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stream-chat-flutter/packages/stream_chat_persistence/lib/src/converter/map_converter.dart
T
2021-01-28 19:48:54 +05:30

24 lines
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Dart

import 'dart:convert';
import 'package:moor/moor.dart';
/// Maps a [Map] of type [String], [T] into a [String] understood
/// by the sqlite backend.
class MapConverter<T> extends TypeConverter<Map<String, T>, String> {
@override
Map<String, T> mapToDart(fromDb) {
if (fromDb == null) {
return null;
}
return Map<String, T>.from(jsonDecode(fromDb) ?? {});
}
@override
String mapToSql(value) {
if (value == null) {
return null;
}
return jsonEncode(value);
}
}