3
我跟着this教程，我試圖在userprofile表中添加一些新的列。我試圖創建一個新表。代碼第一次創建表
public class UsersContext : DbContext
{
public UsersContext()
: base("DefaultConnection")
{
}
public DbSet<UserProfile> UserProfiles { get; set; }
public DbSet<TestTabel> TestTabel { get; set; }
}
[Table("UserProfile")]
public class UserProfile
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int UserId { get; set; }
public string UserName { get; set; }
public string Mobile { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
}
[Table("TestTabel")]
public class TestTabel
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int TestId { get; set; }
public string TestName { get; set; }
public string TestMobile { get; set; }
}
比我嘗試更新與更新數據庫命令控制檯的數據庫，我得到這個錯誤信息：
目前已經在數據庫中命名爲「用戶配置」的對象。
未添加的新列，也沒有表。
我錯過了什麼？
[編輯] 我做的附加遷移和更新數據庫命令，這是出落得（不得不做了更新的數據庫命令兩次，第二次與詳細）
PM> Add-Migration
cmdlet Add-Migration at command pipeline position 1
Supply values for the following parameters:
Name: test
Scaffolding migration 'test'.
The Designer Code for this migration file includes a snapshot of your current Code First model. This snapshot is used to calculate the changes to your model when you scaffold the next migration. If you make additional changes to your model that you want to include in this migration, then you can re-scaffold it by running 'Add-Migration 201304011714212_test' again.
PM> Update-Database
The project 'MVC4SimpleMembershipCodeFirstSeedingEF5' failed to build.
PM> Update-Database
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
Applying code-based migrations: [201304011714212_test].
Applying code-based migration: 201304011714212_test.
Running Seed method.
PM> Update-Database -verbose
Using StartUp project 'MVC4SimpleMembershipCodeFirstSeedingEF5'.
Using NuGet project 'MVC4SimpleMembershipCodeFirstSeedingEF5'.
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
Target database is: 'aspnet-MVC4SimpleMembershipCodeFirstSeedingEF5' (DataSource: ., Provider: System.Data.SqlClient, Origin: Configuration).
No pending code-based migrations.
Running Seed method.
PM>
[ /編輯]
Configuration.cs：
namespace MVC4SimpleMembershipCodeFirstSeedingEF5.Migrations
{
internal sealed class Configuration : DbMigrationsConfiguration<UsersContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = true;
}
protected override void Seed(UsersContext context)
{
WebSecurity.InitializeDatabaseConnection(
"DefaultConnection",
"UserProfile",
"UserId",
"UserName", autoCreateTables: true);
if (!Roles.RoleExists("Administrator"))
Roles.CreateRole("Administrator");
if (!WebSecurity.UserExists("test"))
WebSecurity.CreateUserAndAccount(
"test",
"password",
new { Mobile = "+19725000374", FirstName = "test", LastName = "test" });
if (!Roles.GetRolesForUser("test").Contains("Administrator"))
Roles.AddUsersToRoles(new[] { "test" }, new[] { "Administrator" });
}
}
}
在Filters文件夾1 CS文件：
namespace MVC4SimpleMembershipCodeFirstSeedingEF5.Filters
{
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false,
Inherited = true)]
public sealed class InitializeSimpleMembershipAttribute : ActionFilterAttribute
{
private static SimpleMembershipInitializer _initializer;
private static object _initializerLock = new object();
private static bool _isInitialized;
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
// Ensure ASP.NET Simple Membership is initialized only once per app start
LazyInitializer.EnsureInitialized(ref _initializer, ref _isInitialized, ref _initializerLock);
}
private class SimpleMembershipInitializer
{
public SimpleMembershipInitializer()
{
Database.SetInitializer<UsersContext>(null);
try
{
using (var context = new UsersContext())
{
if (!context.Database.Exists())
{
// Create the SimpleMembership database without Entity Framework migration schema
((IObjectContextAdapter)context).ObjectContext.CreateDatabase();
}
}
WebSecurity.InitializeDatabaseConnection("DefaultConnection", "UserProfile", "UserId", "UserName", autoCreateTables: true);
}
catch (Exception ex)
{
throw new InvalidOperationException("The ASP.NET Simple Membership database could not be initialized. For more information, please see http://go.microsoft.com/fwlink/?LinkId=256588", ex);
}
}
}
}
}
連接字符串：
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
最後遷移：
namespace MVC4SimpleMembershipCodeFirstSeedingEF5.Migrations
{
using System;
using System.Data.Entity.Migrations;
public partial class test : DbMigration
{
public override void Up()
{
CreateTable(
"dbo.TestTabel",
c => new
{
TestId = c.Int(nullable: false, identity: true),
TestName = c.String(),
TestMobile = c.String(),
})
.PrimaryKey(t => t.TestId);
}
public override void Down()
{
DropTable("dbo.TestTabel");
}
}
}
你好，你運行'Add-Migrations' [命令]（http://msdn.microsoft.com/en-us/data/jj591621.aspx）腳手架更改，然後再運行'Update-Database' ？ – nkvu
嗨，是啊，我試過，順便說一句，忘了提到這一點。但它沒有奏效。 – Yustme