I am using Lightspeed 4.0.1600.21511 (nightly 26 sept 2012) on the Northwind database. I try to select categories with discontinued products.
This works:
uow.Categories.Where(c => c.Products.Any(p => p.Discontinued == true))
This throws an exception:
uow.Categories.Where(c => c.Products.Any(p => p.Discontinued))
I expect it to behave exactly the same as the first statement. Here is the exception detail:
System.ArgumentNullException was unhandled
Message=Value cannot be null.
Parameter name: entityType
Source=Mindscape.LightSpeed
ParamName=entityType
StackTrace:
at Mindscape.LightSpeed.Utils.Invariant.ArgumentNotNull(Object , String )
at Mindscape.LightSpeed.Querying.PathExpression..ctor(Type entityType, String path)
at Mindscape.LightSpeed.Querying.PathExpression..ctor(Type entityType, String alias, String path)
at Mindscape.LightSpeed.Linq.Sqo.CriteriaSqo.ExtractCriteria(LinqQueryPlanExpression plan, Expression expression)
at Mindscape.LightSpeed.Linq.Sqo.CriteriaSqo.ExtractCriteriaCore(LinqQueryPlanExpression plan, Expression expression)
at Mindscape.LightSpeed.Linq.Sqo.CriteriaSqo.ExtractCriteria(LinqQueryPlanExpression plan, Expression expression)
at Mindscape.LightSpeed.Linq.Sqo.CriteriaSqo.ExtractCriteriaCore(LinqQueryPlanExpression plan, Expression expression)
at Mindscape.LightSpeed.Linq.Sqo.CriteriaSqo.ExtractCriteria(LinqQueryPlanExpression plan, Expression expression)
at Mindscape.LightSpeed.Linq.Sqo.Where.ExtractWhereCriteria(MethodCallExpression expression, LinqQueryPlanExpression plan, GroupResultsPlan groupPlan)
at Mindscape.LightSpeed.Linq.Sqo.Where.Evaluate(ExpressionVisitor visitor, MethodCallExpression expression)
at Mindscape.LightSpeed.Linq.Plan.LinqQueryBuilder.VisitMethodCall(MethodCallExpression exp)
at Mindscape.LightSpeed.Linq.Plan.LinqQueryBuilder.Visit(Expression exp)
at Mindscape.LightSpeed.Linq.Sqo.Select.Evaluate(ExpressionVisitor visitor, MethodCallExpression expression)
at Mindscape.LightSpeed.Linq.Plan.LinqQueryBuilder.VisitMethodCall(MethodCallExpression exp)
at Mindscape.LightSpeed.Linq.Plan.LinqQueryBuilder.Visit(Expression exp)
at Mindscape.LightSpeed.Linq.Plan.LinqQueryBuilder.Build(Expression translation, LinqQueryProvider provider)
at Mindscape.LightSpeed.Linq.LinqQueryProvider.GetExecutionPlan(Expression expression)
at Mindscape.LightSpeed.Linq.LinqQueryProvider.Execute(Expression expression)
at Mindscape.LightSpeed.Linq.LinqQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression)
at Mindscape.LightSpeed.Linq.LinqQuery`1.GetEnumerator()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at Northwind.Form1.button1_Click(Object sender, EventArgs ea) in D:\Projects\Northwind\Northwind\Form1.cs:line 29
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at Northwind.Program.Main() in D:\Projects\Northwind\Northwind\Program.cs:line 18
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:
