在EF Core中应用所有IEntityTypeConfiguration派生的类

问题描述

是否有人知道将从 IEntityTypeConfiguration<> 派生的所有类应用于 DbContext 在运行时？

似乎没有内置任何东西，可以通过以下方式手动加载每个人：

 受保护的覆盖无效OnModelCreating（ModelBuilder modelBuilder）
 {
 modelBuilder.ApplyConfiguration（new Table1Config（））
 modelBuilder.ApplyConfiguration（new Table2Config（） ）
 ... 
 modelBuilder.ApplyConfiguration（new TableNConfig（））
} 
  

$ b对于具有很多表的数据库，$ b

将会变得相当乏味。

解决方案

对于EF Core< = 2.1

您可以编写如下扩展方法：

 公共静态class ModelBuilderExtensions 
 {
 public static void ApplyAllConfigurations（this ModelBuilder modelBuilder）
 {
 var typesToRegister = Assembly.GetExecutingAssembly（）。GetTypes（）。其中​​（t => t.GetInterfaces（）
 .Any（gi => gi.IsGenericType& gi.GetGenericTypeDefinition（）== typeof（IEntityTypeConfiguration<>）））。ToList（）; 
 
 foreach（typesToRegister中的变量类型）
 {
 dynamic configurationInstance = Activator.CreateInstance（type）; 
 modelBuilder.ApplyConfiguration（configurationInstance）; 
} 
} 
} 
  

然后在 OnModelCreating 如下：

 受保护的覆盖无效OnModelCreating（ModelBuilder modelBuilder）
 {
 base.OnModelCreating（modelBuilder）; 
 
 modelBuilder.ApplyAllConfigurations（）; 
} 
  

对于EF Core> = 2.2

在 EF Core 2.2 中，您不需要编写任何自定义扩展方法。 EF Core 2.2 为此目的添加了 ApplyConfigurationsFromAssembly 扩展方法。您可以按如下所示使用它：

 受保护的覆盖无效OnModelCreating（ModelBuilder modelBuilder）
 {
 base .OnModelCreating（modelBuilder）; 
 
 modelBuilder.ApplyConfigurationsFromAssembly（typeof（UserConfiguration）.Assembly）; //这里的UseConfiguration是任何IEntityTypeConfiguration 
} 
  

谢谢。

Does anyone know of a way or have an implementation to apply ALL classes that derive from IEntityTypeConfiguration<> to the DbContext at runtime?

There doesn't seem to be anything built in and loading each one manually via:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.ApplyConfiguration(new Table1Config())
    modelBuilder.ApplyConfiguration(new Table2Config())
    ...
    modelBuilder.ApplyConfiguration(new TableNConfig())
}

is going to prove rather tedious for a database with many tables.

解决方案

For EF Core <= 2.1

You can write an extension method as follows:

public static class ModelBuilderExtensions
{
    public static void ApplyAllConfigurations(this ModelBuilder modelBuilder)
    {
        var typesToRegister = Assembly.GetExecutingAssembly().GetTypes().Where(t => t.GetInterfaces()
            .Any(gi => gi.IsGenericType && gi.GetGenericTypeDefinition() == typeof(IEntityTypeConfiguration<>))).ToList();

        foreach (var type in typesToRegister)
        {
            dynamic configurationInstance = Activator.CreateInstance(type);
            modelBuilder.ApplyConfiguration(configurationInstance);
        }
    }
}

Then in the OnModelCreating as follows:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
   base.OnModelCreating(modelBuilder);

   modelBuilder.ApplyAllConfigurations();
}

For EF Core >= 2.2

From EF Core 2.2 you don't need to write any custom extension method. EF Core 2.2 added ApplyConfigurationsFromAssembly extension method for this purpose. You can just use it as follows:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
   base.OnModelCreating(modelBuilder);

   modelBuilder.ApplyConfigurationsFromAssembly(typeof(UserConfiguration).Assembly); // Here UseConfiguration is any IEntityTypeConfiguration
}

Thank you.

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