Freezed default value

[alejandrogiubel]

Using reactive form generator with freezed the default values ​​that are set to freezed don't seem to work with reactive form, any ideas?

[vasilich6107]

Hey
Could you provide a repo with reproduction code and clear explanation

[alejandrogiubel]

Here https://github.com/alejandrogiubel/reactive_form_freezed

[just-abdou]

hey @alejandrogiubel , did you find any solution. Thanks.

[alejandrogiubel]

@just-abdou not yet, just waiting for some update.
A workaround is to use initState callback from generated builder

BusinessModelFormBuilder(
      model: business,
      initState: (context, formModel) {
        if (business == null) {
          formModel.activeControl.updateValue(true);
          formModel.authorizedControl.updateValue(false);
          formModel.productsOrServicesControl.updateValue([]);
        }
      },

[Nolomon]

This also leads to returning null for non-nullable disabled fields when calling formModel.submit() although the disabled field has been annotated with @ Default('').
I'm currently making all fields that might be disabled nullable, not sure if this is the recommended practice.

[vasilich6107]

Here https://github.com/alejandrogiubel/reactive_form_freezed

Checking your example
This is the fix

[vasilich6107]

@alejandrogiubel

model: business, => model: business ?? Business()
You need to supply the initial value for the form

[alejandrogiubel]

Yes, you're right, I hadn't thought about that solution (very obvious btw). But in the case where you have a class with several parameters, including some required ones, it doesn't make much sense to define the required parameters at that moment when the idea is to init them when the form is valid. I think the most appropriate thing is that those class parameters that have a default value are initialized in the control with that value.
For example it doesn't make much sense to do:

If the idea is that the price is required but without a default value

[vasilich6107]

Currently it is an edgecase that is not handled so nicely
This results in having nullable values the values required from validators point of voew
This will be addressed in v6 where we have separate Output models
You can check the beta version examples

your idea has an edge case.
Imagine that you have 2 required params
If you wish to preset only one of them - the solution will have hard times to help you
Cause you ll not be able to init form with single value
This is especially tricky with date selection
When the value is required but could not be set to any defaults cause dattime does not have const constructor or it is required to be manually selected by user

[vasilich6107]

Hey @alejandrogiubel
beta version is more stable now
recommended for checking

[alejandrogiubel]

Hi @vasilich6107. I have tested the beta version and the result is very good. Thank you very much for the great work. Currently it is necessary to initialize the model for the form properties to be initialized, but there are cases where you would only want to partially initialize the model and not all the properties. For example

@Rf()
@freezed
class Car with _$Car {
  factory Car({
    @RfControl(
      validators: [RequiredValidator()],
    )
    @Default('Tesla')
    String model,
    @RfControl(
      validators: [RequiredValidator()],
    )
    @Default('Green')
    String color,
    @RfControl(
      validators: [RequiredValidator()],
    )
    @Default(2024)
    int year,
    @RfControl(
      validators: [RequiredValidator()],
    )
    required double price,
  }) = _Car;
}

For the previous model need to do

model: Car(price: 100000),

to initialize the model.
Is there a way without having to initialize the model in the UI that automatically initializes only those properties that have default values ​​in my model?
I know what I'm asking is difficult to achieve, but it would be a good feature. Likewise, the current result is very good.

[vasilich6107]

Hey @alejandrogiubel
There is no need to have default.
This was the main purpose of new approach.

use this code

@Rf(output: true)
@freezed
class Car with _$Car {
  factory Car({
    @RfControl(
      validators: [RequiredValidator()],
    )
    String? model,
    @RfControl(
      validators: [RequiredValidator()],
    )
    String? color,
    @RfControl(
      validators: [RequiredValidator()],
    )
    int? year,
    @RfControl(
      validators: [RequiredValidator()],
    )
    double? price,
  }) = _Car;
}

and check the generated CarOutput model

[alejandrogiubel]

Ok ok that's great. Thanks @vasilich6107