实体框架种子数据未运行

Question

在Web API应用程序中运行Entity Framework 6.1。我有我的DatabaseContext设置，当我从包管理器控制台运行Update-Database时，数据库会正确创建和播种。

但是，如果我删除或手动创建数据库然后运行应用程序，实体框架将在数据库中创建表，但不会运行填充数据的种子方法。任何人都知道为什么种子数据不会运行？代码如下。

    namespace MyProject.API.DBMigrations
{
    using Microsoft.AspNet.Identity;
    using Microsoft.AspNet.Identity.EntityFramework;
    using System;
    using System.Collections.Generic;
    using System.Data.Entity;
    using System.Data.Entity.Migrations;
    using System.Linq;
    using MyProject.API.Infrastructure;
    using MyProject.Models.Business_Models;
    using MyProject.Models.Domain_Models;
    using MyProject.Models.Models;

    internal sealed class DatabaseConfiguration : DbMigrationsConfiguration<MyProject.API.Infrastructure.ApplicationDbContext>
    {
        public DatabaseConfiguration()
        {
            AutomaticMigrationsEnabled = true;
            AutomaticMigrationDataLossAllowed = true;
            MigrationsDirectory = @"DBMigrations";
        }

        protected override void Seed(MyProject.API.Infrastructure.ApplicationDbContext context)
        {
            //  This method will be called after migrating to the latest version.
            DatabaseSeeder.SeedSecurity(context);
            DatabaseSeeder.SeedBusiness(context);

            base.Seed(context);
        }
    }

    public class MyProjectDBInitializer : DropCreateDatabaseIfModelChanges<MyProject.API.Infrastructure.ApplicationDbContext>
    {
        // This Seed method is run when database is initialized if it is created if none exists
        protected override void Seed(MyProject.API.Infrastructure.ApplicationDbContext context)
        {
            DatabaseSeeder.SeedBusiness(context);
            DatabaseSeeder.SeedSecurity(context);

            base.Seed(context);
        }
    }

    public static class DatabaseSeeder
    {
        public static void SeedSecurity(MyProject.API.Infrastructure.ApplicationDbContext context)
        {
           //SEED Data added here (redacted for brevity)
        }

        public static void SeedBusiness(MyProject.API.Infrastructure.ApplicationDbContext context)
    {
      //SEED Data added here (redacted for brevity)
    }
    }
}

以下是我设置初始化程序的数据库上下文的一部分。我甚至尝试在global.asax中设置初始化程序，但这没有用。

    namespace MyProject.API.Infrastructure
{
    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    {
        public ApplicationDbContext()
            : base("DefaultConnection", throwIfV1Schema: false)
        {
            Configuration.LazyLoadingEnabled = true;
            System.Data.Entity.Database.SetInitializer<ApplicationDbContext>(new MyProjectDBInitializer());
        }

        // no change: this static ctor called the first time this type is referenced
        static ApplicationDbContext() {
            System.Data.Entity.Database.SetInitializer<ApplicationDbContext>(new MyProjectDBInitializer());
        }

        public static ApplicationDbContext Create()
        {
            return new ApplicationDbContext();
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            //Fluent api code here
            // Add foreign key constraint here or else nullable doesn't work when EF does savechanges
            modelBuilder.Entity<GiftCardTransaction>().Property(x => x.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);

            base.OnModelCreating(modelBuilder);
        }

    }
}