当 Id 是字符串时，路由到多个 GETS 失败

Question

我试过其他类似问题的答案，但我仍然遇到这个问题。我们正在实施 ASP.NET REST API，设置如下：

[Authorize]
[Route("api/cars/{id:int}")]
public HttpResponseMessage Get(int id)
{
    //Some stuff
}

[Authorize]
[Route("api/cars/{brand?}/{color?}")]
public HttpResponseMessage GetBySource(string brand = null, string color = null)
{
    //Some stuff
}

由于 Get(int id) 方法上的 int 约束，路由工作正常，它支持如下调用：

{host}/api/cars/1
{host}/api/cars/toyota
{host}/api/cars/toyota/blue
{host}/api/cars?brand=toyota&color=blue

现在有支持字符串 ID 的新要求以下 "logical" 更改（删除 Id 上的 int 约束）破坏了设置：

[Authorize]
[Route("api/cars/{id}")]
public HttpResponseMessage Get(string id)
{
    //Some stuff
}

现在之前的大部分调用都路由到 Get(string id):

{host}/api/cars/1             //---> Works OK
{host}/api/cars/toyota        //---> "toyota" is the car Id instead of brand (No OK)
{host}/api/cars?brand=toyota  //---> "brand=toyota" is the car Id instead of parsing the brand (No OK)
{host}/api/cars/toyota/blue   //---> (404 Error)
{host}/api/cars?brand=toyota&color=blue  //---> (404 Error)

毕竟有道理。 [Route("api/cars/{id}")] 将 cars 之后的任何字符串视为 Id，并期望像 [Route("api/cars/{id}/xxx/{yyy}")] 这样的路线满足其他请求。但是把一个唯一的Id放在其他过滤器的前面是没有意义的。

我们正在评估仅在确实需要时才更改我们以前的设计。所以我的问题是：我们可以做出以下设计吗？:

{host}/api/cars/A100T50
{host}/api/cars/toyota
{host}/api/cars/toyota/blue
{host}/api/cars?brand=toyota&color=blue

如果不是，您会推荐我使用哪种设计？

我的路由配置很简单：

public static void Register(HttpConfiguration config)
{
    config.MapHttpAttributeRoutes();
}

提前感谢您的指导

Answer 1

你能把这两种方法结合起来吗？

[Authorize]
//edit: add another route so that it recognizes id 
[Route("api/cars/{id}")]
[Route("api/cars")]
public HttpResponseMessage Get(string brand = "", string color = "", string id = "")
{
    //example to get from database based on whichever parameter provided 
    using(var ctx = new DbContext())
    {
        var cars = ctx.Cars
                      .Where(car => String.IsNullOrEmpty(id) || car.Id == id 
                      && String.IsNullOrEmpty(color) || car.Color == color
                      && String.IsNullOrEmpty(brand) || car.Brand == brand);
    //Some stuff
}

你可以打电话给

{host}/api/cars/AT100
{host}/api/cars?id=AT100
{host}/api/cars?color=black

当 Id 是字符串时，路由到多个 GETS 失败

Routing to multiple GETS fails when the Id is a string

c#

rest

asp.net-web-api-routing