Requirement about Eloquent Acessor json serialization

[EronAlves1996]

Given a model with a price field, that maps directly to a database price field, I am creating an Eloquent mutator/acessor for it, like this:

protected function price(): Attribute
    {
        return Attribute::make(
            get: fn(int $value) => $value / 100,
            set: fn(float $value) => $value * 100
        );
    }

But I found that, when I configure this attribute to append it to json serialization like this:

protected $appends = ['price'];

It fails with a exception:

"message": "App\\Models\\Product::App\\Models\\{closure}(): Argument #1 ($name) must be of type string, null given",

Investigating the reason behind this, finally I found that overriding existing fields of Model with acessor/mutator requires enabling the attributes caching like this:

 protected function price(): Attribute
   {
       return Attribute::make(
           get: fn(int $value) => $value / 100,
           set: fn(float $value) => $value * 100
       )->shouldCache();
   }

This should be on the docs, it isn't? In this page, that talks especifically about acessors/mutators on eloquent, and this page that talks about eloquent serialization, I dont found any information about pitfalls in appending existing fields acessors to json.

[shaedrich]

• As far as I know, overriding existing fields was impossible, using the old method—should it still be?
• Assuming, it should, this should not be a matter of documentation but independent of caching.