实体框架（代码优先） - 动态构建模型 [英] Entity Framework (Code First) - Dynamically Building a Model

问题描述

我有我的课域的集会 - Domains.dll。我动态添加到组装我的DbContext Dbset加载类

I have an assembly with classes my domains - "Domains.dll". I dynamically add to my DbContext Dbset load classes of assembly.

public class MyContext : DbContext
{
   public MyContext() : base("DBConnection"){}

   protected override void OnModelCreating(DbModelBuilder modelBuilder)
   {
       Assembly assembly = Assembly.LoadFrom("Domains.dll");
       var entityMethod = typeof(DbModelBuilder).GetMethod("Entity");
       var list = assembly.GetTypes().OrderBy(i => i.GetType().Name);
       foreach (Type item in list)
       {
           entityMethod.MakeGenericMethod(item)
     .Invoke(modelBuilder, new object[] { });
       }

   }
}

接下来，我创建数据库

Next, I create DataBase

context.Database.Create();

这工作，但与我的域名的一个问题。我对父实体

This works but with a problem for my domain. I have a class for the parent entity

public abstract class Entity
{
    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int Id { get; set; }
}

public class Person : Entity
{
   public string FirstName {get ;set;}
   public string LastName {get ;set;}
} 

如果现在我运行一个数据库 - 表'人'是不是create.It创建一个表'实体'有场标识，名字，姓氏。

If now I run a database - table 'Person' is not create.It creates a table 'Entities' with fields Id, FirstName, LastName.

如果我改变人

public class Person 
{
   public int Id {get; set;}
   public string FirstName {get ;set;}
   public string LastName {get ;set;}
} 

那么数据库的两个表中创建 - '人'和'实体'。如何使用继承？我该怎么做是正确的？

then created in the database two tables - 'Person' and 'Entities'. How do I use inheritance? How do I do it right?

推荐答案

尝试使用 [表（人）] 属性，我鼓励你看看那的与EF代码优先继承，这是一个不错的职位。

Try using [Table("Person")] Attribute, and I encourage you to take a look at that Inheritance with EF Code First, It is a good post.

所以要恢复试试这个：

public abstract class Entity
{
    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int Id { get; set; }
}
[Table("Person")]
public class Person : Entity
{
   public string FirstName {get ;set;}
   public string LastName {get ;set;}
} 

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