event
Class Parameter Assigned
A ParameterKey was directly assigned to an ObjectClass.
EventStatus: Implemented in api-v1
Purpose
Records a new direct ClassParameter binding — a steward saying “this class has this parameter”. ClassParameter.bind always creates with assignmentOrigin: 'direct'; rendered (inherited) rows are materialized by the template sync, not by this event.
Assignment changes which object classes contribute to a Revit projection’s derived category set, which is why the projection side listens.
Payload
Envelope is { name, occurredAt, payload } (apps/api-v1/src/modules/shared/domain/events/DomainEvent.ts). All four ClassParameter* events share one payload type.
| Field | Type | Meaning |
|---|---|---|
classParameterId | ClassParameterId | The assignment record |
objectClassId | ObjectClassId | Class the parameter was assigned to |
parameterKeyId | ParameterKeyId | Canonical key being assigned |
allowedValueCount | number (optional) | Only populated on ClassParameterAllowedValuesReplaced |
Raised by
ClassParameter.bind—apps/api-v1/src/modules/bim-ontology/core/domain/class-parameter/ClassParameter.tsUpsertClassParameterUseCase.upsertClassParameter—apps/api-v1/src/modules/bim-ontology/core/application/use-cases/ClassParameterUseCases.ts.BulkAssignClassParametersUseCaseloops over the same use case- HTTP: upsertClassParameter, assignClassParameters
Consumers
Two handlers in adapters/inbound/events/, both registered in bim-ontology.composition.ts:
| Handler | Effect |
|---|---|
ClassParameterDerivedRevitCategoryHandler | PersistDerivedRevitCategorySetsUseCase for the event’s parameterKeyId — refreshes which classes contribute to the key’s Revit projection |
RenderedParamTemplatesSyncHandler | SyncObjectClassRenderedParamTemplatesUseCase for the affected class subtree — re-materializes inherited assignments |