Fix to #6937 - Query: Contains on element coming from optional naviga…

…tion doesn't get server-evaluated

Problem was that when trying to translate contains ResultOperator we assumed that the translatable expression would always be member access or a EF.Property method call.
However in some cases (e.g. when item is part of an optional navigation) this is not the case, and the underlying member/EF.Property is wrapped around Convert and/or NullConditional.
Fix is to perform translation on the item before before checking what shape it is. This simplifies the code and protects from similar situations, because SqlTranslatingExpressionVisitor already optimizes out a lot of redundant nodes in the expression tree.

src/Microsoft.EntityFrameworkCore.Relational/Query/ExpressionVisitors/SqlTranslatingExpressionVisitor.cs

@@ -858,25 +858,10 @@ protected override Expression VisitSubQuery(SubQueryExpression expression)
                     || fromExpression.NodeType == ExpressionType.ListInit
                     || fromExpression.NodeType == ExpressionType.NewArrayInit)
                 {
-                    var memberItem = contains.Item as MemberExpression;
-
-                    if (memberItem != null)
+                    var containsItem = Visit(contains.Item)?.RemoveConvert() as AliasExpression;
+                    if (containsItem != null)
                     {
-                        var aliasExpression = VisitMember(memberItem) as AliasExpression;
-
-                        return aliasExpression != null
-                            ? new InExpression(aliasExpression, new[] { fromExpression })
-                            : null;
-                    }
-
-                    var methodCallItem = contains.Item as MethodCallExpression;
-
-                    if (methodCallItem != null
-                        && EntityQueryModelVisitor.IsPropertyMethod(methodCallItem.Method))
-                    {
-                        var aliasExpression = (AliasExpression)VisitMethodCall(methodCallItem);
-
-                        return new InExpression(aliasExpression, new[] { fromExpression });
+                        return new InExpression(containsItem, new[] { fromExpression });
                     }
                 }
             }

src/Microsoft.EntityFrameworkCore.Specification.Tests/ComplexNavigationsQueryTestBase.cs

@@ -3094,6 +3094,26 @@ join l2 in ctx.LevelTwo on l1.Id equals ctx.LevelTwo.Select(l => l.Id).OrderBy(l
             }
         }
 
+        // Issue #6997
+        ////[ConditionalFact]
+        public virtual void Complex_query_with_optional_navigations_and_client_side_evaluation()
+        {
+            AssertQuery<Level1>(
+            l1s => l1s.Where(l1 => !l1.OneToMany_Optional.Select(l2 => l2.OneToOne_Optional_FK.OneToOne_Optional_FK.Id).All(l4 => ClientMethod(l4))),
+            l1s => l1s.Where(l1 => l1.OneToMany_Optional.Select(l2 => MaybeScalar(
+                l2.OneToOne_Optional_FK,
+                () => MaybeScalar<int>(
+                    l2.OneToOne_Optional_FK.OneToOne_Optional_FK,
+                    () => l2.OneToOne_Optional_FK.OneToOne_Optional_FK.Id))).All(a => true)),
+                e => e.Id,
+                (e, a) => Assert.Equal(e.Id, a.Id));
+        }
+
+        private bool ClientMethod(int? id)
+        {
+            return true;
+        }
+
         private static TResult Maybe<TResult>(object caller, Func<TResult> expression) where TResult : class
         {
             if (caller == null)

test/Microsoft.EntityFrameworkCore.SqlServer.FunctionalTests/ComplexNavigationsQuerySqlServerTest.cs

@@ -2385,6 +2385,15 @@ ORDER BY [l0].[Id]
                 Sql);
         }
 
+        public override void Complex_query_with_optional_navigations_and_client_side_evaluation()
+        {
+            base.Complex_query_with_optional_navigations_and_client_side_evaluation();
+
+            Assert.Equal(
+                @"",
+                Sql);
+        }
+
         private const string FileLineEnding = @"
 ";
 

test/Microsoft.EntityFrameworkCore.SqlServer.FunctionalTests/GearsOfWarQuerySqlServerTest.cs

@@ -398,15 +398,19 @@ public override void Include_where_list_contains_navigation()
         {
             base.Include_where_list_contains_navigation();
 
-            Assert.Equal(
+            Assert.StartsWith(
                 @"SELECT [t].[Id]
 FROM [CogTag] AS [t]
 
 SELECT [g].[Nickname], [g].[SquadId], [g].[AssignedCityName], [g].[CityOrBirthName], [g].[Discriminator], [g].[FullName], [g].[HasSoulPatch], [g].[LeaderNickname], [g].[LeaderSquadId], [g].[Rank], [g.Tag].[Id], [g.Tag].[GearNickName], [g.Tag].[GearSquadId], [g.Tag].[Note], [c].[Id], [c].[GearNickName], [c].[GearSquadId], [c].[Note]
 FROM [Gear] AS [g]
 LEFT JOIN [CogTag] AS [g.Tag] ON ([g].[Nickname] = [g.Tag].[GearNickName]) AND ([g].[SquadId] = [g.Tag].[GearSquadId])
 LEFT JOIN [CogTag] AS [c] ON ([c].[GearNickName] = [g].[Nickname]) AND ([c].[GearSquadId] = [g].[SquadId])
-WHERE [g].[Discriminator] IN (N'Officer', N'Gear') AND [g.Tag].[Id] IS NOT NULL
+WHERE [g].[Discriminator] IN (N'Officer', N'Gear') AND ([g.Tag].[Id] IS NOT NULL AND [g.Tag].[Id] IN ('",
+                Sql);
+
+            Assert.EndsWith(
+                @"'))
 ORDER BY [g].[Nickname], [g].[SquadId]",
                 Sql);
         }
@@ -415,7 +419,7 @@ public override void Include_where_list_contains_navigation2()
         {
             base.Include_where_list_contains_navigation2();
 
-            Assert.Equal(
+            Assert.StartsWith(
                 @"SELECT [t].[Id]
 FROM [CogTag] AS [t]
 
@@ -424,7 +428,11 @@ FROM [Gear] AS [g]
 LEFT JOIN [CogTag] AS [g.Tag] ON ([g].[Nickname] = [g.Tag].[GearNickName]) AND ([g].[SquadId] = [g.Tag].[GearSquadId])
 INNER JOIN [City] AS [g.CityOfBirth] ON [g].[CityOrBirthName] = [g.CityOfBirth].[Name]
 LEFT JOIN [CogTag] AS [c] ON ([c].[GearNickName] = [g].[Nickname]) AND ([c].[GearSquadId] = [g].[SquadId])
-WHERE [g].[Discriminator] IN (N'Officer', N'Gear') AND [g.CityOfBirth].[Location] IS NOT NULL
+WHERE [g].[Discriminator] IN (N'Officer', N'Gear') AND ([g.CityOfBirth].[Location] IS NOT NULL AND [g.Tag].[Id] IN ('",
+                Sql);
+
+            Assert.EndsWith(
+                @"'))
 ORDER BY [g].[Nickname], [g].[SquadId]",
                 Sql);
         }
@@ -433,14 +441,18 @@ public override void Navigation_accessed_twice_outside_and_inside_subquery()
         {
             base.Navigation_accessed_twice_outside_and_inside_subquery();
 
-            Assert.Equal(
+            Assert.StartsWith(
                 @"SELECT [t].[Id]
 FROM [CogTag] AS [t]
 
 SELECT [g].[Nickname], [g].[SquadId], [g].[AssignedCityName], [g].[CityOrBirthName], [g].[Discriminator], [g].[FullName], [g].[HasSoulPatch], [g].[LeaderNickname], [g].[LeaderSquadId], [g].[Rank], [g.Tag].[Id], [g.Tag].[GearNickName], [g.Tag].[GearSquadId], [g.Tag].[Note]
 FROM [Gear] AS [g]
 LEFT JOIN [CogTag] AS [g.Tag] ON ([g].[Nickname] = [g.Tag].[GearNickName]) AND ([g].[SquadId] = [g.Tag].[GearSquadId])
-WHERE [g].[Discriminator] IN (N'Officer', N'Gear') AND [g.Tag].[Id] IS NOT NULL
+WHERE [g].[Discriminator] IN (N'Officer', N'Gear') AND ([g.Tag].[Id] IS NOT NULL AND [g.Tag].[Id] IN ('",
+                Sql);
+
+            Assert.EndsWith(
+                @"'))
 ORDER BY [g].[Nickname], [g].[SquadId]",
                 Sql);
         }

test/Microsoft.EntityFrameworkCore.SqlServer.FunctionalTests/QueryNavigationsSqlServerTest.cs

@@ -910,6 +910,7 @@ public override void Navigation_inside_contains()
                 @"SELECT [o].[OrderID], [o].[CustomerID], [o].[EmployeeID], [o].[OrderDate], [o.Customer].[CustomerID], [o.Customer].[Address], [o.Customer].[City], [o.Customer].[CompanyName], [o.Customer].[ContactName], [o.Customer].[ContactTitle], [o.Customer].[Country], [o.Customer].[Fax], [o.Customer].[Phone], [o.Customer].[PostalCode], [o.Customer].[Region]
 FROM [Orders] AS [o]
 LEFT JOIN [Customers] AS [o.Customer] ON [o].[CustomerID] = [o.Customer].[CustomerID]
+WHERE [o.Customer].[City] IN (N'Novigrad', N'Seattle')
 ORDER BY [o].[CustomerID]",
                 Sql);
         }
@@ -923,6 +924,7 @@ public override void Navigation_inside_contains_nested()
 FROM [Order Details] AS [od]
 INNER JOIN [Orders] AS [od.Order] ON [od].[OrderID] = [od.Order].[OrderID]
 LEFT JOIN [Customers] AS [od.Order.Customer] ON [od.Order].[CustomerID] = [od.Order.Customer].[CustomerID]
+WHERE [od.Order.Customer].[City] IN (N'Novigrad', N'Seattle')
 ORDER BY [od.Order].[CustomerID]",
                 Sql);
         }
@@ -936,6 +938,7 @@ public override void Navigation_from_join_clause_inside_contains()
 FROM [Order Details] AS [od]
 INNER JOIN [Orders] AS [o] ON [od].[OrderID] = [o].[OrderID]
 LEFT JOIN [Customers] AS [o.Customer] ON [o].[CustomerID] = [o.Customer].[CustomerID]
+WHERE [o.Customer].[Country] IN (N'USA', N'Redania')
 ORDER BY [o].[CustomerID]",
                 Sql);
         }