This could initially was working but after firebase update, it is now giving me this error. I have added asterisks to the part giving the error. The error message has been added beneath the code.
import 'package:cloud_firestore/cloud_firestore.dart';
class Record {
final String name;
final int totalVotes;
final DocumentReference reference;
Record.fromMap(Map<String, dynamic> map, {this.reference})
: assert(map['name'] != null),
assert(map['totalVotes'] != null),
name = map['name'],
totalVotes = map['totalVotes'];
Record.fromSnapshot(DocumentSnapshot snapshot)
: this.fromMap(**snapshot.data**, reference: snapshot.reference);
@override
String toString() => "Record<$name:$totalVotes>";
}
class Voters {
String uid;
String voteId;
String markedVoteOption;
}
The argument type 'Map<String, dynamic> Function()' can't be assigned to the parameter type 'Map<String, dynamic>'.
Try the following:
Record.fromSnapshot(DocumentSnapshot snapshot)
: this.fromMap(snapshot.data(), reference: snapshot.reference);
data()
is a method:
/// Contains all the data of this [DocumentSnapshot].
Map<String, dynamic> data() {
return _CodecUtility.replaceDelegatesWithValueInMap(
_delegate.data(), _firestore);
}
that returns a Map<String, dynamic>
It's because DocumentSnapshot.data() is a function that returns Map<String, dynamic>
.
So, the answer is:
Record.fromSnapshot(DocumentSnapshot snapshot)
: this.fromMap(snapshot.data(), reference: snapshot.reference);
Apparently all that was needed was parentheses on the maps
import 'package:cloud_firestore/cloud_firestore.dart';
class Record {
final String name;
final int votes;
final DocumentReference reference;
Record.fromMap(Map<String, dynamic> map(), {this.reference})
: assert(map()['name'] != null),
assert(map()['votes'] != null),
name = map()['name'],
votes = map()['votes'];
Record.fromSnapshot(DocumentSnapshot snapshot)
: this.fromMap(snapshot.data, reference: snapshot.reference);
@override
String toString() => "Record<$name:$votes>";
}
This is how I solved it.
import 'package:cloud_firestore/cloud_firestore.dart';
class Record {
final String name;
final int totalVotes;
final DocumentReference reference;
Record.fromMap(Map<String, dynamic> map(), {this.reference})
: assert(map()['name'] != null),
assert(map()['totalVotes'] != null),
name = map()['name'],
totalVotes = map()['totalVotes'];
Record.fromSnapshot(DocumentSnapshot snapshot)
: this.fromMap(snapshot.data, reference: snapshot.reference);
@override
String toString() => "Record<$name:$totalVotes>";
}
class Voters {
String uid;
String voteId;
String markedVoteOption;
}
/// Contains all the data of this [DocumentSnapshot].
Map<String, dynamic> data() {
return _CodecUtility.replaceDelegatesWithValueInMap(
_delegate.data(), _firestore);
}
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