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" task.Assignee.Clear() " nhibernate を呼び出すと、SQLLite および SQLServer の SQL の下に作成されます (呼び出し時に担当者に 1 つのレコード)

DELETE FROM TaskAssignees
WHERE  TaskId = 'd8e13c83-20b8-4ce6-a814-a264000c21a6' /* @p0 */
       AND UserId = 'f676b54b-d986-4659-a4aa-9103d928f91b' /* @p1 */
       AND TeamId = NULL /* @p2 */
       AND DepartmentId = NULL /* @p3 */
       AND VirtualUserId = NULL /* @p4 */
       AND IsMain = 1

= NULL は SQL のチェックに誤りがあるため、このクエリは実行されません。次のようにする必要があります。

DELETE FROM TaskAssignees
WHERE  TaskId = 'd8e13c83-20b8-4ce6-a814-a264000c21a6' /* @p0 */
       AND UserId = 'f676b54b-d986-4659-a4aa-9103d928f91b' /* @p1 */
       AND TeamId is NULL /* @p2 */
       AND DepartmentId is  NULL /* @p3 */
       AND VirtualUserId is  NULL /* @p4 */
       AND IsMain = 1

この問題を解決するにはどうすればよいですか?

マッピングには FluentNhibernate を使用し、NHibernate 3.3 を使用します。

マッピングとクラス:

public TaskMap()
{
    Table("Tasks");
    CompositeId<TaskId>(x => x.Id).KeyProperty(t => t.Id);
    Map(x => x.Name).Not.Nullable();

    HasMany(x => x.Assignees)
        .AsList(c => c.Column("AssigneeIndex"))
        .Component(m =>
        {
            m.Component(x => x.UserId, mm => mm.Map(x => x.Id).Column("UserId").Nullable());
            m.Component(x => x.TeamId, mm => mm.Map(x => x.Id).Column("TeamId").Nullable());
            m.Component(x => x.DepartmentId, mm => mm.Map(x => x.Id).Column("DepartmentId").Nullable());
            m.Component(x => x.VirtualUserId, mm => mm.Map(x => x.Id).Column("VirtualUserId").Nullable());
            m.Map(x => x.IsMain).Not.Nullable();
        })
        .KeyColumn("TaskId")
        .Table("TaskAssignees")
        .Cascade.All();
}

public class Task : Entity<TaskId> 
{
    public TaskId Id {get;set;}
    public string Name {get;set;}
    public Iesi.Collections.Generic.ISet<TaskAssignee> Assignees {get;set;}
}

public class TaskAssignee : ValueObject
{
    public UserId UserId {get;protected set;}
    public TeamId TeamId {get;protected set;}
    public VirtualUserId VirtualUserId {get;protected set;}
    public DepartmentId DepartmentId {get;protected set;}
    public bool IsMain {get;protected set;}
}

public class TaskId : ValueObject
{
    public Guid Id {get;protected set;}
}

public class TeamId : ValueObject
{
    public Guid Id {get;protected set;}
}

public class VirtualUserId : ValueObject
{
    public Guid Id {get;protected set;}
}

public class DepartmentId : ValueObject
{
    public Guid Id {get;protected set;}
}

public class UserId : ValueObject
{
    public Guid Id {get;protected set;}
}
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