Reputation: 2075

Not sure how to debug my WCF REST service

I am new to the REST model with WCF. I downloaded the WCF Rest Service Template for .NET 4.0.

I have a project that is using the EF to retrieve a POCO entity from a database and then return that entity to the user.

The [WebGet] method executes properly and I can debug it to see the data being returned. However, it seems, when serializing the POCO object and trying to return it to the caller, the system is failing.

A couple of points here: 1. I can create a manual POCO object and return it fine. However, when it is returning a POCO object sourced from the database (using EF), the call fails upon return (the EF query work properly--the WebGet method just doesnt return it back to the caller. 2. The HTTP response code is 400 Bad Request. I don't get any other info (and no .NET exception).
3. The same behavior occurs when running in IIS or the Visual Studio web server.

How should I go about debugging this issue?

Thanks!

p.s. The WebGet method is below (and executes properly):


        [WebGet(UriTemplate = "WorkInstruction")]

    public WorkInstruction GetFirst()
    {
         using (ContentDBEntities objectContext = new ContentDBEntities("name=connString"))
         {
                return objectContext.WorkInstructions.First();
         }
    }

Upvotes: 1