EntityFramework 7 Migrations 迁移命令

示例代码：

using Microsoft.Data.Entity;
using System.Collections.Generic;

namespace ClassLibrary1
{
    public class BloggingContext : DbContext
    {
        public DbSet<Blog> Blogs { get; set; }
        public DbSet<Post> Posts { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseSqlServer(@"Server=DESKTOP-2P9GHDD\SA;Database=BloggingContextDb;User ID=sa;Password=123456;");
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            // Make Blog.Url required
            modelBuilder.Entity<Blog>()
                .Property(b => b.Url)
                .IsRequired();
        }
    }

    public class Blog
    {
        public int BlogId { get; set; }
        public string Url { get; set; }

        public List<Post> Posts { get; set; }
    }

    public class Post
    {
        public int PostId { get; set; }
        public string Title { get; set; }
        public string Content { get; set; }

        public int BlogId { get; set; }
        public Blog Blog { get; set; }
    }
}

project.json 配置代码：

{
  "version": "1.0.0-*",
  "description": "ClassLibrary1 Class Library",
  "authors": [ "xishuai" ],
  "tags": [ "" ],
  "projectUrl": "",
  "licenseUrl": "",

  "frameworks": {
    "dnx451": { }
  },
  "dependencies": {
    "EntityFramework.Core": "7.0.0-rc1-final",
    "EntityFramework.Commands": "7.0.0-rc1-final",
    "EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final"
  },
  "commands": {
    "ef": "EntityFramework.Commands"
  }
}

命令行转到程序目录，运行 dnx ef，如果出现“找不到命令”提示，先运行 dnvm upgrade。

dnvm upgrade
dnu restore
cd src\MyProject

dnx ef
dnx ef migrations add MyMigration
dnx ef database update

dnx ef 命令：

dnx ef migrations add MyMigration 命令：

dnx ef database update 命令：

dnx ef migrations --help 帮助：

• database
  • update–Updates the database to a specified migration
• dbcontext
  • list–List your DbContext types
  • scaffold–Scaffolds a DbContext and entity type classes for a specified database
• migrations
  • add–Add a new migration
  • list–List the migrations
  • remove–Remove the last migration
  • script–Generate a SQL script from migrations

参考资料：

• EF7 Getting Started
• EF7 Migrations: DNX Commands