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Editorial Team
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Asked: 2026-05-28T07:11:08+00:00

I have a project I am working on that has a Order entity that

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I have a project I am working on that has a Order entity that has a navigation property for OrderITems:

public class Order
{
   public int OrderId { get; set; }
   public int CustomerId { get; set; }

   public virtual ICollection<OrderItem> OrderItems { get; set; }
}

public class OrderItem
{
   public int OrderId { get; set; }
   public int ProductId { get; set; }
   public int Quantity { get; set; }

   public virtual Order Order { get; set; }
}

I would like to be able to query the Orders with a filter against the collection of OrderItems

ex:
http:\mysvc.com\mysvc\Orders?$filter=OrderItems\ProductId eq 1234

However, I cannot seem to get this to work. Any ideas? I’d be happy to provide more details.

Project is using an EntityFramework code first 4.1 data provider.

Updated with exception and callstack:

Not Implemented Unable to create a constant value of type 'System.Data.Services.Internal.ProjectedWrapper1'. Only primitive types ('such as Int32, String, and Guid') are supported in this context.System.NotSupportedException   at System.Data.Objects.ELinq.ExpressionConverter.ConstantTranslator.TypedTranslate(ExpressionConverter parent, ConstantExpression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.ConditionalTranslator.TypedTranslate(ExpressionConverter parent, ConditionalExpression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.TranslateLambda(LambdaExpression lambda, DbExpression input)

   at System.Data.Objects.ELinq.ExpressionConverter.TranslateLambda(LambdaExpression lambda, DbExpression input, DbExpressionBinding& binding)

   at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, DbExpression& source, DbExpressionBinding& sourceBinding, DbExpression& lambda)

   at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.SelectTranslator.Translate(ExpressionConverter parent, MethodCallExpression call)

   at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.SequenceMethodTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, SequenceMethod sequenceMethod)

   at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)

   at System.Data.Objects.ELinq.ExpressionConverter.Convert()

   at System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable`1 forMergeOption)

   at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)

   at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable.GetEnumerator()

   at System.Data.Entity.Internal.Linq.InternalQuery`1.GetEnumerator()

   at System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.IEnumerable.GetEnumerator()

   at System.Data.Services.Internal.ProjectedWrapper.EnumerableWrapper.System.Collections.IEnumerable.GetEnumerator()

   at System.Data.Services.WebUtil.GetRequestEnumerator(IEnumerable enumerable)
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1 Answer

  1. Editorial Team

    With the currently released bits you would have to turn the query around:

    /OrderItems?$expand=Order&$filter=ProductId eq 1234

    The downside to this approach is that if a single order has two OrderItems with the filtered product ID you will get the same order twice. Also you will get all the filtered OrderItems. You might use $select to scope down the amount of data downloaded.

    In the latest CTP (http://blogs.msdn.com/b/astoriateam/archive/2011/10/13/announcing-wcf-data-services-oct-2011-ctp-for-net-4-and-silverlight-4.aspx) there’s a support for any/all, which is what you would use here. See this blog post for details http://www.odata.org/blog/even-more-any-and-all.

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