實體框架遷移，域外mvc4，簡單會員

Question

我喜歡有MVC4以外的域。因此，我的migrations文件夾位於域項目中。

至於其他人，我想用種子由Web安全創建的表：由SimpleMembershipProvider創建 http://odetocode.com/Blogs/scott/archive/2012/08/31/seeding-membership-amp-roles-in-asp-net-mvc-4.aspx

表不暴露我的DbContext和播種這些表的唯一方式是通過使用代碼從鏈接。很顯然，這段代碼在我的域名項目中不起作用。

在使用遷移時，MVC4以外的域項目是否意味着我無法再使用SimpleMembershipProvider？還是有一種將這三種東西結合在一起的巧妙方式？

對不起，如果這是一個有點愚蠢的問題，因爲我剛剛轉移到MVC4。謝謝

Answer 1

我面臨同樣的問題，我想出的解決方案是在配置器中公開種子事件，並讓應用程序訂閱SimpleMembership種子。

首先，配置：

internal sealed class Configuration : DbMigrationsConfiguration<MyContext> 
    { 
     public event EventHandler<MyContext> OnSeed; 

     public Configuration() 
     { 
      AutomaticMigrationsEnabled = false; 
     } 

     protected override void Seed(MyContext context) 
     { 
      var onSeed = this.OnSeed; 
      if (onSeed != null) 
       onSeed(this, context); 

      // This method will be called after migrating to the latest version. 

      // You can use the DbSet<T>.AddOrUpdate() helper extension method 
      // to avoid creating duplicate seed data. E.g. 
      // 
      // context.People.AddOrUpdate(
      //  p => p.FullName, 
      //  new Person { FullName = "Andrew Peters" }, 
      //  new Person { FullName = "Brice Lambson" }, 
      //  new Person { FullName = "Rowan Miller" } 
      // ); 
      // 
     } 
    } 

然後，爲了能夠與Database.SetInitializer使用它，我創建了自己IDatabaseInitializer的基礎上，MigrateDatabaseToLatestVersion。這很容易做，因爲，如this post所說（你可以檢查here），它只是DbMigration的一個包裝。

public class MyDatabaseInitializer : IDatabaseInitializer<MyContext> 
{ 
    private readonly Configuration config; 

    public event EventHandler<MyContext> OnSeed 
    { 
     add { if (this.config != null) this.config.OnSeed += value; } 
     remove { if (this.config != null) this.config.OnSeed -= value; } 
    } 

    /// <summary> 
    ///  Initializes a new instance of the MigrateDatabaseToLatestVersion class. 
    /// </summary> 
    public MyDatabaseInitializer() 
    { 
     this.config = new Configuration(); 
    } 

    /// <summary> 
    ///  Initializes a new instance of the MigrateDatabaseToLatestVersion class that will 
    ///  use a specific connection string from the configuration file to connect to 
    ///  the database to perform the migration. 
    /// </summary> 
    /// <param name="connectionStringName"> The name of the connection string to use for migration. </param> 
    public MyDatabaseInitializer(string connectionStringName) 
    { 
     Contract.Requires(!string.IsNullOrWhiteSpace(connectionStringName)); 

     this.config = new Configuration 
         { 
          TargetDatabase = new DbConnectionInfo(connectionStringName) 
         }; 
    } 

    /// <inheritdoc /> 
    public void InitializeDatabase(MyContext context) 
    { 
     var migrator = new DbMigrator(config); 
     migrator.Update(); 
    } 
} 

在這個初始值設定項中，我公開地公開了OnSeed事件。在App_Start中，在MVC項目中，我訂閱它以播種SimpleMembership數據。

var initializer = new PoipDatabaseInitializer(); 
initializer.OnSeed += (s, e) => SeedSecurity(); 
Database.SetInitializer(initializer); 


private static void SeedSecurity() 
    { 
     WebSecurity.InitializeDatabaseConnection("MyDatabase", "UserProfile", "UserId", "UserName", autoCreateTables: false); 

     if (!Roles.RoleExists("SysAdmin")) 
      Roles.CreateRole("SysAdmin"); 

     if (!WebSecurity.UserExists("sysadmin")) 
      WebSecurity.CreateUserAndAccount(
       "sysadmin", 
       "password" 
      ); 

     if (!Roles.GetRolesForUser("sysadmin").Contains("SysAdmin")) 
      Roles.AddUsersToRoles(new[] { "sysadmin" }, new[] { "SysAdmin" }); 
    }