CODEWITHSUNDEEP
fluttergoogle-cloud-firestore
Alexis Leloup
Alexis Leloup

Reputation: 250

How to store the Firestore data in a list of objects?

I want to get all document in my firestore collection and then create Artist objects with it. I can get the data from firestore and display it, but when I add an artist to my list it remains empty

class Artist{
  late String id;
  late String name;
  late String year;
  Artist(this.id, this.name, this.year);
}

class ArtistsService{
  Future getAllArtists() async {
    Future<QuerySnapshot<Map<String, dynamic>>> firestoreResult = FirebaseFirestore.instance.collection('data').get();

    late List<Artiste> localList = [];

    FirebaseFirestore.instance.collection('data').get().then((docSnapshot) {
      for (var i = 1; i <= docSnapshot.docs.length -1; i++) {
        String id = docSnapshot.docs[i].id;
        String annee = docSnapshot.docs[i]["annee"].toString();
        String name = docSnapshot.docs[i]["artistes"].toString();
        print(id); // It works
        print(annee); // It works
        print(name); // It works
        localList.add(new Artiste(id,name,annee)); // It don't works
      }
    });
    print("LIST : " + localList.toString());


    return firestoreResult;
  }
}

Data are print but list is empty, why?

I/flutter (27623): 3t36pe5ipPXxkhfh2lz7
I/flutter (27623): 2004
I/flutter (27623): Redrama

I/flutter (27623): 6lZTV9gu0DIlXCgxjVWu
I/flutter (27623): 2004
I/flutter (27623): Lars Horntveth

...
I/flutter (27623): LIST : []

Upvotes: 0

Views: 102

Answers (1)

HeIsDying
HeIsDying

Reputation: 315

try change the line where you mention It don't works to the code below. By doing this you are actually storing the value you get from docSnapshot into the variable of class Artiste

localList.add(
   new Artiste(
    id : id, // this id is the id that you get from docSnapshot
    name : name, // this name is the name that you get from docSnapshot
    year : annee, // this annee is the anne that you get from docSnapshot
   )
);

Upvotes: 1

Related Questions