ASP.NET MVC /实体框架错误 - 无效的列名称Environment_Id“

Question

我新的ASP.NET MVC和EF希望这不是一个愚蠢的问题

当我通过模型来查看我越来越此错误 - 异常详细信息：System.Data.SqlClient.SqlException：无效的列名称'Environment_Id'。

模型和数据库表具有该名称的属性。有没有人能指导我呢？

**Here is the Version Model Class** 

    public partial class Version 
    { 
    public Version() 
    { 
     this.ProfileVersions = new List<ProfileVersion>(); 
     this.ServerInfoes = new List<ServerInfo>(); 
    } 

    public int Id { get; set; } 
    public string Number { get; set; } 
    public string Tag { get; set; } 
    public string Owner { get; set; } 
    public string Approver { get; set; } 
    public string Description { get; set; } 
    public virtual ICollection<ProfileVersion> ProfileVersions { get; set; } 
    public virtual ICollection<ServerInfo> ServerInfoes { get; set; } 
} 

**Profile Version Class** 

public partial class ProfileVersion 
{ 
    public ProfileVersion() 
    { 
     this.PlatformConfigurations = new List<PlatformConfiguration>(); 
    } 

    public int Id { get; set; } 
    public int ProfileId { get; set; } 
    public int EnvironmentId { get; set; } 
    public int VersionId { get; set; } 
    public Nullable<bool> Locked { get; set; } 
    public string LockedBy { get; set; } 
    public string Comments { get; set; } 
    public Nullable<int> Active { get; set; } 
    public virtual Environment Environment { get; set; } 
    public virtual ICollection<PlatformConfiguration> PlatformConfigurations { get; 
                      set; } 
    public virtual PlatformProfile PlatformProfile { get; set; } 
    public virtual Version Version { get; set; } 
} 

**ServerInfo** 
public partial class ServerInfo 
{ 
    public ServerInfo() 
    { 
     this.PlatformConfigurations = new List<PlatformConfiguration>(); 
    } 

    public int Id { get; set; } 
    public string ServerName { get; set; } 
    public int ProfileId { get; set; } 
    public int VersionId { get; set; } 
    public int EnvironmentId { get; set; } 
    public string ServerType { get; set; } 
    public Nullable<short> Active { get; set; } 
    public string Domain { get; set; } 
    public string Location { get; set; } 
    public string IP { get; set; } 
    public string Subnet { get; set; } 
    public string Gateway { get; set; } 
    public Nullable<int> VLan { get; set; } 
    public string DNS { get; set; } 
    public string OS { get; set; } 
    public string OSVersion { get; set; } 
    public string Func { get; set; } 
    public Nullable<short> IISInstalled { get; set; } 
    public string ADDomainController { get; set; } 
    public string ADOrganizationalUnit { get; set; } 
    public string ADGroups { get; set; } 
    public string LastError { get; set; } 
    public Nullable<System.DateTime> LastUpdate { get; set; } 
    public virtual Environment Environment { get; set; } 
    public virtual ICollection<PlatformConfiguration> PlatformConfigurations { get;  
                      set; } 
    public virtual PlatformProfile PlatformProfile { get; set; } 
    public virtual Version Version { get; set; } 
    public virtual VMConfiguration VMConfiguration { get; set; } 
} 

**Controller Code-** 

public ViewResult Index(string id) 
    { 

     var profileVerList = from ver in _context.Versions 
           where !(from pfv in _context.ProfileVersions 
            select pfv.VersionId).Contains(ver.Id) 
           select ver; 

     var bigView = new BigViewModel 
     { 
      VersionModel = profileVerList.ToList(),     
     }; 

     return View(model: bigView); 
    } 


**In the View where the exception is thrown** 

@Html.DropDownList(
      "SelectedVersionID", 
      new SelectList(
       Model.VersionModel.Select(x => new { Value = x.Id, Text = x.Number}), 
       "Value", 
       "Text" 
       ) 
      ) 

Answer 1

在你ProfileVersion和ServerInfo实体你有一个Environment导航属性。默认情况下，实体框架将尝试创建一个名为[Property Name]_[Referenced class PK]的数据库列。在你的场景中，这是Environment_Id。现在的问题是，您尚未进行迁移来创建此数据库列。

如果我不得不想象这里发生了什么事，我说你先用EnvironmentId属性创建的类，迁移，然后再决定增加导航性能，Environment每个，期待EF关联与您现有的EnvironmentId属性。那是你出错的地方。正如我前面所说，EF惯例是，寻找名为Environment_Id数据库列，所以如果你想EF使用EnvironmentId相反，你只需要与ForeignKey数据注解来告诉它这样：

[ForeignKey("Environment")] 
public int EnvironmentId { get; set; } 

Answer 2

在我的情况我已将我的主键关系添加到相同的键..所以我只是删除..