ForeignKey:   relation.Polymorphic.PolymorphicType,
		})

		primaryKeyField := schema.PrioritizedPrimaryField
		if len(relation.foreignKeys) > 0 {
			if primaryKeyField = schema.LookUpField(relation.foreignKeys[0]); primaryKeyField == nil || len(relation.foreignKeys) > 1 {
				schema.err = fmt.Errorf("invalid polymorphic foreign keys %+v for %v on field %s", relation.foreignKeys,
					schema, field.Name)
			}