c# - EF 代码优先、播种和部署

Question

我想在安装时为我们的初始数据库添加用户(对于 ASP.NET 网络应用程序)。由于某种原因，它无法正常工作。我阅读了很多主题，其中大部分是说运行 update-database 这在控制台上运行良好，但它在生产环境中如何运行？

为了规避这一点，我最终得到了以下代码——我在这里遗漏了什么？

Global.asax.cs::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
    }
}

Answer 1

您必须执行以下步骤才能使其正常工作:

1) 将您的配置类设为公共(public)类，而不是内部(迁移配置)

2) 将此代码粘贴到您的 application_Start of global.asax:

// 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();
    }
}

希望对您有所帮助。