Proper way to put attributes in generated properties when using sour generators

[cesarchefinho]

What is the proper way to preserve attributes of observable properties when using source generators?

Example

private string? firstName;

[Required]
[CustomValidatorBlaBla] 
public string? FirstName
{
    get => firstName;
    set
    {
        if (SetProperty(ref firstName, value))
        {
            OnPropertyChanged(nameof(FullName));
            GreetUserCommand.NotifyCanExecuteChanged();
        }
    }
}

private string? lastName;

public string? LastName
{
    get => lastName;
    set
    {
        if (SetProperty(ref lastName, value))
        {
            OnPropertyChanged(nameof(FullName));
            GreetUserCommand.NotifyCanExecuteChanged();
        }
    }
}

public string? FullName => $"{FirstName} {LastName}";

Whne using generators we code as bellow

[ObservableProperty]
[AlsoNotifyChangeFor(nameof(FullName))]
[AlsoNotifyCanExecuteFor(nameof(GreetUserCommand))]
private string? firstName;

[ObservableProperty]
[AlsoNotifyChangeFor(nameof(FullName))]
[AlsoNotifyCanExecuteFor(nameof(GreetUserCommand))]
private string? lastName;

public string? FullName => $"{FirstName} {LastName}";

How I make Required and CustomValudatorBlaBla be applied to FirstName property generetaded?

[Sergio0694]

You can just use the attribute, and it'll be automatically ported over to the generated property 🙂
Note: this only applies to validation attributes.

[cesarchefinho]

But if I have other attributes in viewmodel from anottations namespace like DisplayNameAttribute or DisplayFormatAttribute?

How can I propagate theses attributes using source generators to generated property's ?

[PetarSlavov]

I'm also facing the same problem. As a workaround I can inherit all my custom attributes from ValidationAttribute, but it looks like this only applies to properties not commands.

[michael-hawker]

Yeah, see issue #208

[cesarchefinho]

I resolve this issue using reflection and reading private fields attributes with same name of propretyes and uncaptalize the first letter of name.

[michael-hawker]

Tracked by issue #208