c# - ASP.NET CORE Web API - 删除操作未触发(404 未找到)

Question

我有一个简单的 CRUD 操作 Controller 。所有操作都有效，最后一个名为 Delete 的操作是 HTTP DELETE 操作。当我尝试使用示例 url 调用删除操作时:

http://localhost/api/groups/1/attendances/10

然后应用程序返回 404 Not Found 并且没有触发操作。

在我的其他 Controller 中，删除操作正常工作。一个区别是，在其他 Controller 中，我在 Controller 上有一个路由属性，而不是在每个操作上。这是一个问题？

public class AttendancesController : Controller
{
  public AttendancesController(IGroupService groupService, IAttendanceService attendanceService, IPersonService personService, IPersonAttendanceService personAttendanceService)
  {
     //
  }

  [Route("api/groups/{groupId}/[controller]")]
  [HttpGet]
  public IActionResult GetAttendancesForGroup(int groupId)
  {
     //
  }

  [Route("api/groups/{groupId}/[controller]/{date}")]
  [HttpGet]
  public IActionResult GetAttendanceForGroup(int groupId,  DateTime date)
  {
     //
  }

  [Route("api/groups/{groupId}/[controller]")]
  [HttpPost]
  public IActionResult CreateAttendanceForGroup(int groupId, [FromBody] AttendanceCreateDto dto)
  {
     //
  }


  [Route("api/people/{personId}/[controller]")]
  [HttpGet]
  public IActionResult GetAttendancesForPerson(int personId)
  {
    //
  }

  [Route("api/groups/{groupId}/[controller]")]
  [HttpDelete("{id}")]
  public IActionResult Delete(int groupId, int id)
  {
     var group = _groupService.FindById(groupId);
     if (group == null)
        return NotFound();
     var attendance = _attendanceService.GetAttendanceByIdAndGroupId(id,groupId);
     if (attendance == null)
        return NotFound();

     _attendanceService.Delete(attendance);
     return NoContent();
  }
}

Answer 1

I dont understand why in this case [HttpDelete("{id}")] is ignored.

您正在混合路线。

重构类如下。

将公共(public)路由作为路由前缀添加到 Controller 中，并利用路由约束

[Route("api/groups/{groupId}/[controller]")]
public class AttendancesController : Controller {
    public AttendancesController(IGroupService groupService, IAttendanceService attendanceService, IPersonService personService, IPersonAttendanceService personAttendanceService) {
        //
    }


    [HttpGet] // Matches GET api/groups/1/attendances
    public IActionResult GetAttendancesForGroup(int groupId) {
        //
    }


    [HttpGet("{date:datetime}")] //Matches GET api/groups/1/attendances/2017-05-27
    public IActionResult GetAttendanceForGroup(int groupId,  DateTime date) {
        //
    }

    [HttpPost] // Matches POST api/groups/1/attendances
    public IActionResult CreateAttendanceForGroup(int groupId, [FromBody] AttendanceCreateDto dto) {
        //
    }


    [HttpGet("~/api/people/{personId}/[controller]")] // Matches GET api/people/1/attendances
    public IActionResult GetAttendancesForPerson(int personId) {
        //
    }

    [HttpDelete("{id:int}")] // Matches DELETE api/groups/1/attendances/10
    public IActionResult Delete(int groupId, int id) {
        var group = _groupService.FindById(groupId);
        if (group == null)
            return NotFound();
        var attendance = _attendanceService.GetAttendanceByIdAndGroupId(id,groupId);
        if (attendance == null)
            return NotFound();

        _attendanceService.Delete(attendance);
        return NoContent();
    }
}