EF核心一对多回到同一实体

Question

我有一个实体SubQuestion，它可以与零个，一个或多个其他子问题有关。我正在尝试使用EF Core对此建模。这是我到目前为止提出的设计。

实体：

public class SubQuestionRelated
{
    public int SubQuestionId { get; set; }
    public SubQuestion SubQuestion { get; set; }
    public int RelatedToSubQuestionId { get; set; }
    public SubQuestion RelatedToSubQuestion { get; set; }
}

public class SubQuestion
{
    public int Id { get; set; }
    public List<SubQuestionRelated> RelatedSubQuestions { get; set; } = new List<SubQuestionRelated>();
    public SubQuestionRelated DontUse { get; set; }
    // other properties not relevant...
}

OnModelCreating配置

 modelBuilder.Entity<SubQuestionTPCalc>()
            .HasKey(sqtpc => new { sqtpc.SubQuestionId, sqtpc.RelatedToSubQuestionId });

 modelBuilder.Entity<SubQuestionTPCalc>()
            .HasOne(sqtpc => sqtpc.SubQuestion)
            .WithOne(sq => sq.DontUse)
            .OnDelete(DeleteBehavior.Restrict);

 modelBuilder.Entity<SubQuestionTPCalc>()
            .HasOne(sqtpc => sqtpc.RelatedToSubQuestion)
            .WithMany(sq => sq.RelatedSubQuestions)
            .HasForeignKey(sqtpc => sqtpc.RelatedToSubQuestionId);

问题

return _dbContext.Questions
                        .Include(q => q.SubQuestions)
                        .ThenInclude(sq => sq.RelatedSubQuestions)
                        .ToList();

问题是当我去查询该数据时，EF Core将不会加载“相关子问题”。我猜有一些默认行为可以防止循环引用？我要EF Core做的是向RelatedSubQuestion表的LEFT JOIN。

UPDATE

EF Core提出了相关子问题，但它加入了错误的领域。它正在从SubQuestion加入RelatedToSubQuestionId，而我想从SubQuestion加入SubQuestionId ...