我正在使用MVC4做一个Web服务器。我有3个类 - 用户,MobileApp,设备。用户和设备类具有一对多关系(与User和MobileApp类相同)。我使用流畅的API来映射类:
public class User
{
public string UserID { get; set; }
public string UserLogin { get; set; }
public string UserPassword { get; set; }
public virtual ICollection<MobileApp> MobileApps { get; set; }
public virtual ICollection<Device> Devices { get; set; }
}
public class Device
{
public int DeviceID { get; set; }
public string DeviceName { get; set; }
public bool StolenFlag { get; set; }
public int BatteryLevel { get; set; }
public DbGeography LastLocalization { get; set; }
public int UserID { get; set; } //foreign key for user
public virtual User User { get; set; }
}
public class MobileApp
{
public int MobileAppId { get; set; }
public string MobileAppIID { get; set; }
public string MobileAppToken { get; set; }
public virtual User User { get; set; }
public int UserID { get; set; } //foreign key for user
}
映射
public class UserMapping : EntityTypeConfiguration<User>
{
public UserMapping():base()
{
this.HasKey(e => e.UserID);
this.HasRequired(e => e.UserLogin);
this.HasRequired(e => e.UserPassword);
this.HasMany<Device>(e => e.Devices).WithRequired(e => e.User).HasForeignKey(e => e.UserID);
this.HasMany<MobileApp>(e => e.MobileApps).WithRequired(e => e.User).HasForeignKey(e => e.UserID);
this.ToTable("User");
}
}
public class DeviceMapping:EntityTypeConfiguration<Device>
{
public DeviceMapping():base()
{
this.HasKey(e => e.DeviceID);
this.HasRequired(e => e.DeviceName);
this.HasRequired(e => e.LastLocalization);
this.ToTable("Device");
}
}
public class MobileAppMapping:EntityTypeConfiguration<MobileApp>
{
public MobileAppMapping():base()
{
this.HasKey(e => e.MobileAppId);
this.Property(e => e.MobileAppIID).HasMaxLength(150);
this.Property(e => e.MobileAppToken).HasMaxLength(150);
this.ToTable("MobileApp");
}
}
上下文:
public class AccountContext : DbContext
{
public AccountContext() : base("AccountDb")
{
}
public DbSet<User> Users { get; set; }
public DbSet<Device> Devices { get; set; }
public DbSet<MobileApp> MobileApps { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Configurations.Add(new UserMapping());
modelBuilder.Configurations.Add(new MobileAppMapping());
modelBuilder.Configurations.Add(new DeviceMapping());
}
}
初始化器:
public class AccountInitializer : DropCreateDatabaseIfModelChanges<AccountContext>
{
protected override void Seed(AccountContext context)
{
User user = new User() { UserLogin = "Test", UserPassword = "Test" };
Device device = new Device() { DeviceName = "Dev1", BatteryLevel = 100, StolenFlag = false, UserID = 1, LastLocalization = DbGeography.FromText("POINT(52.403371 16.955098)")};
MobileApp MobApp = new MobileApp() { MobileAppIID = "IID", MobileAppToken = "Token", UserID = 1 };
}
}
当我尝试使用ToList方法列出用户时,我得到以下内容:
“导航属性'DeviceName'不是'Device'类型的声明属性。验证它是否未从模型中明确排除,并且它是有效的导航属性。
答案 0 :(得分:0)
我认为DeviceMapping应该是this.Property(e =&gt; e.DeviceName).IsRequired(),并且可能与LastLocal化相同。