QueryInterceptor and Entity Framework code first

Question

Hello,

I want to do a query in my QueryInterceptor method. This is a stupid sample that works well : 

public class WcfDataService : DataService<MyDbContext>
{
    public static void InitializeService(DataServiceConfiguration config)
    {
        config.SetEntitySetPageSize("*", 100);
        config.SetEntitySetAccessRule("Interventions", EntitySetRights.All);
        config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V3;
    }        

    [QueryInterceptor("Interventions")]
    public Expression<Func<Intervention, bool>> OnQueryInterventions()
    {
        var inter = ((IObjectContextAdapter)CurrentDataSource).ObjectContext.CreateObjectSet<Intervention>();
        return (i => inter.Any(j => j.Object.StartsWith("changement") && i.Id == j.Id));
    }
}

But, if I replace the line :

var inter = ((IObjectContextAdapter)CurrentDataSource).ObjectContext.CreateObjectSet<Intervention>();

by

var inter = CurrentDataSource.Set<Intervention>();

it doesn't work. Why does it work with ObjectSet and not with DbSet ?

Cordially,
Kakone.

Answer 1

Hi Kakone,

Welcome!

The question has been discussed : http://qa.social.msdn.microsoft.com/Forums/en-US/adodotnetdataservices/thread/a7b26c30-e32d-4324-90cb-e90c7141fd49 

Have a nice day.

---

Alan Chen[MSFT]
MSDN Community Support | Feedback to us
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Answer 2

I use the WCF Data Services Oct 2011 CTP. In this CTP, the DataService class supports the DbContext directly (in theory). I hope it's just a bug...

Answer 3

Hi Kakone,

Yes, it is a known issue and it will be updated in next version, thanks for understanding.

Have a nice day.

---

Alan Chen[MSFT]
MSDN Community Support | Feedback to us
Get or Request Code Sample from Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.