InvalidOperationException in WebApiConfig File

Question

I'm following this video on creating service stack for Entity Framework and the video uses config.Routes.MapODataRoute("odata", "odata", builder.GetEdmModel()); in their WebApiConfig file.
I am using the same piece of code in my project and I'm getting this error:

System.InvalidOperationException: 'The complex type 'ClassLibrary1.Session' refers to the entity type 'ClassLibrary1.Customer' through the property 'Customer'.'

for this piece of code:

var builder = new ODataConventionModelBuilder();  
builder.EntitySet<Customer>("Customers");  
config.Routes.MapODataRoute("odata", "odata", builder.GetEdmModel());  

And when I hover over the method it says deprecated:

So what do I use here to get the same output of the video.

Answer 1

Hi @Jay Vijay Modi ,

What version of OData are you using?

FOR OData V3：

Install Microsoft.AspNet.WebApi.OData  
Add using System.Web.Http.OData.Builder; and using System.Web.Http.OData.Extensions;  
use like config.Routes.MapODataServiceRoute(...)  

FOR OData V4：

    Install Microsoft.AspNet.OData  
    Add using System.Web.OData.Builder; and using System.Web.OData.Extensions;  
    use like config.MapODataServiceRoute(...)  

You can refer to this article：https://stackoverflow.com/questions/27224702/config-mapodataserviceroute-error

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