Fix exception thrown by EF Core 8 preview

src/JsonApiDotNetCore.SourceGenerators/SourceCodeWriter.cs

@@ -98,7 +98,7 @@ private void WriteNullableEnable()
 
     private void WriteNamespaceImports(INamedTypeSymbol loggerFactoryInterface, INamedTypeSymbol resourceType, string? controllerNamespace)
     {
-        _sourceBuilder.AppendLine($@"using {loggerFactoryInterface.ContainingNamespace};");
+        _sourceBuilder.AppendLine($"using {loggerFactoryInterface.ContainingNamespace};");
 
         _sourceBuilder.AppendLine("using JsonApiDotNetCore.Configuration;");
         _sourceBuilder.AppendLine("using JsonApiDotNetCore.Controllers;");
@@ -123,7 +123,7 @@ private void WriteOpenClassDeclaration(string controllerName, JsonApiEndpointsCo
         string baseClassName = GetControllerBaseClassName(endpointsToGenerate);
 
         WriteIndent();
-        _sourceBuilder.AppendLine($@"public sealed partial class {controllerName} : {baseClassName}<{resourceType.Name}, {idType}>");
+        _sourceBuilder.AppendLine($"public sealed partial class {controllerName} : {baseClassName}<{resourceType.Name}, {idType}>");
 
         WriteOpenCurly();
     }

src/JsonApiDotNetCore/Repositories/EntityFrameworkCoreRepository.cs

@@ -619,7 +619,18 @@ protected async Task UpdateRelationshipAsync(RelationshipAttribute relationship,
     private bool RequireLoadOfInverseRelationship(RelationshipAttribute relationship, [NotNullWhen(true)] object? trackedValueToAssign)
     {
         // See https://github.com/json-api-dotnet/JsonApiDotNetCore/issues/502.
-        return trackedValueToAssign != null && relationship is HasOneAttribute { IsOneToOne: true };
+        if (trackedValueToAssign != null && relationship is HasOneAttribute { IsOneToOne: true })
+        {
+            IEntityType? leftEntityType = _dbContext.Model.FindEntityType(relationship.LeftType.ClrType);
+            INavigation? navigation = leftEntityType?.FindNavigation(relationship.Property.Name);
+
+            if (navigation != null && navigation.ForeignKey.DeclaringEntityType.ClrType == relationship.LeftType.ClrType)
+            {
+                return true;
+            }
+        }
+
+        return false;
     }
 
     protected virtual async Task SaveChangesAsync(CancellationToken cancellationToken)

test/JsonApiDotNetCoreTests/IntegrationTests/AtomicOperations/MusicTrack.cs

@@ -9,7 +9,7 @@ namespace JsonApiDotNetCoreTests.IntegrationTests.AtomicOperations;
 [Resource(ControllerNamespace = "JsonApiDotNetCoreTests.IntegrationTests.AtomicOperations")]
 public sealed class MusicTrack : Identifiable<Guid>
 {
-    [RegularExpression(@"(?im)^[{(]?[0-9A-F]{8}[-]?(?:[0-9A-F]{4}[-]?){3}[0-9A-F]{12}[)}]?$")]
+    [RegularExpression("(?im)^[{(]?[0-9A-F]{8}[-]?(?:[0-9A-F]{4}[-]?){3}[0-9A-F]{12}[)}]?$")]
     public override Guid Id { get; set; }
 
     [Attr]

test/JsonApiDotNetCoreTests/IntegrationTests/NonJsonApiControllers/NonJsonApiControllerTests.cs

@@ -41,14 +41,13 @@ public async Task Get_skips_middleware_and_formatters()
     public async Task Post_skips_middleware_and_formatters()
     {
         // Arrange
-        using var request = new HttpRequestMessage(HttpMethod.Post, "/NonJsonApi")
+        using var request = new HttpRequestMessage(HttpMethod.Post, "/NonJsonApi");
+
+        request.Content = new StringContent("Jack")
         {
-            Content = new StringContent("Jack")
+            Headers =
             {
-                Headers =
-                {
-                    ContentType = new MediaTypeHeaderValue("text/plain")
-                }
+                ContentType = new MediaTypeHeaderValue("text/plain")
             }
         };
 
@@ -90,14 +89,13 @@ public async Task Post_skips_error_handler()
     public async Task Put_skips_middleware_and_formatters()
     {
         // Arrange
-        using var request = new HttpRequestMessage(HttpMethod.Put, "/NonJsonApi")
+        using var request = new HttpRequestMessage(HttpMethod.Put, "/NonJsonApi");
+
+        request.Content = new StringContent("\"Jane\"")
         {
-            Content = new StringContent("\"Jane\"")
+            Headers =
             {
-                Headers =
-                {
-                    ContentType = new MediaTypeHeaderValue("application/json")
-                }
+                ContentType = new MediaTypeHeaderValue("application/json")
             }
         };
 

test/SourceGeneratorTests/ControllerGenerationTests.cs

@@ -538,7 +538,7 @@ public sealed class Item : Identifiable<string?>
         GeneratorDriverRunResult runResult = driver.GetRunResult();
         runResult.Should().NotHaveDiagnostics();
 
-        runResult.Should().HaveProducedSourceCodeContaining(@"#nullable enable");
+        runResult.Should().HaveProducedSourceCodeContaining("#nullable enable");
     }
 
     [Fact]