this is my users collection in cloud fire store:
this is the function that gets users from users collection in firestore
Stream<QuerySnapshot> fetchUsersInSearch() { return Firestore.instance.collection('users').snapshots(); } i use this method
final emailResults = snapshot.data.documents .where((u) => u['email'].contains(query)); in the following streamBuilder to fetch users by their email.
i have this streamBuilder to populate the data on screen
return StreamBuilder<QuerySnapshot>( stream: DatabaseService().fetchUsersInSearch(), builder: (context, AsyncSnapshot<QuerySnapshot> snapshot) { final emailResults = snapshot.data.documents .where((u) => u['email'].contains(query)); if (!snapshot.hasData) { return Container( color: Theme.of(context).primaryColor, child: Center( child: Text( '', style: TextStyle( fontSize: 16, color: Theme.of(context).primaryColor), ), ), ); } if (emailResults.length > 0) { return Container( color: Theme.of(context).primaryColor, child: ListView( children: emailResults .map<Widget>((u) => GestureDetector( child: Padding( padding: const EdgeInsets.all(0.1), child: Container( padding: EdgeInsets.symmetric(vertical: 5), decoration: BoxDecoration( color: Theme.of(context).primaryColor, border: Border( bottom: BorderSide( width: 0.3, color: Colors.grey[50]))), child: ListTile( leading: CircleAvatar( backgroundColor: Theme.of(context).primaryColor, backgroundImage: NetworkImage(u['userAvatarUrl']), radius: 20, ), title: Container( padding: EdgeInsets.only(left: 10), child: Column( crossAxisAlignment: CrossAxisAlignment.start, children: [ Text(u['email'], style: TextStyle( fontSize: 16, color: Theme.of(context) .accentColor), overflow: TextOverflow.ellipsis), SizedBox( height: 5, ), ], ), ), ), ), ), onTap: () { showUserProfile(u['id']); }, )) .toList(), ), ); } else { return Container( color: Theme.of(context).primaryColor, child: Center( child: Text( 'No results found', style: TextStyle( fontSize: 16, color: Theme.of(context).accentColor, ), ), ), ); } }); this is working perfectly and fetching users inside a listView by their email...
p.s: the (query) is a string i type in a seach bar.
how can i make a query to fetch users by their otherUsernames...the second field in the screenshot of the users collection ?!
i tried this:
final otherUsernamesResults = snapshot.data.documents .where((u) => u['otherUsernames'].contains(query)); but its returning this error:
The method 'contains' was called on null. Receiver: null Tried calling: contains("#username1") what am i doing wrong here ?!!
any help would be much appreciated..
