Question

无法确定相关操作的有效排序。由于外键约束，模型要求或存储生成的值，可能存在依赖关系。

ASP.NET MVC3实体框架4.1

我的模特

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）已选中

OrganizationID int Checked

OrganizationStructureID int未选中

OrganizationTypeID int Checked

OrganizationLocationID int Checked

OrganizationActivityID int Checked

AddRemark nvarchar（MAX）选中

UserId int已选中

InputDate datetime已检查

RemAttr int Checked

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);
}

Answer 1

OrganizationStructureID属性必须是可空的，否则您将无法使用自动递增的主键插入记录。

即使你有OrganizationStructureID可空，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();
}

自引用表实体框架插入记录？

表

1 个答案: