schema.Relationships.Many2Many = append(schema.Relationships.Many2Many, relation)
		}
	}

	return relation
}

// hasPolymorphicRelation check if has polymorphic relation
// 1. `POLYMORPHIC` tag
// 2. `POLYMORPHICTYPE` and `POLYMORPHICID` tag
func hasPolymorphicRelation(tagSettings map[string]string) bool {
	if _, ok := tagSettings["POLYMORPHIC"]; ok {
		return true
	}