fix for empty has_many relation

[ysshir]

tables..

parent

id	name
1	parent1
2	parent2
3	parent3

child

id	parent_id	name
1	1	child1
2	3	child2

grand_child

id	child_id	name
1	1	grand_child1
2	1	grand_child2
3	2	grand_child3
4	2	grand_child4

Models...

class Model_Parent extends Orm\Model {

    protected static $_table_name  = 'parent';
    protected static $_primary_key = ['id'];
    protected static $_properties  = [
        'id',
        'name',
    ];

    protected static $_has_many = [
        'children' => [
            'key_from' => 'id',
            'model_to' => 'Model_Child',
            'key_to'   => 'parent_id',
        ],
    ];
}

class Model_Child extends Orm\Model {

    protected static $_table_name  = 'child';
    protected static $_primary_key = ['id'];
    protected static $_properties  = [
        'id',
        'parent_id',
        'name',
    ];

    protected static $_belongs_to = [
        'parent' => [
            'key_from' => 'parent_id',
            'model_to' => 'Model_Parent',
            'key_to'   => 'id',
        ],
    ];

    protected static $_has_many = [
        'grand_children' => [
            'key_from' => 'id',
            'model_to' => 'Model_GrandChild',
            'key_to'   => 'child_id',
        ],
    ];
}

class Model_GrandChild extends Orm\Model {

    protected static $_table_name  = 'grand_child';
    protected static $_primary_key = ['id'];
    protected static $_properties  = [
        'id',
        'child_id',
        'name',
    ];

    protected static $_belongs_to = [
        'child' => [
            'key_from' => 'child_id',
            'model_to' => 'Model_Child',
            'key_to'   => 'id',
        ],
    ];
}

problems

try {
    $parent = \Model_Parent::query()
                           ->related(['children', 'children.grand_children'])
                           ->order_by('id')
                           ->get();
} catch(Exception $e) {
    // sad :(  
}

[WanWizard]

Looks like a great fix, thanks!