Eager load at BaseModel

Question

Currently in a model I do the following to automatically eager load all relationships:

public static $eagerLoad = ['country', 'product', 'membership.package'];

public function newQuery($excludeDeleted = true)
{
    $query = parent::newQuery(true);
    return $query->with(static::$eagerLoad);
}

How could I transport this to the BaseModel?

When I try it returns eloquent call_user_func_array() expects parameter 1 to be a valid callback, first array member is not a valid class name or object

Update:

In my BaseModel I have like this:

public function newQuery($excludeDeleted = true)
{
    if(property_exists(get_class($this), 'eagerLoad'))
    {                       
        $query = parent::newQuery(true);
        return $query->with($this::$eagerLoad);
    }
}

It returns Argument 1 passed to Illuminate\Database\Eloquent\Relations\BelongsTo::__construct() must be an instance of Illuminate\Database\Eloquent\Builder, null given, called in C:\xampp\htdocs\firebolt\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php on line 713 and defined

If I leave empty or return false, it throws call_user_func_array() expects parameter 1 to be a valid callback, first array member is not a valid class name or object

Answer 1

You don't need to use that (the way you are doing it now for eager loading automatically) because all you need to do is only add a protected $with property in your model for example:

protected $with = ['country', 'product', 'membership.package'];

Now your model will automatically eager load the related model provided in $with. So if you do something like this:

$model = Model::find(1);

All the related models will be also eager loaded with this $model object.