Is eager loading not compatible with custom collections in laravel?

Question

Laravel

If the model is eager loaded

public function companies()
{  
    $this->load('contacts.companies')
    // ...
}

and at the same time, a method for creating a custom collection is defined in the Contact model

public function newCollection(array $models = array())
{
        return new ContactCollection($models);
}

We get an Exception telling us that a Collection is expected, but a ContactCollection comes

Type error: Argument 2 passed to Illuminate\Database\Eloquent\Relations\BelongsToMany::match() must be an instance of Illuminate\Database\Eloquent\Collection, instance of App\Collections\ContactCollection given, called in /var/www/laravel/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php on line 678

Isn't eager loading compatible with custom collections?
(laravel 5.2)

Answer 1

You need to inherit ContactCollectionfrom Illuminate\Database\Eloquent\Collection. Most likely, you are Illuminate\Support\Collectioninherited from or not inherited at all.

Answer 2

Yes, indeed, I inherited it from \Illuminate\Support\Collectionand there was a mistake. Thanks to all