Where clause Google Cloud Firestore in StreamBuilder

Question

I would like to add a where clause on a cloud Firestore query in a streambuilder. My problem is that my list appear then disappear ... Here is my code.

StreamBuilder(
      stream: Firestore.instance
          .collection('nomquetuveux')
          .orderBy('valid').where('valid', isEqualTo: true).snapshots(),
      builder: (context, snapshot) {
        if (!snapshot.hasData) return const Text('Chargement ...');
        return ListView.builder(
            itemCount: snapshot.data.documents.length,
            itemBuilder: (context, index) {
              return Column(children: <Widget>[
                _buildListItem(
                    context,
                    snapshot.data.documents[index]['libelle'],
                    snapshot.data.documents[index]['valid']),
                Divider(),
              ]);
            });
      }),

Answer 1

i think you can try debug it by doing the following.

QuerySnapshot documents = await Firestore.instance
      .collection('nomquetuveux')
      .orderBy('valid').where('valid', isEqualTo: true)
      .getDocuments().catchError(
           (error) {print(error);}
      );

In this way you can see if the error is thrown by the query execution