自引用表实体框架插入记录

本文关键字：插入 记录 框架 实体 自引用 | 更新日期: 2023-09-27 18:21:08

无法确定相关操作的有效顺序。依赖项可能由于外键约束、模型要求或存储生成的值而存在

ASP.NET MVC3实体框架4.1

我的型号

public class OrganizationStructure
{
    public OrganizationStructure()
    {
        this.OrganizationStructures = new List<OrganizationStructure>();
        InputDate = DateTime.Now;
    }
    public int ID { get; set; }
    public string Name { get; set; }
    public int OrganizationStructureID { get; set; }
    public int OrganizationID { get; set; }
    public int OrganizationTypeID { get; set; }
    public int OrganizationActivityID { get; set; }
    public int OrganizationLocationID { get; set; }
    public string AddRemark { get; set; }
    public int UserId { get; set; }
    public DateTime InputDate { get; set; }
    public int? RemAttr { get; set; }
    public IList<OrganizationStructure> OrganizationStructures { get; private set; }
}

表

ID int未选中

名称nvarchar（MAX）已检查

组织ID int已检查

OrganizationStructureID int未选中

OrganizationTypeID int已检查

OrganizationLocationID int已检查

OrganizationActivityID int已检查

AddRemark nvarchar（MAX）已检查

UserId int已检查

输入日期日期时间检查

RemAttr int已检查

public ICommandResult Execute(CreateOrUpdateOrganizationStructureCommand command)
{
    var organizationStructure = new OrganizationStructure
    {
        ID = command.ID,
        Name = command.Name,
        OrganizationStructureID = command.OrganizationStructureID,
        OrganizationID = command.OrganizationID,
        OrganizationTypeID = command.OrganizationTypeID,
        OrganizationActivityID = command.OrganizationActivityID,
        OrganizationLocationID = command.OrganizationLocationID,
        AddRemark = command.AddRemark,
        UserId = command.UserId
    };
    if (organizationStructure.ID == 0)
        _organizationStructureRepository.Add(organizationStructure);
    else
        _organizationStructureRepository.Update(organizationStructure);
    _unitOfWork.Commit();
    return new CommandResult(true);
}

自引用表实体框架插入记录

OrganizationStructureID属性必须可以为null，否则将无法插入具有自动递增主键的记录。

即使OrganizationStructureID可以为null，EF也无法处理循环关系。您需要分两步保存它。

using (var scope = new TransactionScope())
{
     var context = new MyContext();
     var organizationStructure = new OrganizationStructure {/* assign props */ };
     context.OrganizationStructures.Add(organizationStructure);
     context.SaveChanges(); // step 1
     organizationStructure.OrganizationStructures.Add(organizationStructure);
     context.SaveChanges(); // step 2
     scope.Complete();
}
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