CODEWITHSUNDEEP
firebasefluttergoogle-cloud-firestore
Nikhil27bYt
Nikhil27bYt

Reputation: 19

Flutter Firebase - Retrieve array & map data

This is my dataset :

Firebase dataset

I am trying to get this type of data in my app 1st I use an array and in the array i add map data and my value but i don't get any data.

My code

child: StreamBuilder(
        stream: FirebaseFirestore.instance.collection("coin").snapshots(),
        builder: (context, snapshot) {
          if (!snapshot.hasData) {
            return Loder();
          }
          return ListView.builder(
            itemCount: snapshot.data.document.length,
            itemBuilder: (BuildContext context, int index) {
              Map<dynamic, dynamic> map = snapshot.data.documents[index];
              return ListTile(
                title: Text(map.values.toList()[index]["coinlink"]),
              );
            },
          );
        }),

EDIT 1

I got this error I need data from coinlink title and img

The following NoSuchMethodError was thrown building StreamBuilder<QuerySnapshot<Map<String, dynamic>>>(dirty, state: _StreamBuilderBaseState<QuerySnapshot<Map<String, dynamic>>, AsyncSnapshot<QuerySnapshot<Map<String, dynamic>>>>#29591): Class '_JsonQuerySnapshot' has no instance getter 'document'.

How to get this type of data?

Upvotes: 1

Views: 3141

Answers (1)

erluxman
erluxman

Reputation: 19415

You need column inside list of display multiple coinLinks.

return ListView.builder(
                itemCount: snapshot.data.document.length,
                itemBuilder: (BuildContext context, int index) {
                  Map<dynamic, dynamic> map = snapshot.data.documents[index];
                  final  coinLinks = map["coinLink"] as List<Map<String,dynamic>>;
                  return ListTile(
                    title: Column(
                          children: coinLinks.map((coinLink){
                                  return Text(coinLink["title"]);
                             }).toList()
                     ),
                  );
                },
              );

Upvotes: 0

Related Questions