我们如何在Entity Framework 7上配置约定？

Question

在EF7之前,我使用下面的snipet删除约定:

protected override void OnModelCreating(DbModelBuilder builder)
{
      builder.Conventions.Remove<NavigationPropertyNameForeignKeyDiscoveryConvention>();
      builder.Conventions.Remove<PrimaryKeyNameForeignKeyDiscoveryConvention>();
      builder.Conventions.Remove<PluralizingTableNameConvention>();
      builder.Conventions.Remove<PrimaryKeyNameForeignKeyDiscoveryConvention>();
      builder.Conventions.Remove<TypeNameForeignKeyDiscoveryConvention>();
}

我们如何在Entity Framework 7上实现相同的结果？

Answer 1

约定的API目前不稳定.请参阅https://github.com/aspnet/EntityFramework/issues/2589.

它可以完成,但它需要使用依赖注入来覆盖在OnModelCreating上下文中调用的内部工作方式.DbContext使用依赖注入来查找ModelSource提供模型构建器(和约定)的实例.

要覆盖模型源,请将您自己的实现添加到依赖项注入中:

    var serviceCollection = new ServiceCollection();
    serviceCollection
        .AddEntityFramework()
        .AddSqlServer();
    serviceCollection.AddSingleton<SqlServerModelSource, MyModelSource>();
    var serviceProvider = serviceCollection.BuildServiceProvider();

    using(var context = new MyContext(serviceProvider))
    {
        // ...
    }

你的实现MyModelSource应该覆盖ModelSource.CreateConventionSet().在这里查看原始来源