example-controller.ts

@Controller()
export class BuildController {
  constructor(
    private entityManager: EntityManager,
    private permissions: Permissions,
    private user: User
  ) {}

  @Query()
  async build(args: BuildArgs, info: GraphQLResolveInfo) {
    this.permissions.check(BuildScope.Read);

    // recursively get the requested fields (allows for fragments)
    const nodes = graphqlFields(info) as FieldsObject;

    // match the fields requested to the fields available on the Build entity
    const fields = getMatchingFields(Build, nodes);

    let query = this.entityManager
      .getRepository(Build)
      .createQueryBuilder('build')
      .select(fields.map((field) => `build.${field}`));

    // builds can be queried by their database ID or pipeline name and build ID
    if (args.id) {
      const { id } = fromGlobalId(args.id);

      query = query.where('build.id = :id', { id: parseInt(id, 10) });
    } else {
      query = query.where(
        'build.jobName = :jobName AND build.buildNumber = :buildNumber',
        { jobName: args.jobName, buildNumber: args.buildNumber }
      );
    }

    // we get the raw data back from the DB, so convert into an entity object
    return getNormalObject(await query.getRawOne());
  }
}