标签:style blog http color io os 使用 ar 数据
1. The model backing the ‘MusicStoreDBContext‘ context has changed since the database was created.
Consider using Code First Migrations to update the database
Movie这个表是用来记录Model的版本号的,你每次重新生成一次数据库它就会重新给ModelHash列赋一个新值。
和原始数据库就会产生差异.
2. 自动将数据库的表名变复数,导致错误
方法一:使用TableAttribute为实体类指定映射的表名
1 [Table("User")] 2 public class User 3 { 4 [Key] 5 public int Id { get; set; } 6 public string Usn { get; set; } 7 public string Pwd { get; set; } 8 public DateTime Created { get; set; } 9 }
方法二:重写OnModelCreating方法不允许将表名变为复数形式
public class UserContext : DbContext { public UserContext() : base("Name=SQLServer") { } protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Conventions.Remove<System.Data.Entity.ModelConfiguration.Conventions.PluralizingTableNameConvention>(); } public DbSet<User> User { get; set; } }
标签:style blog http color io os 使用 ar 数据
原文地址:http://www.cnblogs.com/qianjin253738234/p/4010783.html