使用现有数据库时的实体框架IDENTITY_INSERT问题

Question

我正在使用现有数据库的实体框架。我在该数据库中更改了一个表的列，当我尝试将记录插入该关系时出现此错误：

... IDENTITY_INSERT设置为OFF

实际上，身份设置为ON。我想这个问题是对表进行的更新。由于没有创建模型，我如何通知EF有关此更新的信息。 Ť 这是我的控制器

    [HttpPost]
    public JsonResult SaveReview( Review review, HttpPostedFileBase image ) {
        string userID = Membership.GetUser().ProviderUserKey.ToString();
        review.UserID = userID;
        review.Date = DateTime.Now;
        reviewRepository.SaveReview( review );
 }

public class EFReviewRepository : IReviewRepository{
    private EFDbContext context = new EFDbContext();

    public IQueryable<Review> Reviews {
        get {
            return context.Reviews;
        }
    }


    public void SaveReview( Review review ) {
        context.Reviews.Add( review );
        context.SaveChanges();
    }


}

ReviewID    int //auto-increment field
UserID  nvarchar(50)    
HotelID int 
Title   nvarchar(100)   
[Content]   text    
Date    date    
Rating  int 

最后，评论模型是：

 /**A Hotel Review entity*/
public class Review {
    [ScaffoldColumn( false )]
    public int ReviewID { get; set; }

    [ScaffoldColumn( false )]
    public string UserID { get; set; }

    [ScaffoldColumn( false )]
    [Key, ForeignKey( "Hotel" ), Column(Order = 1)]
    public int HotelID { get; set; }
    public virtual Hotel Hotel { get; set; }

    [Required( ErrorMessage = "Please enter a Title" )]
    public string Title { get; set; }

    [Required( ErrorMessage = "Please enter a description" )]
    [DataType( DataType.MultilineText )]
    public string Content { get; set; }

    public DateTime Date { get; set; }

    [Required( ErrorMessage = "Please enter a rating" )]
    public int Rating { get; set; }
}