Added IsDefined check to IFilterContext and ISortingContext.

src/HotChocolate/Data/src/Data/Filters/Context/FilterContext.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using HotChocolate.Language;
 using HotChocolate.Resolvers;
 using HotChocolate.Types;
@@ -9,7 +6,7 @@
 namespace HotChocolate.Data.Filters;
 
 /// <summary>
-/// Encapuslates all filter specific information
+/// Encapsulates all filter specific information
 /// </summary>
 public class FilterContext : IFilterContext
 {
@@ -42,6 +39,9 @@ public void Handled(bool isHandled)
         }
     }
 
+    /// <inheritdoc />
+    public bool IsDefined => _value.ValueNode.Kind is not SyntaxKind.NullValue;
+
     /// <inheritdoc />
     public IReadOnlyList<IFilterFieldInfo> GetFields() => _value.GetFields();
 

src/HotChocolate/Data/src/Data/Filters/Context/IFilterContext.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace HotChocolate.Data.Filters;
 
 /// <summary>
@@ -14,6 +12,11 @@ public interface IFilterContext : IFilterInfo
     /// </summary>
     /// <param name="isHandled">If false, sorting is applied on the result of the resolver</param>
     void Handled(bool isHandled);
+
+    /// <summary>
+    /// Specifies if a filter was defined.
+    /// </summary>
+    bool IsDefined { get; }
 
     /// <summary>
     /// Serializes the input object to a dictionary

src/HotChocolate/Data/src/Data/Sorting/Context/ISortingContext.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace HotChocolate.Data.Sorting;
 
 /// <summary>
@@ -15,6 +13,11 @@ public interface ISortingContext
     /// <param name="isHandled">If false, sorting is applied on the result of the resolver</param>
     void Handled(bool isHandled);
 
+    /// <summary>
+    /// Specifies if sorting was defined.
+    /// </summary>
+    bool IsDefined { get; }
+
     /// <summary>
     /// Serializes the input object to a dictionary
     /// </summary>

src/HotChocolate/Data/src/Data/Sorting/Context/SortingContext.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using HotChocolate.Language;
 using HotChocolate.Resolvers;
 using HotChocolate.Types;
@@ -46,6 +43,9 @@ public void Handled(bool isHandled)
         }
     }
 
+    /// <inheritdoc />
+    public bool IsDefined => _value is not [{ ValueNode.Kind: SyntaxKind.NullValue, },];
+
     /// <inheritdoc />
     public IReadOnlyList<IReadOnlyList<ISortingFieldInfo>> GetFields()
         => _value.Select(x => x.GetFields()).ToArray();

src/HotChocolate/Data/test/Data.Filters.Tests/Context/FilterContextTests.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Linq;
-using System.Threading.Tasks;
 using CookieCrumble;
 using HotChocolate.Data.Filters.Expressions;
 using HotChocolate.Execution;
@@ -54,6 +50,80 @@ public async Task GetFields_Should_ReturnScalarField()
         Assert.Equal("eq", operation.Field.Name);
         Assert.Equal("test", Assert.IsType<FilterValue>(operation.Value).Value);
     }
+
+    [Fact]
+    public async Task When_Query_Is_Empty_IsDefined_Should_Be_False()
+    {
+        // arrange
+        IFilterContext? context = null;
+        var executor = await new ServiceCollection()
+            .AddGraphQL()
+            .AddQueryType(t => t
+                .Name("Query")
+                .Field("test")
+                .Type<ListType<ObjectType<Book>>>()
+                .UseFiltering()
+                .Resolve(ctx =>
+                {
+                    context = ctx.GetFilterContext();
+                    return Array.Empty<Book>();
+                }))
+            .AddFiltering()
+            .BuildRequestExecutorAsync();
+
+        // act
+        const string query = 
+            """
+            {
+              test {
+                title
+              }
+            }
+            """;
+
+        await executor.ExecuteAsync(query);
+
+        // assert
+        Assert.NotNull(context);
+        Assert.False(context!.IsDefined);
+    }
+
+    [Fact]
+    public async Task When_Query_Is_Set_IsDefined_Should_Be_False()
+    {
+        // arrange
+        IFilterContext? context = null;
+        var executor = await new ServiceCollection()
+            .AddGraphQL()
+            .AddQueryType(t => t
+                .Name("Query")
+                .Field("test")
+                .Type<ListType<ObjectType<Book>>>()
+                .UseFiltering()
+                .Resolve(ctx =>
+                {
+                    context = ctx.GetFilterContext();
+                    return Array.Empty<Book>();
+                }))
+            .AddFiltering()
+            .BuildRequestExecutorAsync();
+
+        // act
+        const string query = 
+            """
+            {
+              test(where: { title: { eq: "test" } }) {
+                title
+              }
+            }
+            """;
+
+        await executor.ExecuteAsync(query);
+
+        // assert
+        Assert.NotNull(context);
+        Assert.True(context!.IsDefined);
+    }
 
     [Fact]
     public async Task GetFields_Should_ReturnScalarFieldWithListOperation()

src/HotChocolate/Data/test/Data.Sorting.Tests/Context/SortingContextTests.cs

@@ -1,6 +1,4 @@
-using System;
 using System.Collections.Immutable;
-using System.Threading.Tasks;
 using CookieCrumble;
 using HotChocolate.Data.Sorting.Expressions;
 using HotChocolate.Execution;
@@ -49,6 +47,80 @@ public async Task GetFields_Should_ReturnScalarField()
         Assert.Equal("title", field.Field.Name);
         Assert.Equal("DESC", operation);
     }
+
+    [Fact]
+    public async Task When_Sorting_Is_Empty_IsDefined_Should_Be_False()
+    {
+        // arrange
+        ISortingContext? context = null;
+        var executor = await new ServiceCollection()
+            .AddGraphQL()
+            .AddQueryType(x => x
+                .Name("Query")
+                .Field("test")
+                .Type<ListType<ObjectType<Book>>>()
+                .UseSorting()
+                .Resolve(x =>
+                {
+                    context = x.GetSortingContext();
+                    return Array.Empty<Book>();
+                }))
+            .AddSorting()
+            .BuildRequestExecutorAsync();
+
+        // act
+        const string query =
+            """
+            {
+              test {
+                title
+              }
+            }
+            """;
+
+        await executor.ExecuteAsync(query);
+
+        // assert
+        Assert.NotNull(context);
+        Assert.False(context!.IsDefined);
+    }
+
+    [Fact]
+    public async Task When_Sorting_Is_Set_IsDefined_Should_Be_True()
+    {
+        // arrange
+        ISortingContext? context = null;
+        var executor = await new ServiceCollection()
+            .AddGraphQL()
+            .AddQueryType(x => x
+                .Name("Query")
+                .Field("test")
+                .Type<ListType<ObjectType<Book>>>()
+                .UseSorting()
+                .Resolve(x =>
+                {
+                    context = x.GetSortingContext();
+                    return Array.Empty<Book>();
+                }))
+            .AddSorting()
+            .BuildRequestExecutorAsync();
+
+        // act
+        const string query = 
+            """
+            {
+              test(order: { title: DESC }) {
+                title
+              }
+            }
+            """;
+
+        await executor.ExecuteAsync(query);
+
+        // assert
+        Assert.NotNull(context);
+        Assert.True(context!.IsDefined);
+    }
 
     [Fact]
     public async Task GetFields_Should_ReturnMultipleScalarField()