Mutator doesnt work with arrays, only string

[masterbater]

Not sure if this is bug or I just need to type cast

Works on string

  protected function someAttribute(): Attribute
    {
        return Attribute::make(
            get: fn ($value) => $value,
            set: fn ($value) => 'test'
        );
    }

Doesnt work, when save it omits the field name and use an index key,

  protected function someAttribute(): Attribute
    {
        return Attribute::make(
            get: fn ($value) => $value,
            set: fn ($value) => ['test']
        );
    }
    

Result
{
"0": "test",
"_id": {
"$oid": "67c6c3537cb36e52fd0395b8"
},
"name": "Et vel quos dolore.",
}

Even if I add protected cast to array it makes the field name as index number and shows same result

[GromNaN]

Laravel applies normalizeCastClassResponse on the result of the callback.

If you want to return an array, you have to wrap the array with the field name:

  protected function someAttribute(): Attribute
    {
        return Attribute::make(
            get: fn ($value) => $value,
            set: fn ($value) => ['someAttribute' => ['test']],
        );
    }
    

[masterbater]

Thanks for digging the source code 🙏

Its also in the docs which I have reviewed if this behavior is documented and its there, set array ignores the method to be used as field or column and can set multiple attribute

Each key in the array should correspond with an underlying attribute / database column associated with the model:

https://laravel.com/docs/12.x/eloquent-mutators#mutating-multiple-attributes