Method processUnionWhere

packages/core/src/EntityManager.ts:497–522

(
    entityName: EntityName<Entity>,
    options:
      | FindOptions<Entity, Hint, any, any>
      | CountOptions<Entity, Hint>
      | UpdateOptions<Entity>
      | DeleteOptions<Entity>,
    type: 'read' | 'update' | 'delete',
  )

  }

  protected async processUnionWhere<Entity extends object, Hint extends string = never>(
    entityName: EntityName<Entity>,
    options:
      | FindOptions<Entity, Hint, any, any>
      | CountOptions<Entity, Hint>
      | UpdateOptions<Entity>
      | DeleteOptions<Entity>,
    type: 'read' | 'update' | 'delete',
  ): Promise<void> {
    if (options.unionWhere?.length) {
      if (!this.driver.getPlatform().supportsUnionWhere()) {
        throw new Error(`unionWhere is only supported on SQL drivers`);
      }

      options.unionWhere = (await Promise.all(
        options.unionWhere.map(branch =>
          this.processWhere(
            entityName,
            branch as FilterQuery<NoInfer<Entity>>,
            options as FindOptions<Entity, Hint>,
            type,
          ),
        ),
      )) as ObjectQuery<Entity>[];
    }
  }

  // this method only handles the problem for mongo driver, SQL drivers have their implementation inside QueryBuilder
  protected applyDiscriminatorCondition<Entity extends object>(