Method get_prep_lookup

django/contrib/postgres/fields/ranges.py:218–221

(self)

class RangeContains(lookups.DataContains):
    def get_prep_lookup(self):
        if not isinstance(self.rhs, (list, tuple, Range)):
            return Cast(self.rhs, self.lhs.field.base_field)
        return super().get_prep_lookup()


RangeField.register_lookup(RangeContains)