使用EntityTypeConfiguration< T>时抽象域模型基类

问题描述

获取Base对象属性的中央映射有一些技巧吗？
当使用EntityTypeConfiguration时，抽象类有一些简单的模式。

非常感谢任何提示。
我无法声明一个类

 公共类BaseEntityConfig< T> ：EntityTypeConfiguration< T> 
  

类似的问题，我无法得到工作答案

和

  public abstract class BosBaseObject 
 {
 public virtual Guid Id {set;得到; } 
 public virtual string ExternalKey {set;得到; } 
 public byte [] RowVersion {get;组; } 
} 
 public class新闻：BosBaseObject 
 {
 public String Heading {set;得到; } 
} 
 
 
 public class NewsMap：EntityTypeConfiguration< News> 
 {
 public NewsMap（）
 {
 // Base Object Common Mappings 
 //我们如何使用所有基本抽象属性的中央映射
 
 
} 
} 
 //这样的东西，但对任何建议都很开放.... 
 public class BosBaseEntityConfig< T> ：EntityTypeConfiguration< T> 
 {
 public void BaseObjectMap（）
 {
 //主键
 this.HasKey（t => t.Id）; 
 
 //属性
 this.Property（t => t.Id）.HasDatabaseGeneratedOption（databaseGeneratedOption：DatabaseGeneratedOption.None）; 
 
 this.Property（t => t.RowVersion）
 .IsRequired（）
 .IsFixedLength（）
 .HasMaxLength（8）
。 IsRowVersion（）; 
 
 //列映射
 this.Property（t => t.Id）.HasColumnName（Id）; 
} 
} 
  

解决方案

之后6小时我破解了我认为这是一个相当干净的结果。
诀窍是忘记从EntityTypeConfiguration
派生的类中的每个内部，并构建一个自定义BaseConfig，然后获取此实例并添加此类的具体信息。希望它帮助别人首先使用抽象...

  public abstract class BosBaseObject 
 {
 public虚拟Guid Id {set;得到; } 
 public virtual string ExternalKey {set;得到; } 
 public byte [] RowVersion {get;组; } 
} 
 public abstract class BosObjectDateManaged：BosBaseObject 
 {
 public DateTimeOffset ValidFrom {set;得到; } 
 public DateTimeOffset ValidTo {set;得到; 
} 
 public class新闻：BosObjectDateManaged 
 {
 public String标题{set;得到; 
 
 
 
 
 protected override void OnModelCreating（DbModelBuilder modelBuilder）
 {
 var conf = new BosBaseEntityConfiguration< News>（）; //为Type 
构造配置modelBuilder.Configurations.Add（conf）; //这里现在有基础映射
 var newsConf = new NewsConfiguration（conf）; //现在对象的特定属性东西
 
} 
 
} 
 public class BosBaseEntityConfiguration< T> ：EntityTypeConfiguration< T>其中T：BosBaseObject 
 {
 public BosBaseEntityConfiguration（）
 {
 //主键
 this.HasKey（t => t.Id）; 
 
 ////属性
 this.Property（t => t.Id）.HasDatabaseGeneratedOption（databaseGeneratedOption：DatabaseGeneratedOption.None）; 
 
 this.Property（t => t.RowVersion）
 .IsRequired（）
 .IsFixedLength（）
 .HasMaxLength（8）
。 IsRowVersion（）; 
 
 //列映射
 this.Property（t => t.Id）.HasColumnName（Id）; 
} 
} 
 public class NewsConfiguration 
 {
 public NewsConfiguration（BosBaseEntityConfiguration< News> entity）
 {
 // Table Specific&列映射
 entity.ToTable（News2）; 
 entity.Property（t => t.Heading）.HasColumnName（Heading2）; 
} 
} 
  

Is there some trick to getting a central mapping of Base object properties?Is there some simple pattern for abstract classes when using EntityTypeConfiguration.
ANy tips much appreciated.Im unable to declare a class

Public class BaseEntityConfig<T> : EntityTypeConfiguration<T>

Similar issues, where i couldnt get the answers to workHow to create and use a generic class EntityTypeConfiguration<TEntity>and Dynamic way to Generate EntityTypeConfiguration : The type 'TResult' must be a non-nullable value type

public  abstract class BosBaseObject
{
  public virtual Guid Id { set; get; }
  public virtual string ExternalKey { set; get; }
  public byte[] RowVersion { get; set; }
}
  public class News : BosBaseObject
{
    public String Heading { set; get; }
}


public class NewsMap : EntityTypeConfiguration<News>
{
    public NewsMap()
    {
      //Base Object Common Mappings
      // How can we use a central mapping for all Base Abstract properties  


     }
 }
// Something like this but very open to any suggestion....
public class BosBaseEntityConfig<T> : EntityTypeConfiguration<T>
{
  public void BaseObjectMap( )
    { 
        // Primary Key
        this.HasKey(t => t.Id);

        // Properties
        this.Property(t => t.Id).HasDatabaseGeneratedOption(databaseGeneratedOption: DatabaseGeneratedOption.None);

        this.Property(t => t.RowVersion)
            .IsRequired()
            .IsFixedLength()
            .HasMaxLength(8)
            .IsRowVersion();

        //Column Mappings
        this.Property(t => t.Id).HasColumnName("Id");
    }
}

解决方案

After 6 hrs I cracked it. I think it is a reasonably clean outcome.The trick is to forget doing every inside a class derived from EntityTypeConfigurationand build a custom BaseConfig and then to take this instance and add the specifics for this class. Hope it helps others doing code first with abstracts...

public  abstract class BosBaseObject
{
  public virtual Guid Id { set; get; }
  public virtual string ExternalKey { set; get; }
  public byte[] RowVersion { get; set; }
}
 public abstract class BosObjectDateManaged   :  BosBaseObject
{
    public DateTimeOffset ValidFrom { set; get; }
    public DateTimeOffset ValidTo { set; get; }
}
public class News : BosObjectDateManaged
{
    public String Heading { set; get; }
}



protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        var conf = new BosBaseEntityConfiguration<News>();//Construct config for Type
        modelBuilder.Configurations.Add( conf );  // this has base mapping now
        var newsConf = new NewsConfiguration(conf); // now the Object specific properties stuff

    }

}
public class BosBaseEntityConfiguration<T> : EntityTypeConfiguration<T> where T : BosBaseObject
{
   public BosBaseEntityConfiguration()
   {
       // Primary Key
       this.HasKey(t => t.Id);

       //// Properties
       this.Property(t => t.Id).HasDatabaseGeneratedOption(databaseGeneratedOption: DatabaseGeneratedOption.None);

       this.Property(t => t.RowVersion)
           .IsRequired()
           .IsFixedLength()
           .HasMaxLength(8)
           .IsRowVersion();

       //Column Mappings
       this.Property(t => t.Id).HasColumnName("Id");
   }
}
 public class NewsConfiguration  
{
    public  NewsConfiguration(BosBaseEntityConfiguration<News> entity)
    {
        // Table Specific & Column Mappings
        entity.ToTable("News2");
        entity.Property(t => t.Heading).HasColumnName("Heading2");
    }
}

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