A dynamic default model attributes feature

[michgeek]

We can define default model attributes by declaring them with

class MyModel extends EloquentModel {
    public $attributes = [
        'my_column' => 'default value',
    ];
}

It could be useful to have a dynamic default value by declaring an invokable class that will return a value based on custom logic :

class MyModel extends EloquentModel {
    public $attributes = [
        'my_column' => MyDefaultDynamicValue::class
    ];
}

class MyDefaultDynamicValue implements DefaultModelValue {
    public function __invoke() {
       return auth()->check() ? 'this is a default when I am authenticated' : 'guest default value';
    }
}

What do you think ?

[henzeb]

Not sure, but couldn't you use Attribute mutators for that?

[michgeek]

I believe if you use the mutator it will only be called on mutation, ´MyModel::create()´ will not call the mutator.

[HeavyMedaI]

You can use event listener I think.

[henzeb]

Or place it in the constructor. Or place it in the boot method.

[antonkomarev]

@michgeek I proposed similar idea, but implementation is different, take a look if it fits your requirements:

• Add "default" attribute value in Attribute class #50436