test: all passing

Author: maurei

src/JsonApiDotNetCore/Data/DefaultEntityRepository.cs

@@ -149,6 +149,15 @@ public virtual async Task<TEntity> GetAndIncludeAsync(TId id, string relationshi
         public virtual async Task<TEntity> CreateAsync(TEntity entity)
         {
             AttachRelationships(entity);
+            foreach (var relationshipEntry in _jsonApiContext.RelationshipsToUpdate)
+            {
+                var relationshipValue = relationshipEntry.Value;
+                if (relationshipEntry.Key is HasManyThroughAttribute throughAttribute)
+                {
+                    AssignHasManyThrough(entity, throughAttribute, (IList)relationshipValue);
+                }
+            }
+
             _dbSet.Add(entity);
 
             await _context.SaveChangesAsync();

test/JsonApiDotNetCoreExampleTests/Acceptance/Spec/UpdatingRelationshipsTests.cs

@@ -625,7 +625,6 @@ public async Task Can_Delete_Relationship_By_Patching_Relationship()
         [Fact]
         public async Task Updating_ToOne_Relationship_With_Implicit_Remove()
         {
-
             // Arrange
             var context = _fixture.GetService<AppDbContext>();
             var passport = new Passport();