import { ColumnMetadata } from '../metadata/ColumnMetadata';
import { RelationMetadata } from '../metadata/RelationMetadata';
import { Subject } from './Subject';

/**
 * Change for insertion or updation of the column of the subject.
 */
export interface SubjectChangeMap {
	/**
	 * Column that needs to be changed.
	 * Either column, either relation must be set in the change.
	 */
	column?: ColumnMetadata;

	/**
	 * Relation that needs to be changed.
	 * Either column, either relation must be set in the change.
	 */
	relation?: RelationMetadata;

	/**
	 * Value needs to be inserted into given column.
	 * This value can also be another subject, when this column has a referenced column.
	 */
	value: Subject | any;
}