@loopback/cli: Controller rest generator with findOne method

Suggestion

Currently, cli generator controller doesn't provide findOne method inside file. Method findOne exists in repository that is associated with controller, so i think i should be generated. For now i must manually add this method to all my controllers

@get('/config/findOne', {
    responses: {
      '200': {
        description: 'Config model instance',
        content: {
          'application/json': {
            schema: getModelSchemaRef(Config, { includeRelations: true }),
          },
        },
      },
    },
  })
  async findOne(
    @param.filter(Config) filter?: Filter<Config>,
  ): Promise<ConfigWithRelations | null> {
    return this.configRepository.findOne(filter);
  }

Use Cases

lb4 controller with REST option should create findOne inside controller (example above)

Examples

In my scenario i have model that i need to find not by id but based on custom filter. It would be much easier when this method can be created out of the box.

Acceptance criteria

TBD - will be filled by the team.