odata路由无法正常工作

Question

This is my first OData application with asp.net MVC and i am not able to make it work. I need to return a single Summary object from the SummaryController , but facing an issue.

routing configuration -

public static IEdmModel CreateEdmModel()
{
    ODataConventionModelBuilder modelBuilder = new ODataConventionModelBuilder();
    modelBuilder.EntitySet<Summary>("Summary");
    return modelBuilder.GetEdmModel();
}

public static void Register(HttpConfiguration config)
{
    config.Routes.MapODataRoute("OData", "odata", CreateEdmModel());
    config.EnableQuerySupport();    
    config.EnableSystemDiagnosticsTracing();
}

controller and action method -

public class SummaryController : ODataController
{
        public Summary Get()
        {
             //....
             return someObj;
        }
}

The route that does not work -

/odata/Summary

Can anyone please help me understand how can i make the routing work?

Answer 1

In the model, you have setup Summary to be an EntitySet, this would return a collection of Summary objects. If you want that URL to always return one object then you need a Singleton.

The CreateEdmModel method should look like this:

public static IEdmModel CreateEdmModel()
{
    ODataConventionModelBuilder modelBuilder = new ODataConventionModelBuilder();
    modelBuilder.Singleton<Summary>("Summary");
    return modelBuilder.GetEdmModel();
}