Question

我想在浏览器/ api / announce和/ api / announce / 1中调用。使用以下Get函数获取错误。当我注释掉其中一项或另一项工作时，但是如果我同时拥有这两项功能，则GET无法正常工作。签名有问题还是有其他问题？

   /api/announce
   [HttpGet]
    public List<Announcement> GetAnnouncements()
    {

        Services.Interface.IAnnouncementService service = new Services.Imp.AnnouncementService(_configuration, _logger);

        Announcements announcements = service.GetAnnouncements(1, 1);
        return announcements;

    }

    /api/announce/1
    [HttpGet]
    public ActionResult<Announcement> GetAnnouncements([FromQuery]int ID)
    {

        Services.Interface.IAnnouncementService service = new Services.Imp.AnnouncementService(_configuration, _logger);

        Announcement announcement = service.GetAnnouncement(ID);
        return announcement;

    }

Answer 1

您的路由规则的签名相同，因此将引发此异常：Microsoft.AspNetCore.Mvc.Internal.AmbiguousActionException: Multiple actions matched.

要使框架了解您要调用的动作，您必须在路由方面更加具体。而且，如果要将参数作为路径的一部分传递，则必须将[FromQuery]属性更改为[FromRoute]属性。

示例：

  [HttpGet]
  public IActionResult Test()
  {
    return Ok();
  }

  [HttpGet("{id}")]
  public IActionResult Test([FromRoute]int id)
  {
    return Ok();
  }

Answer 2

这就是我喜欢的方式：

    [HttpGet]
    [ProducesResponseType(typeof(IList<Currency>), 200)]
    public async Task<IActionResult> GetAll()
    {
        return Ok(await _typeService.GetCurrenciesAsync().ConfigureAwait(false));
    }

    [HttpGet("{id}", Name = "GetCurrency")]
    [ProducesResponseType(typeof(Currency), 200)]
    public async Task<IActionResult> Get([FromRoute]int id)
    {
        return Ok(await _expenseService.GetCurrencyAsync(id).ConfigureAwait(false));
    }

我们可以看到这样的东西：

/api/Currency
/api/Currency/{id}

您的基本控制器可能是这样的，其中包括基本路线：

[Authorize(Policy = Common.Security.Policies.ApiUser)]
[Route("api/[controller]")]
[Benchmark, ApiController]
public abstract class BaseController : ControllerBase
{
    protected BaseController()
    { }
}

这里是完整性的控制器构造函数：

public class CurrencyController : BaseController
{
    private readonly IExpenseEntryService _expenseService;
    private readonly ITypeService _typeService;

    public CurrencyController(ITypeService typeService, IExpenseEntryService expenseService)
    {
        _expenseService = expenseService;
        _typeService = typeService;
    }

功能的REST API签名

2 个答案: