Simple question but I have issues with it.
We have simple route

```
profile_api_info:
    pattern:  /api/info/{apiID}
    defaults: { _controller: SiteProfileBundle:Api:info, apiID: null}

```

When we use such url as 

```
http://some.site/api/info/123

```

we'll get proper result of controller.
But when we use this one

```
http://some.site/api/info/

```

we'll have an error, why?

```
No route found for "GET /profile/api/info/" 

```

We'll have already setuped 'defaults' for our 'apiID' but symfony2 says that no route. Can someone suggest how to deal with it? I want routes

```
http://some.site/api/info
http://some.site/api/info/

```

have the same controller as 

```
http://some.site/api/info/123

```

but with 'apiID' = null or false, no matter.