永远不会调用OnModelCreating [英] OnModelCreating is never called

问题描述

我开始使用实体框架。
问题是从来没有调用过我的OnModelCreating方法。

I am starting work with entity framework. Problem is that my OnModelCreating method is never called.

这是我的上下文类：

public class TestContext : DbContext
    {
        public TestContext()
            : base("name=TestDBConnectionString")
        { }

        public DbSet<WorkItem> WorkItems { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
        }
    }

连接字符串

 <add name="TestDBConnectionString"
      connectionString="Data Source=(LocalDB)\v11.0;Initial Catalog=TestDB;Integrated Security=true"
      providerName="System.Data.SqlClient"/>

我希望在致电时进入OnModelCreating：

I expect to go into OnModelCreating when I call:

 using (var context = new TestContext())
        {

        }

我在哪里弄错了？

推荐答案

尝试添加一个

赞

using (var context = new TestContext())
{
    context.WorkItem.Add(new WorkItem()); //Construct valid entity
    context.SaveChanges();
}

根据默认策略，如果没有，它将尝试创建数据库。不存在。否则至少会引发异常。

By default strategy, it will try to create a database, if it doesn't exist. Or at least will throw an exception.

或者您可以强制其在启动时创建数据库

Or you can force it to create database at start up

context.Database.Initialize（true）;

context.Database.Initialize(true);

https://msdn.microsoft.com/en-us/library/ system.data.entity.database.initialize（v = vs.113）.aspx

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