string is not subtype of double

[Panca6]

price.dart

@DataClassName('Price')
class PriceTable extends Table {
  IntColumn get id => integer()();
  RealColumn get price => real()();
  @override
  Set<Column> get primaryKey => {id};
}

the error occured when i call
Price.fromJson(json);

here is the json format :

{
  "id": 1,
  "price": "10000.00"
}

i know the error but how can i parse string to double? without writing my own custom UserRowClass(from json and to json)?

[simolus3]

You could apply a type converter that only does its work for the JSON conversion to the column:

class DoubleAsStringInJson extends TypeConverter<double, double>
    with JsonTypeConverter2<double, double, String> {
  const DoubleAsStringInJson();

  @override
  double fromJson(String json) => double.parse(json);

  @override
  String toJson(double value) => value.toString();

  @override
  double fromSql(double fromDb) => fromDb;

  @override
  double toSql(double value) => value;
}

You can then apply it with RealColumn get price => real().map(const DoubleAsStringInJson())().