entity framework种子不起作用
我在我的web.config上有这个。
Global.asax APplication Start
Database.SetInitializer(new AppDataContextInitializer());
AppDataContextInitializer.cs
public class AppDataContextInitializer : System.Data.Entity.CreateDatabaseIfNotExists { protected override void Seed(AppDataContext context) { #region Seed Modules context.ModuleList.Add(new Module() { Id = 1, ModuleName = "Contabilidad", FontAwesomeClass = "ambulance" }); context.ModuleList.Add(new Module() { Id = 2, ModuleName = "Recursos Humanos", FontAwesomeClass = "heartbeat" }); context.ModuleList.Add(new Module() { Id = 3, ModuleName = "Inventario", FontAwesomeClass = "medkit" }); #endregion base.Seed(context); } }
AppDataContext.cs
public class AppDataContext : DbContext { public AppDataContext(): base("AppDataContext") { } public DbSet ModuleList { get; set; } protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Conventions.Remove(); } }
和module.cs
public class Module { [Key] public int Id { get; set; } public string ModuleName { get; set; } public string FontAwesomeClass { get; set; } }
但是我的数据库没有创建,我错过了什么?
更新1,我在global.asax上添加了这个
AppInitializacionHandler.Initialize();
我创建了这个类:
public class AppInitializacionHandler { public static void Initialize() { Database.SetInitializer(new AppDataContextInitializer()); //if u want to use your initializer using (var db = new AppDataContext()) { db.Database.Initialize(true); } } }
和初始化种子一样
已创建数据库但未添加ROWS。
如果您不访问数据库,则永远不会调用初始化程序。 如果要在应用程序开始调用Global.asax中的Initialize
方法时创建数据库:
context.Database.Initialize(true)();
更新1:
问题是你在不同的Database
实例中设置初始化程序,试试这个:
using (var db = new AppDataContext()) { db.Database.SetInitializer(new AppDataContextInitializer()); db.Database.Initialize(true); }
或者在DbContext
构造函数上设置Initializer:
public AppDataContext() { Database.SetInitializer(new AppDataContextInitializer()); }