实体框架-重用复杂类型
本文关键字:复杂 类型 -重 框架 实体 | 更新日期: 2023-09-27 18:29:22
我在代码优先实体框架中有一个实体,目前看起来像这样:
public class Entity
{
// snip ...
public string OriginalDepartment { get; set; }
public string OriginalQueue { get; set; }
public string CurrentDepartment { get; set; }
public string CurrentQueue { get; set; }
}
我想为这些类型创建复杂类型,如下所示:
public class Location
{
public string Department { get; set; }
public string Queue { get; set; }
}
我想使用相同类型的当前和原始:
public Location Original { get; set; }
public Location Current { get; set; }
这可能吗?还是我需要创建两个复杂类型CurrentLocation
和OriginalLocation
?
public class OriginalLocation
{
public string Department { get; set; }
public string Queue { get; set; }
}
public class CurrentLocation
{
public string Department { get; set; }
public string Queue { get; set; }
}
它是开箱即用的,您不需要创建两个复杂的类型。
您还可以使用模型生成器显式地配置您的复杂类型
modelBuilder.ComplexType<Location>();
要自定义列名,您应该从父实体配置中配置它们
public class Location
{
public string Department { get; set; }
public string Queue { get; set; }
}
public class MyEntity
{
public int Id { get; set; }
public Location Original { get; set; }
public Location Current { get; set; }
}
public class MyDbContext : DbContext
{
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.ComplexType<Location>();
modelBuilder.Entity<MyEntity>().Property(x => x.Current.Queue).HasColumnName("myCustomColumnName");
}
}
这将把MyEntity.Current.Queue
映射到myCustomName
列