Question

我有一个名为Issues的模型，该模型的ID和严重性属性是整数，还有一个Issue Controller，该控制器应处理GET请求并按严重性返回所有Issue。由于Dotnet API不支持相同的参数类型（例如int），我该怎么做？

我尝试使用不同的方法名称，例如Get()和GetBySeverity(int severity)，但出现了模棱两可的异常。

这是我的控制器

[Route("api/[controller]")]
[ApiController]
public class IssuesController : ControllerBase
{   

    [HttpGet(Name="issues")]
    public IEnumerable<Issue> GetAllIssues() {
            IssueService service = new IssueService();
            return service.GetIssues();
}

    [HttpGet]
    public IEnumerable<Issue> GetBySeverity([FromQuery(Name="severity")]int severity)
    {
        IssueService service = new IssueService();
        return service.GetIssuesBySeverity(severity);

    }


}

这些是我要开发的api
/api/issues/
和
/api/issues/?severity=1

Answer 1

像这样

//GET api/issues/5
[HttpGet("{id}")]
public Issue GetByRoute([FromRoute(Name="id")] int id)
{
    IssueService service = new IssueService();
    return service.GetIssueById(id);
}   


[HttpGet()]
public Issue GetByQuery([FromQuery(Name="severity")] int severityId)
{
   IssueService service = new IssueService();
   return service.GetIssueById(severityId);
}

Answer 2

存在一个含糊的引用，因为这两个动作都是HttpGet，并且路由引擎无法决定选择哪个路由或您要选择的路由。

Web Api控制器使用HttpVerbs而不是操作/方法名称（例如MVC）进行路由。

我会使用Attribute routing with Http[Verb] attributes。这使用Route("myroute")来定义路线。

// GET api/issues/severity/5
[Route("severity/{severity}")]
[HttpGet()]
public IEnumerable<Issue> GetBySeverity(int severity)
{
    IssueService service = new IssueService();
    return service.GetIssuesBySeverity(severity);
}

// GET api/issues/5
[HttpGet("{id}")]
public Issue Get(int id)
{
    IssueService service = new IssueService();
    return service.GetIssueById(id);
}

以上方法将路由到api/issues/1和api/issues/severity/1。如果要使用查询参数而不是url参数进行映射，则以下方法应该起作用：

// GET api/issues/severity?severity=5
[HttpGet("severity")]
public IEnumerable<Issue> GetBySeverity([FromQuery] int severity)
{
    IssueService service = new IssueService();
    return service.GetIssuesBySeverity(severity);
}

// GET api/issues?id=5
[HttpGet()]
public Issue Get([FromQuery] int id)
{
    IssueService service = new IssueService();
    return service.GetIssueById(id);
}

以上操作将路由到api/issues?id=1和api/issues/severity?severity=1

如何在Web API中调用接受相同参数类型的GET方法

2 个答案: