error in Angular - firebase based chat Application

0
votes

I am creating a chat application by using Angular 6 and Firebase, and I am facing following errors:

Error 1 -

I am getting error in importing FirebaseListObservable from angularfire2/database

import { AngularFireDatabase, FirebaseListObservable} from 'angularfire2/database';

[ts] Module '"/Users/user/Projects/A4/chat-app/node_modules/angularfire2/database/index"' has no exported member 'FirebaseListObservable'.

Error - 2

[ts] Argument of type '{ query: { limitToLast: number; orderByKey: boolean; }; }' is not assignable to parameter of type 'QueryFn'. Object literal may only specify known properties, and 'query' does not exist in type 'QueryFn'.

getMessages(): FirebaseListObservable<ChatMessage[]> {

return this.db.list('messages', {
  query: {
    limitToLast: 25,
    orderByKey: true
  }
});
1
angularangular5angular6

1 Answers

0
votes

chack Angular2 fire has no exported member 'FirebaseListObservable'

You need to change your dependancy in app component as follow:

`import {AngularFireDatabase , FirebaseListObservable} from "angularfire2/database";`

to

`import { AngularFireDatabase, FirebaseListObservable } from 'angularfire2/database-deprecated';`

It will work.