Question

我首先使用EF 6.1.1代码.NET framework 4，我有一个抽象基类BaseEntity，其中所有其他实体都从中继承。{1}}我的模型中有以下课程：

public abstract class BaseEntity 
{
    public int Id { get; set; }
    ....
}

public class Document:BaseEntity

public class OrderHeader:Document

public class RequestHeader:Document

我想通过定义以下映射文件来更改EF默认约定映射：

public class RequestHeader_Mapping : EntityTypeConfiguration<RequestHeader>
{
    public RequestHeader_Mapping()
    {                   
        this.ToTable("RequestHeader");
        this.Property(t => t.Id).HasColumnName("DocumentId");
        ...
    }
}

public class OrderHeader_Mapping : EntityTypeConfiguration<OrderHeader>
{
    public OrderHeader_Mapping()
    {                   
        this.ToTable("OrderHeader");
        this.Property(t => t.Id).HasColumnName("DocumentId");
        ...
    }
}

[更新]

public partial class Document_Mapping : BaseEntity_Mapping<Document>
{
    public Document_Mapping()
    {                   
        this.ToTable("Document");
        this.Property(t => t.Id).HasColumnName("Id");
        this.HasOptional(t => t.Creater).WithMany().HasForeignKey(d => d.CreatedById);
        this.HasOptional(t => t.Modifier).WithMany().HasForeignKey(d => d.ModifiedById);
        this.HasOptional(t => t.Owner).WithMany().HasForeignKey(d => d.OwnerId);
        this.HasOptional(t => t.DocumentStatu).WithMany().HasForeignKey(d => d.DocumentStatusId);
        this.HasOptional(t => t.DocumentStation).WithMany(t => t.Documents).HasForeignKey(d => d.DocumentStationId);
        this.HasOptional(t => t.DocumentType).WithMany().HasForeignKey(d => d.DocumentTypeId);
        this.HasOptional(t => t.DocumentFolder).WithMany().HasForeignKey(d => d.MainFolderId);
        this.HasOptional(t => t.SecurityLevel).WithMany).HasForeignKey(d => d.SecurityLevelId);

        this.Ignore(t => t.ToDocuments);
    }
}


public partial class BaseEntity_Mapping<TEntity> : EntityTypeConfiguration<TEntity> where TEntity:BaseEntity
{
    public BaseEntity_Mapping()
    {
        this.HasKey(e => e.Id);
         this.Property(t=>t.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
        this.Ignore(t => t.MustDelete);
        this.Ignore(t=>t.PreviousState);
        this.Ignore(t => t.State);
    }
}

并在我的DbContext中以下列方式使用它们：

 protected override void OnModelCreating(DbModelBuilder modelBuilder)
 {
     modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
     modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
     modelBuilder.Configurations.Add(new RequestHeader_Mapping());
     modelBuilder.Configurations.Add(new OrderHeader_Mapping());
     modelBuilder.Configurations.Add(new Document_Mapping());
 }

适用于RequestHeader，但不适用于OrderHeader，我的意思是RequestHeader表的生成密钥为DocumentId，但OrderHeader为Id {1}}但是，我真的很困惑，知道问题在哪里吗？

Answer 1

我的OrderHeader与另一个实体有一个零或一个关系，当我删除它时，问题就解决了！

映射首先不适用于EF代码中的一个实体

1 个答案: