2

在我的项目中，我有一个应该映射到数据库的基类：

public abstract class EntityBase
{
    protected EntityBase()
    {
        UniqueId = Guid.NewGuid();
        CreationDate = DateTime.Now;
        LastModified = DateTime.Now;

    }

    #region Properties
    public Int64 Id { get; set; }
    public Guid UniqueId { get; set; }
    public byte[] Version { get; set; }
    public DateTime CreationDate { get; set; }
    public DateTime LastModified { get; set; }
    #endregion

    #region Navigation Properties
    public virtual long CreatedBy { get; set; }
    public virtual long UpdatedBy { get; set; }
    #endregion

}

并且一些实体具有共享属性，因此我为那些不应该映射的实体创建了另一个基础，甚至共享的属性也应该映射到它自己的实体中：

[Serializable]
public abstract class ApplicationEntityBase : EntityBase
{

    #region Properties
    public string Title { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
    public string Icon { get; set; }
    #endregion

}

现在的问题是当我尝试创建数据库时，Entity Framework 为 Entity Base 创建了大约 20 个表！

映射是：

 public class EntityMapping : EntityTypeConfiguration<EntityBase>
{
    public EntityMapping()
    {

        ToTable("Entity");

        HasKey(e => e.Id);
        Property(e => e.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
        Property(e => e.UniqueId).IsRequired();
        Property(e => e.Version).IsRequired().IsRowVersion();
        Property(e => e.CreationDate).IsRequired();
        Property(e => e.LastModified).IsRequired();
        Property(e => e.Order);
        Property(e => e.CreatedById).IsRequired();
        Property(e => e.UpdatedById).IsRequired();

    }
}

应用程序实体映射的示例是：

 public abstract class ApplicationMappingBase<TEntity> : EntityTypeConfiguration<TEntity>
   where TEntity : ApplicationEntityBase
{
    protected ApplicationMappingBase()
    {
        //Map(m => m.ToTable(typeof(TEntity).Name));

        Property(e => e.Title).IsRequired();
        Property(e => e.Name).IsRequired();
        Property(e => e.Description);
        Property(e => e.Icon);
    }
}

public class ActionMapping : ApplicationMappingBase<Entities.Core.Security.Action>
{
    public ActionMapping()
        : base()
    {
        Map(m => m.ToTable("Action"));

        Property(e => e.IsGeneral).IsRequired();
        Property(e => e.OnBefore).IsOptional();
        Property(e => e.OnAfter).IsOptional();
        Property(e => e.DoneMessage).IsOptional();
        HasMany(d => d.Activities).WithRequired(t => t.Action);
    }
}

你能告诉我我的代码有什么问题吗？难道我做错了什么？我阅读了很多文章，包括http://weblogs.asp.net/manavi/archive/2010/12/24/inheritance-mapping-strategies-with-entity-framework-code-first-ctp5-part-1-table- per-hierarchy-tph.aspx但没有发现与我的情况相同的情况

4

0 回答 0