ASP.NET Core 3.x RESTful API学习记录--获取父子关系资源

    //获取父子资源关系实例 要在路由上表示出来父子关系
   [ApiController]
    [Route("api/companies/{companyId}/employees")]
    public class EmployeesController : ControllerBase
    {
        private readonly IMapper _mapper;
        private readonly ICompanyRepository _companyRepository;

        public EmployeesController(IMapper mapper, ICompanyRepository companyRepository)
        {
            _mapper = mapper ?? throw new ArgumentNullException(nameof(mapper));
            _companyRepository = companyRepository ?? throw new ArgumentNullException(nameof(companyRepository));
        }

        [HttpGet]
        public async Task<ActionResult<IEnumerable<EmployeeDto>>>
            GetEmployeesForCompany(Guid companyId,
                [FromQuery] EmployeeDtoParameters parameters)
        {
            if (!await _companyRepository.CompanyExistsAsync(companyId))
            {
                return NotFound();
            }

            var employees = await _companyRepository
                .GetEmployeesAsync(companyId, parameters);

            var employeeDtos = _mapper.Map<IEnumerable<EmployeeDto>>(employees);

            return Ok(employeeDtos);
        }

        [HttpGet("{employeeId}"]
        public async Task<ActionResult<EmployeeDto>>
            GetEmployeeForCompany(Guid companyId, Guid employeeId)
        {
            if (!await _companyRepository.CompanyExistsAsync(companyId))
            {
                return NotFound();
            }

            var employee = await _companyRepository.GetEmployeeAsync(companyId, employeeId);
            if (employee == null)
            {
                return NotFound();
            }

            var employeeDto = _mapper.Map<EmployeeDto>(employee);

            return Ok(employeeDto);
        }

知识来源草根专栏 感谢杨旭大佬