Is this compatible with the flutter freezed package?

[benji-farquhar]

I haven't managed to map my freezed objects successfully. Is this possible at this stage?

[smotastic]

Hi, so I tried it and I saw 2 problems.
First is that my analyzer dependency is too old to work with the analyzer dependency of freezed.
Which is no problem, I can just update my dependency which I should do anyway.
To test it, I just used an older version of freezed which still has the old analyzer dependency (^0.14.0-nullsafety.0)

The other problem though seems to be in the implementation of my mapper.
For these models

@freezed
class Person with _$Person {
  Person._();
  factory Person(String name, int age) = _Person;
}

@freezed
class PersonModel with _$PersonModel {
  factory PersonModel(String name, int age) = _PersonModel;
}

And this mapper

@Mapper()
abstract class PersonMapper {
  Person fromModel(PersonModel model);
}

When running the build_generator I get the following error.

[SEVERE] smartstruct_generator:mapper on lib/mapper.dart:

Bad state: No element

Gonna have to check this out.
I think it has something to do with the constructor, as my mapper is just looking for the first non factory constructor.

return outputClass.constructors.where((element) => !element.isFactory).first;

I'll try to find some time in the next days

[benji-farquhar]

Cool, thanks for looking into it :)

[andrew-tpz]

Hi, any progress with that?

I use smartstruct v1.2.4+1 and freezed: v1.0.2+1.
Mapper file is generated withput errors, but generated code is wrong, because Person is immutable.

class PersonMapperImpl extends PersonMapper {
  PersonMapperImpl() : super();

  @override
  Person fromModel(PersonModel model) {
    final person = Person();
    person.name = model.name;
    person.age = model.age;
    person.copyWith = model.copyWith;
    return person;
  }
}

[smotastic]

Hi @andrew-tpz , unfortunately not yet.
I'm still trying to maintain smartstruct, but currently, this means only reviewing open pull requests, and trying to help out as much as I can with the system in place.
I hope this will change at the beginning of next year, as I still have lots of plans for this library, but no time as always.

[smotastic]

Hi,
I merged a fix (#47), so you should be able to use freezed with smartstruct now (in the next release which will be coming soon).
As @andrew-tpz noted, the wrong constructor was used, so now the constructor with the most parameters is used. In the case of freezed, one of the given factory constructors.

Another problem was the mapping of the copyWith Method, this has to be ignored manually.
See the example on how to use freezed (https://github.com/smotastic/smartstruct/tree/develop/example/lib/freezed) or the README.

As I didn't use freezed much, I hope most of it will work now.
If you find any more problems please feel free to open another issue.