TAbstractGenerator.GenerateId Method
Generates a new identifier value for the given entity before it is inserted into the database.
Syntax
Unit: Aurelius.Id.AbstractGenerator
function TAbstractGenerator.GenerateId(Entity: TObject; Performer: ICommandPerformer): Variant; virtual; abstract;Parameters
| <-> | Parameter | Type | Description |
|---|---|---|---|
| Entity | TObject | The entity object for which a new identifier is being generated. | |
| Performer | ICommandPerformer | An ICommandPerformer that can execute SQL statements against the database, available for generators that need to query a sequence or other database object. |
Returns
The new identifier value to assign to the entity, or an unassigned Variant (Unassigned) when the identifier will be generated by the database itself (e.g., an identity column). Returning Unassigned causes Aurelius to skip the identifier column on INSERT and call RetrieveIdAfterInsert afterwards.