Component({

      selector: 'app-root',

      templateUrl: './app.component.html',

      styleUrls: ['./app.component.css']

    })

    export class AppComponent {



      lessonRef:AngularFirestoreCollection<Lesson>;

      lesson$: Observable<Lesson>;

      endDate$: BehaviorSubject<Date>;



      constructor(afs:AngularFirestore){

        this.endDate$ = new BehaviorSubject(new Date('2017-12-24'));



        this.lesson$= this.endDate$.pipe(

          switchMap(date=>

          afs.collection<Lesson>('Lesson', ref => 

          ref.where('endDate', "==", date))

          .valueChanges(),

          ),

        );



      }





angular typescript firebase google-cloud-firestore angularfire2







share|improve this question

























  • What doesn't work about the code you shared?

    – Frank van Puffelen
    Nov 24 '18 at 1:22


















-2















i'm trying to make queries in angular 6 with firebase firestore, i have this code, already i downloaded the packege "npm firebase @angularfire" but doesn't work:



    import { Component } from '@angular/core';

    import { AngularFirestore, AngularFirestoreCollection } from 

    '@angular/fire/firestore';

    import {Lesson} from './models/lesson.model'

    import { Observable} from 'rxjs';

    import {BehaviorSubject} from 'rxjs/BehaviorSubject';

    import {switchMap} from 'rxjs/operators'; 

    import * as moment from 'moment';



    @Component({

      selector: 'app-root',

      templateUrl: './app.component.html',

      styleUrls: ['./app.component.css']

    })

    export class AppComponent {



      lessonRef:AngularFirestoreCollection<Lesson>;

      lesson$: Observable<Lesson>;

      endDate$: BehaviorSubject<Date>;



      constructor(afs:AngularFirestore){

        this.endDate$ = new BehaviorSubject(new Date('2017-12-24'));



        this.lesson$= this.endDate$.pipe(

          switchMap(date=>

          afs.collection<Lesson>('Lesson', ref => 

          ref.where('endDate', "==", date))

          .valueChanges(),

          ),

        );



      }





angular typescript firebase google-cloud-firestore angularfire2







share|improve this question

























  • What doesn't work about the code you shared?

    – Frank van Puffelen
    Nov 24 '18 at 1:22














-2












-2








-2








i'm trying to make queries in angular 6 with firebase firestore, i have this code, already i downloaded the packege "npm firebase @angularfire" but doesn't work:



    import { Component } from '@angular/core';

    import { AngularFirestore, AngularFirestoreCollection } from 

    '@angular/fire/firestore';

    import {Lesson} from './models/lesson.model'

    import { Observable} from 'rxjs';

    import {BehaviorSubject} from 'rxjs/BehaviorSubject';

    import {switchMap} from 'rxjs/operators'; 

    import * as moment from 'moment';



    @Component({

      selector: 'app-root',

      templateUrl: './app.component.html',

      styleUrls: ['./app.component.css']

    })

    export class AppComponent {



      lessonRef:AngularFirestoreCollection<Lesson>;

      lesson$: Observable<Lesson>;

      endDate$: BehaviorSubject<Date>;



      constructor(afs:AngularFirestore){

        this.endDate$ = new BehaviorSubject(new Date('2017-12-24'));



        this.lesson$= this.endDate$.pipe(

          switchMap(date=>

          afs.collection<Lesson>('Lesson', ref => 

          ref.where('endDate', "==", date))

          .valueChanges(),

          ),

        );



      }





angular typescript firebase google-cloud-firestore angularfire2







share|improve this question
















i'm trying to make queries in angular 6 with firebase firestore, i have this code, already i downloaded the packege "npm firebase @angularfire" but doesn't work:



    import { Component } from '@angular/core';

    import { AngularFirestore, AngularFirestoreCollection } from 

    '@angular/fire/firestore';

    import {Lesson} from './models/lesson.model'

    import { Observable} from 'rxjs';

    import {BehaviorSubject} from 'rxjs/BehaviorSubject';

    import {switchMap} from 'rxjs/operators'; 

    import * as moment from 'moment';



    @Component({

      selector: 'app-root',

      templateUrl: './app.component.html',

      styleUrls: ['./app.component.css']

    })

    export class AppComponent {



      lessonRef:AngularFirestoreCollection<Lesson>;

      lesson$: Observable<Lesson>;

      endDate$: BehaviorSubject<Date>;



      constructor(afs:AngularFirestore){

        this.endDate$ = new BehaviorSubject(new Date('2017-12-24'));



        this.lesson$= this.endDate$.pipe(

          switchMap(date=>

          afs.collection<Lesson>('Lesson', ref => 

          ref.where('endDate', "==", date))

          .valueChanges(),

          ),

        );



      }





angular typescript firebase google-cloud-firestore angularfire2




angular typescript firebase google-cloud-firestore angularfire2






share|improve this question















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edited Nov 24 '18 at 1:20









Frank van Puffelen

246k31392420




246k31392420










asked Nov 24 '18 at 0:28









Steven GiraldoSteven Giraldo

516




516













  • What doesn't work about the code you shared?

    – Frank van Puffelen
    Nov 24 '18 at 1:22



















  • What doesn't work about the code you shared?

    – Frank van Puffelen
    Nov 24 '18 at 1:22

















What doesn't work about the code you shared?

– Frank van Puffelen
Nov 24 '18 at 1:22





What doesn't work about the code you shared?

– Frank van Puffelen
Nov 24 '18 at 1:22












1 Answer
1






active

oldest

votes


















0














You're not defining ref anywhere. As the AngularFire documentation says:




Queries are created by building on the firebase.firestore.CollectionReference.




You'll need to define a CollectionReference as shown in the Firestore documentation:



let ref = firebase.firestore().collection("Lessons");


Then you can define a AngularFire2 collection with a query on top of that with the code you have already.






share|improve this answer
























  • but where do i must type it?

    – Steven Giraldo
    Nov 24 '18 at 15:49











  • Before where you first use ref, so e.g. on a separate line right before ` this.lesson$= this.endDate$.pipe(`

    – Frank van Puffelen
    Nov 24 '18 at 18:04












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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









0














You're not defining ref anywhere. As the AngularFire documentation says:




Queries are created by building on the firebase.firestore.CollectionReference.




You'll need to define a CollectionReference as shown in the Firestore documentation:



let ref = firebase.firestore().collection("Lessons");


Then you can define a AngularFire2 collection with a query on top of that with the code you have already.






share|improve this answer
























  • but where do i must type it?

    – Steven Giraldo
    Nov 24 '18 at 15:49











  • Before where you first use ref, so e.g. on a separate line right before ` this.lesson$= this.endDate$.pipe(`

    – Frank van Puffelen
    Nov 24 '18 at 18:04
















0














You're not defining ref anywhere. As the AngularFire documentation says:




Queries are created by building on the firebase.firestore.CollectionReference.




You'll need to define a CollectionReference as shown in the Firestore documentation:



let ref = firebase.firestore().collection("Lessons");


Then you can define a AngularFire2 collection with a query on top of that with the code you have already.






share|improve this answer
























  • but where do i must type it?

    – Steven Giraldo
    Nov 24 '18 at 15:49











  • Before where you first use ref, so e.g. on a separate line right before ` this.lesson$= this.endDate$.pipe(`

    – Frank van Puffelen
    Nov 24 '18 at 18:04














0












0








0







You're not defining ref anywhere. As the AngularFire documentation says:




Queries are created by building on the firebase.firestore.CollectionReference.




You'll need to define a CollectionReference as shown in the Firestore documentation:



let ref = firebase.firestore().collection("Lessons");


Then you can define a AngularFire2 collection with a query on top of that with the code you have already.






share|improve this answer













You're not defining ref anywhere. As the AngularFire documentation says:




Queries are created by building on the firebase.firestore.CollectionReference.




You'll need to define a CollectionReference as shown in the Firestore documentation:



let ref = firebase.firestore().collection("Lessons");


Then you can define a AngularFire2 collection with a query on top of that with the code you have already.







share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 24 '18 at 1:25









Frank van PuffelenFrank van Puffelen

246k31392420




246k31392420













  • but where do i must type it?

    – Steven Giraldo
    Nov 24 '18 at 15:49











  • Before where you first use ref, so e.g. on a separate line right before ` this.lesson$= this.endDate$.pipe(`

    – Frank van Puffelen
    Nov 24 '18 at 18:04



















  • but where do i must type it?

    – Steven Giraldo
    Nov 24 '18 at 15:49











  • Before where you first use ref, so e.g. on a separate line right before ` this.lesson$= this.endDate$.pipe(`

    – Frank van Puffelen
    Nov 24 '18 at 18:04

















but where do i must type it?

– Steven Giraldo
Nov 24 '18 at 15:49





but where do i must type it?

– Steven Giraldo
Nov 24 '18 at 15:49













Before where you first use ref, so e.g. on a separate line right before ` this.lesson$= this.endDate$.pipe(`

– Frank van Puffelen
Nov 24 '18 at 18:04





Before where you first use ref, so e.g. on a separate line right before ` this.lesson$= this.endDate$.pipe(`

– Frank van Puffelen
Nov 24 '18 at 18:04




















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