Fluent Nhibernate Automap 一对多孤立记录

Question

我的问题是，当我从一对多关系中删除一个对象时，子记录会变成孤立的，而不是被删除。我不确定这是我设置域模型的方式，还是我在自动映射配置期间没有设置某些内容。 Appraisal -> ShortlistedMentor 关系是出现孤立记录的地方。它们出现在ShortlistMentor 表和ShortListQuestionResponse 中。我期望的是，当我从关系中删除 ShortlistMentor 时，它会从 ShortlistMentor 表中删除，并且 ShortListQuestionResponse 表中的条目也会被删除。

 public class Appraisal : BaseEntity
{
    public Appraisal()
    {
        ShortlistedMentors = new List<ShortlistedMentor>();
        ApprovedMentor =  new User();
        College =  new RefData();
    }

    #region Primitive Properties

    public virtual bool Decision { get; set; }
    public virtual System.DateTime? ApprovedDate { get; set; }
    public virtual System.DateTime? AcceptedDate { get; set; }
    public virtual System.DateTime? CompletionTargetDate { get; set; }
    public virtual string RejectionReason { get; set; }

    public virtual IList<ShortlistedMentor> ShortlistedMentors { get; set; }

    public virtual User ApprovedMentor { get; set; }

    public virtual RefData College { get; set; }

}

 public class ShortlistedMentor : BaseEntity
{
    public virtual User Mentor { get; set; }
    public virtual IList<ShortListQuestionResponse> ShortListQuestionResponses { get; set; }

}

public class ShortListQuestionResponse : BaseEntity
{
    public virtual string Comment { get; set; }
    public virtual int Score { get; set; }
    public virtual RefData Question { get; set; }

}

自动地图设置

.Mappings
(
m => 
m.AutoMappings.Add
(
    AutoMap.AssemblyOf<User>(cfg)
    .Override<Client>(map =>{map.HasManyToMany(x => x.SICCodes).Table("SICRefDataToClient");})
    .IgnoreBase<BaseEntity>()
    .Conventions.Add(new StringColumnLengthConvention(),new EnumConvention(),DefaultCascade.SaveUpdate())
    .Conventions.Add(DefaultLazy.Always())
)

不确定这是否有帮助，但这就是我从集合中删除项目并添加新项目的方式

 ProjectToUpdate.Appraisal.ShortlistedMentors.Clear();
            foreach (var userId in Request.Form["ProjectToEdit.Appraisal.ShortlistedMentors"].Split(','))
            {
                var user = _membershipService.GetUser(Convert.ToInt16(userId));
                ProjectToUpdate.Appraisal.ShortlistedMentors.Add(new ShortlistedMentor(){Mentor = user,ShortListQuestionResponses = new List<ShortListQuestionResponse>()});

            }

Answer 1

我认为，由于您的 DefaultCascade 设置为 SaveUpdate()，因此您需要将 HasMany 关系（ShortlistedMentors）覆盖为 Cascade.AllDeleteOrphan。所以它看起来像这样：

.Override<Appraisal>(map =>{map.HasMany(x => x.ShortlistedMentors).Cascade.AllDeleteOrphan();})

我实际上并没有编译它，所以它可能并不完美。