Add API to remove a resource from the graph (after assembly scanning)

Author: bkoelman

src/JsonApiDotNetCore/Configuration/ResourceGraphBuilder.cs

@@ -167,6 +167,32 @@ private static bool IsImplicitManyToManyJoinEntity(IEntityType entityType)
         return entityType is { IsPropertyBag: true, HasSharedClrType: true };
     }
 
+    /// <summary>
+    /// Removes a JSON:API resource.
+    /// </summary>
+    /// <typeparam name="TResource">
+    /// The resource CLR type.
+    /// </typeparam>
+    public ResourceGraphBuilder Remove<TResource>()
+        where TResource : class, IIdentifiable
+    {
+        return Remove(typeof(TResource));
+    }
+
+    /// <summary>
+    /// Removes a JSON:API resource.
+    /// </summary>
+    /// <param name="resourceClrType">
+    /// The resource CLR type.
+    /// </param>
+    public ResourceGraphBuilder Remove(Type resourceClrType)
+    {
+        ArgumentNullException.ThrowIfNull(resourceClrType);
+
+        _resourceTypesByClrType.Remove(resourceClrType);
+        return this;
+    }
+
     /// <summary>
     /// Adds a JSON:API resource.
     /// </summary>

test/JsonApiDotNetCoreTests/UnitTests/ResourceGraph/ResourceGraphBuilderTests.cs

@@ -163,6 +163,55 @@ public void Cannot_add_resource_that_implements_only_non_generic_IIdentifiable()
             .WithMessage($"Resource type '{typeof(ResourceWithoutId)}' implements 'IIdentifiable', but not 'IIdentifiable<TId>'.");
     }
 
+    [Fact]
+    public void Can_remove_existing_resource_type()
+    {
+        // Arrange
+        var options = new JsonApiOptions();
+        var builder = new ResourceGraphBuilder(options, NullLoggerFactory.Instance);
+        builder.Add<ResourceWithHasOneRelationship, int>();
+        builder.Add<ResourceWithAttribute, int>();
+
+        // Act
+        builder.Remove<ResourceWithHasOneRelationship>();
+
+        // Assert
+        IResourceGraph resourceGraph = builder.Build();
+        resourceGraph.GetResourceTypes().Should().ContainSingle().Which.ClrType.Should().Be<ResourceWithAttribute>();
+    }
+
+    [Fact]
+    public void Can_remove_missing_resource_type()
+    {
+        // Arrange
+        var options = new JsonApiOptions();
+        var builder = new ResourceGraphBuilder(options, NullLoggerFactory.Instance);
+        builder.Add<ResourceWithAttribute, int>();
+
+        // Act
+        builder.Remove<ResourceWithHasManyRelationship>();
+
+        // Assert
+        IResourceGraph resourceGraph = builder.Build();
+        resourceGraph.GetResourceTypes().Should().ContainSingle().Which.ClrType.Should().Be<ResourceWithAttribute>();
+    }
+
+    [Fact]
+    public void Can_remove_non_resource_type()
+    {
+        // Arrange
+        var options = new JsonApiOptions();
+        var builder = new ResourceGraphBuilder(options, NullLoggerFactory.Instance);
+        builder.Add<ResourceWithAttribute, int>();
+
+        // Act
+        builder.Remove(typeof(NonResource));
+
+        // Assert
+        IResourceGraph resourceGraph = builder.Build();
+        resourceGraph.GetResourceTypes().Should().ContainSingle().Which.ClrType.Should().Be<ResourceWithAttribute>();
+    }
+
     [Fact]
     public void Cannot_build_graph_with_missing_related_HasOne_resource()
     {