Flutter-Firebase read from firestore multiple fields including array - firebase

Question

Im trying to read all the fields inside my uid1 and uid2 document from firestore. My code crashes because fromJson cant convert imageList from array to List.
Future<List<AppClient>> getClientListResult(List<String> listId) async{
final List<AppClient> clientList = <AppClient>[];
print(listId);
final QuerySnapshot<Map<String, dynamic>> snapshot = await _firestore.collection('clients').where('uid', arrayContainsAny: listId).get();
final List<AppClient> result = snapshot.docs.map((QueryDocumentSnapshot<Map<String, dynamic>> doc) => AppClient.fromJson(doc.data())).toList();
clientList.addAll(result);
return clientList;
}

Answer 1

you can use rxdart to combine two collection from firestore use this plugin rxdart
sample code
StreamBuilder(
stream: CombineLatestStream.list([
firestore
.collection('users')
.doc(data['id'])
.snapshots(),
firestore
.collection('Image')
.doc(data['id'])
.collection('Photos')
.orderBy('timestap')
.snapshots(),
]),
builder: (context, snapshotid) {
// here for the 1st stream
final active = snapshotid.data[0].data();
// here is the for the second stream
final active1 =
snapshotid.data[1].docs[0].data();

Answer 2

Your AppClient class should look something similar to this:
class AppClient {
String address;
String email;
List<String> imageList;
String name;
String price;
double rating;
List<String> uid;
AppClient(
{this.address,
this.email,
this.imageList,
this.name,
this.price,
this.rating,
this.uid});
AppClient.fromJson(Map<String, dynamic> json) {
address = json['address'];
email = json['email'];
imageList = json['imageList'].cast<String>();
name = json['name'];
price = json['price'];
rating = json['rating'];
uid = json['uid'].cast<String>();
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['address'] = this.address;
data['email'] = this.email;
data['imageList'] = this.imageList;
data['name'] = this.name;
data['price'] = this.price;
data['rating'] = this.rating;
data['uid'] = this.uid;
return data;
}
}