Multiple IQueryable in one controller? - asp.net

Question

I have a controller for my entire database, the code is below:
public class YogaController : DbDataController<Yoga.Models.YOGAEntities>
{
public YogaController()
{
}
public IQueryable<Yoga.Models.Action> GetActions(int BugId)
//GetActions retrieves "actions" table from the db, not Actions in MVC term
{
return DbContext.Actions.Where(x => x.FK_BugsID == BugId);
}
public IQueryable<Yoga.Models.Label> GetRequiredLabels()
{
return DbContext.Labels.Where(x => x.IsRequired == true);
}
public IQueryable<Yoga.Models.Role> GetRoles()
{
return DbContext.Roles;
}
public IQueryable<Role> GetRoles2() //TODO: finish this
{
return DbContext.Roles.Where(x => x.RoleID == 1);
}
public IQueryable<Tag> GetTags(int actionid)
{
return DbContext.Tags.Where(x => x.J_Tags.Any(y => y.FK_ActionID == actionid));
}
}
As you can see I have multiple IQueryable in one controller, each querying a different table. Is it something that's forbidden? Because when I go to localhost/api/Yoga/GetActions or localhost/api/Yoga/GetRequiredLabels I get the error message:
Multiple actions were found that match the request:
System.Linq.IQueryable`1[Yoga.Models.Label] GetRequiredLabels() on type Yoga.Controllers.YogaController
System.Linq.IQueryable`1[Yoga.Models.Role] GetRoles() on type Yoga.Controllers.YogaController
System.Linq.IQueryable`1[Yoga.Models.Role] GetRoles2() on type Yoga.Controllers.YogaController
When I disable all but one IQueryable, the results came out fine.
I have googled for similar issues and checked my routing settings, there are no conflicts in controller path and names.
My Routes (default generated):
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
//routes.MapRoute(
// name: "Default",
// url: "{controller}/{action}/{id}",
// defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
Any ideas?

Answer 1

MVC4 is probably matching your HTTP Verb (Get) against all methods with names starting with 'Get' and no parameters. Try forcing the action name:
[ActionName("GetRequiredLabels")]
public IQueryable<Yoga.Models.Label> GetRequiredLabels()
...
[ActionName("GetActions")]
public IQueryable<Yoga.Models.Action> GetActions(int BugId)
... // etc
EDIT:
Based on the routes you pasted and your controller, I think your routes should be:
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{action}/{id}",
defaults: new { id = RouteParameter.Optional }
);
}
i.e. it should have the {action} in there. The default MVC4 route would work if you only had a single 'Get' method. Since you have multiple, you'll have to force it to pick the action based on the route.