CODEWITHSUNDEEP
firebaseflutterdartgoogle-cloud-firestore
Khalifa Alkhatri
Khalifa Alkhatri

Reputation: 294

Flutter : How to show List of user based in filds?

How to show list of users in FireStore(Firebase Database) Based only in verified Fild ! So if there is non-verified so will not list them in streambuilder, Here my example but I got errors !

Widget verified (){
    return FutureBuilder(
      future: Firestore.instance.collection('users').where('verified ',isEqualTo: 'true').getDocuments(),
      builder: (context, data){
       return ListView(
         children: <Widget>[
       Text('${data.data['verified '].toString()}'),
         ],
       );

      },
    );
  }

The Error is : 

Class 'QuerySnapshot' has no instance method '[]'.
Receiver: Instance of 'QuerySnapshot'
Tried calling: []("verified ")

Upvotes: 0

Views: 212

Answers (1)

GJJ2019
GJJ2019

Reputation: 5172

I generally use stream builder for firestore u can use like that :

return StreamBuilder(
  stream: Firestore.instance
  .collection('users')
  .where('verified ', isEqualTo: 'true')
  .snapshots(),
  builder: (context, data) {
    if (data.hasData) {
      return ListView(
     children: <Widget>[
        Text('${data.data['verified '].toString()}'),
     ],
   );
  }
  return Center(
    child: CircularProgressIndicator(),
 );
  },
);

If u want to use future builder then u have to check for did we got data or not 

return FutureBuilder(
future: Firestore.instance
    .collection('users')
    .where('verified ', isEqualTo: 'true')
    .getDocuments(),
builder: (context, data) {
  if (data.data != null) { //data.connectionState == ConnectionState.done
    return ListView(
      children: <Widget>[
        Text('${data.data['verified '].toString()}'),
      ],
    );
  }
  return CircularProgressIndicator();
},
);

Upvotes: 1

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