C# 连接实体框架关系的更简单方法?
为了规范化,我已经分离了几个模型,它们都应该是一对一的关系。由于在EF中进行1对1关系的难度,我已完成以下工作:C# 连接实体框架关系的更简单方法?,c#,entity-framework,asp.net-mvc-4,entity-relationship,C#,Entity Framework,Asp.net Mvc 4,Entity Relationship,为了规范化,我已经分离了几个模型,它们都应该是一对一的关系。由于在EF中进行1对1关系的难度,我已完成以下工作: public class Fleet : SpaceObject { public int Id{ get; set; } public int? ActiveCaptainId { get; set; } public int? ResourcesId { get; set; } [ForeignKey("ActiveCaptainId")]
public class Fleet : SpaceObject
{
public int Id{ get; set; }
public int? ActiveCaptainId { get; set; }
public int? ResourcesId { get; set; }
[ForeignKey("ActiveCaptainId")]
[Display(Name = "Captain in Command")]
public virtual Captain ActiveCaptain { get; set; }
[ForeignKey("ResourcesId")]
public virtual Resources Resources { get; set; }
}
public class Captain
{
public int Id{ get; set; }
public int? FleetId { get; set; }
[ForeignKey("FleetId")]
public virtual Fleet Fleet { get; set; }
}
public class Resources
{
public int Id{ get; set; }
public int? FleetId { get; set; }
[ForeignKey("FleetId")]
public virtual Fleet Fleet { get; set; }
}
创建新用户时,我:
- 首先创造一个队长
- SaveChanges()
- 然后创建一个舰队并将队长分配给舰队
- SaveChanges()
- 然后创建一个资源并将舰队分配给资源
- SaveChanges()
- 然后将舰队分配给船长,并将资源分配给舰队
Captain newCapt = new Captain();
newCapt.Name = model.
newCapt.UserId = db.UserProfiles.FirstOrDefault(p=>p.UserName == model.UserName).UserId;
db.Captains.Add(newCapt);
db.SaveChanges();
//----Make a new Fleet
Fleet newFleet = new Fleet();
newFleet.ActiveCaptain = newCapt;
newFleet.UserId = db.UserProfiles.FirstOrDefault(p=>p.UserName == model.UserName).UserId;
db.Fleets.Add(newFleet);
db.SaveChanges(); //commit the changes to the database
Resources resources = new Resources();
resources.Fleet = newFleet;
db.Resources.Add(resources);
db.SaveChanges();
newFleet.Resources = resources;
newCapt.Fleet = newFleet;
db.Entry(newFleet).State = System.Data.EntityState.Modified;
db.Entry(newCapt).State = System.Data.EntityState.Modified;
db.SaveChanges();
我觉得必须有一个更简单的方法来做到这一点。有没有一种方法可以使它在创建一个新的舰队后,创建一个新的资源入口和船舶入口,等等?我认为这不可能的唯一原因是,在舰队保存到数据库之前,我无法将舰队的主键链接到资源/船长/船只等