if f.Creatable || f.Readable || f.Updatable {
			// use same data type for foreign keys
			if copyableDataType(fieldsMap[f.Name].DataType) {
				f.DataType = fieldsMap[f.Name].DataType
			}
			f.GORMDataType = fieldsMap[f.Name].GORMDataType
			if f.Size == 0 {
				f.Size = fieldsMap[f.Name].Size
			}
			relation.JoinTable.PrimaryFields = append(relation.JoinTable.PrimaryFields, f)