API Reference > imodeljs-backend > Relationships > Relationship Relationship Class Base class for all link table ECRelationships Extends Entity Extended by ElementRefersToElements ElementDrivesElement Implements RelationshipProps Methods Name Description buildConcurrencyControlRequest(opcode: DbOpcode): void Add a request for the locks that would be needed to carry out the specified operation. delete(): void Delete this Relationship from the iModel. insert(): string Insert this Relationship into the iModel. update(): void Update this Relationship in the iModel. getInstance<T extends Relationship<T>>(iModel: IModelDb, criteria: string | SourceAndTarget): T Static onDeletedDependency(_props: RelationshipProps, _iModel: IModelDb): void Static Callback invoked by saveChanges on an ElementDrivesElement relationship when the relationship instance has been deleted. onRootChanged(_props: RelationshipProps, _iModel: IModelDb): void Static Callback invoked by saveChanges on an ElementDrivesElement relationship when its input has changed or is the output of some upstream relationship whose input has changed. Inherited methods Name Inherited from Description forEachProperty(func: PropertyCallback, includeCustom: boolean = true): void Entity Call a function for each property of this Entity. is(otherClass: undefined): boolean Static Entity return whether this Entity class is a subclass of another Entity class Properties Name Type Description sourceId Readonly string targetId Readonly string Inherited properties Name Type Inherited from Description classFullName Accessor ReadOnly string Entity Get the full BIS class name of this Entity in the form "schema:class". classFullName Accessor StaticReadOnly string Entity Get the full BIS class name of this Entity in the form "schema:class" className Accessor ReadOnly string Entity The name of the BIS class associated with this class. id string Entity The Id of this Entity. iModel IModelDb Entity The IModelDb that contains this Entity schema Static undefined Entity The Schema that defines this class. schemaName Accessor ReadOnly string Entity The name of the BIS Schema that defines this class Defined in core/backend/src/Relationship.ts Line 23 Last Updated: 11 June, 2024