DateTime default value

[TheCarpetMerchant]

I'd like to be able to specify DateTime(0) as a default value for DateTime objects. Of course you can't do this because DateTime(0) isn't const. A solution for this would be to specify true as the default value, which would actually generate DateTime(0) in the adapter.

One solution specifying true as the default value, which generates wrong code, but the error raised by the Dart compiler allows you to make the correction manually in the generated file. It's incredibly bad practice, I know. A better alternative is to have these fields be nullable, and use getters and setters. I don't like this approach because it adds unnecessary layers, but whatever works I guess.

Would it be possible to do this in a timely manner ? If not, I'll go with the nullable fields approach. It just annoys me because I'll then practically be stuck with these nullable fields and their accessors forever.

Thanks !

[WasaLordy]

I agree. A general solution would be great. Extending an existing Hive table is currently complicated. When adding a new HiveField which type is a new HiveType, I have to use this nullable approach, because I can not create a const constructor for a HiveObject.

[Rexios80]

What's stopping you from doing this?

@HiveType(typeId: 6)
class ConstructorDefaults {
  ConstructorDefaults({
    DateTime? d,
  }) : d = d ?? DateTime.now();

  @HiveField(3)
  final DateTime d;
}

[TheCarpetMerchant]

What's stopping you from doing this?

@HiveType(typeId: 6)
class ConstructorDefaults {
  ConstructorDefaults({
    DateTime? d,
  }) : d = d ?? DateTime.now();

  @HiveField(3)
  final DateTime d;
}

Like other solutions, it adds different ways of doing the same thing. A good solution for sure compared to the others I proposed !

[Rexios80]

As far as I know that's the only way to achieve a non-const default value. Annotations must be const.