Question

我有以下模型对象

public class UserEntry
{
    public int UserEntryID { get; set; }
    public string UserID { get; set; }
    public string TeamName { get; set; }
    public int Total { get; set; }

    public virtual ICollection<EntryPlayer> EntryPlayers { get; set; }
}
public class EntryPlayer
{
    public int EntryPlayerID { get; set; }
    public bool Captain { get; set; }
    public virtual int UserEntryID { get; set; }

    public virtual Player Player { get; set; }
}
public class Player
{
    public int PlayerID { get; set; }
    public string FirstName { get; set; }
    public string MiddleInitial { get; set; }
    public string LastName { get; set; }
    public int Group { get; set; }
    public string Team { get; set; }
    public int Score { get; set; }
}

我的数据库架构如下所示： -

当我尝试使用此代码加载UserEntry时： -

UserEntry userEntry = this.db.UserEntries
                .Where(u => u.UserID == user.Id)
                .Include("EntryPlayers")
                .FirstOrDefault();

我收到错误：

Invalid column name 'Player_PlayerID'

如果我更改Player对象的UserEntry属性：

public virtual Player Player { get; set; }

为：

public virtual int PlayerID { get; set; }

然后我的UserEntry对象加载正常，但显然只有PlayerID而不是整个Player对象。

我需要更改哪些内容才能在Player中加载UserEntry对象？

我也有这个DatabaseInitializer类

namespace ACS.Models {

public class ACSDatabaseInitializer : CreateDatabaseIfNotExists<ACSContext>
{

   protected override void Seed(ACSContext context)
   {
       base.Seed(context);

       var players = new List<Player>();

       players.Add(new Player
       {
            PlayerID = 1, 
            FirstName = "Dave",
            MiddleInitial = "",
            LastName = "Smith",
            Group = 1,
            Team = "Team1",
            Score = 0
       });

       players.ForEach(p => context.Players.Add(p));

       context.SaveChanges();
     }
  }
}

和这个Context类

namespace ACS.Models
{
    public class ACSContext : DbContext
    {
        public ACSContext()
        : base("name=ACS")
        {
            Database.SetInitializer<ACSContext>(null);
        }

        public DbSet<Player> Players { get; set; }
        public DbSet<UserEntry> UserEntries { get; set; }
        public DbSet<EntryPlayer> EntryPlayers { get; set; }
    }
 }

Answer 1

我需要在UserEntry对象上同时使用PlayerID属性和Player属性才能使其工作

实体框架包含错误

1 个答案: