首先是EF代码,播种和部署

时间:2013-08-02 13:10:03

标签: c# asp.net entity-framework ef-code-first

我想在安装时为用户(对于ASP.NET Web应用程序)播种我们的初始数据库。由于某种原因,它无法正常工作。我已经阅读了很多主题,主要是说运行update-database从控制台运行良好,但这在生产环境中如何工作?

为了避免这种情况,我最终得到了以下代码 - 我在这里缺少什么?

的Global.asax.cs ::的Application_Start()

try
{
    initializationError = null;
    WebSecurity.InitializeDatabaseConnection("DefaultConnection", "UserProfile", "UserId", "UserName", autoCreateTables: true);
}
catch (Exception ex)
{
    initializationError = ex;
}

// Initialize database and seed data
Database.SetInitializer(new EntitiesContextInitializer());

// Now initialize it
using (var context = new EMUI.Models.UsersContext())
{
    if (!context.Database.Exists())
    {
        context.Database.Initialize(true);
    }
}

EntitiesContextInitializer

internal sealed class EntitiesContextInitializer : MigrateDatabaseToLatestVersion<EMUI.Models.UsersContext, Configuration>
{
}

配置

internal sealed class Configuration : DbMigrationsConfiguration<EMUI.Models.UsersContext>
{
    public Configuration()
    {
        AutomaticMigrationsEnabled = true;
    }

    protected override void Seed(EM.Models.UsersContext context)
    {
        if (!WebSecurity.Initialized)
        {
            WebSecurity.InitializeDatabaseConnection("DefaultConnection", "UserProfile", "UserId", "UserName", autoCreateTables: true);
        }

        if (!Roles.RoleExists("Administrator"))
        {
            Roles.CreateRole("Administrator");
        }

        // More similar seeding
    }
}

1 个答案:

答案 0 :(得分:1)

您必须执行以下步骤才能使其正常工作:

1)使您的Configuration类成为公共类,而不是internal(迁移配置)

2)将此代码粘贴到global.asax的application_Start:

// Now initialize it
using (var context = new EMUI.Models.UsersContext())
{
    if (!context.Database.Exists())
    {
            Configuration configuration = new Configuration();
            configuration.ContextType = typeof(EMUI.Models.UsersContext);
            var migrator = new DbMigrator(configuration);
            migrator.Update();
    }
}

希望它有所帮助。