@classmethod
def where(cls, **filters):
    """
        Shortcut for smart_query() method
        Example 1:
          Product.where(subject_ids__in=[1,2], grade_from_id=2).all()

        Example 2:
          filters = {'subject_ids__in': [1,2], 'grade_from_id': 2}
          Product.where(**filters).all()

        Example 3 (with joins):
          Post.where(public=True, user___name__startswith='Bi').all()
        """
    return cls.smart_query(filters)
