Question

我正在轮询多个系统（域）以获取安全信息，因此我正在处理domainUsers及其角色。我的实体设置如下图所示，但是我在设置AutoMapper覆盖中的domainUser.HasMany关系时遇到了麻烦。

你会注意到我没有domainUser.DomainUserId和role.RoleId这使得这更简单（没有compositeIds。）我已经避免了这些字段，因为我已经有了一个自然的复合键，它会当我从下游域中提取此数据时，请填充。如果我添加这些人工密钥，我必须在调用session.Merge（domainUser）之前预先获取它们的值。我试图避免这样做。

实体对象很明显（我希望），但这就是我所拥有的。

public class DomainUser 
   {
      public virtual int Domain_Id { get; set; }
      public virtual string DomainUserLogin { get; set; }
      public virtual string EmployeeId { get; set; }

      // extra field removed for breviety


      public DomainUser()
      {
         this.Roles = new List<DomainUserRole>();
      }

      public virtual void AddRole(DomainUserRole role)
      {
         role.DomainUser = this;
         this.Roles.Add(role);
      }

      // overrides for equals and getHashCode
   }

和

   public class DomainUserRole
   {
      public virtual DomainUser DomainUser { get; set; }
      public virtual string DataSegment { get; set; }  // Some group of data a user has access to, like US or China
      public virtual string RoleName { get; set; }
      public virtual string RoleDescription { get; set; }

      // extra field removed for breviety

      // overrides for equals and getHashCode
   }

我的数据库架构非常简单。

alt text http://lh6.ggpht.com/_MV6QGBD11JE/S3iX2qcP_jI/AAAAAAAAEE0/PGIO07BlCSo/s800/Untitled.gif.jpg

我已经像这样启动了IAutoMappingOverride类。但是，我不知道如何为角色设置hasMany。它一直在给我

NHibernate.FKUnmatchingColumnsException: 
   Foreign key (FK20531BE4163641BB:tblDomainUserRoles [DomainUser])) 
   must have same number of columns as the referenced primary key 
   (tblDomainUsers [Domain_Id, DomainUserLogin]).

如何设置该外键以同时使用这两个字段？

   public class DomainUserMap : IAutoMappingOverride<DomainUser>
   {
      public void Override(AutoMapping<DomainUser> mapping)
      {
         mapping.CompositeId()
            .KeyProperty(user => user.Domain_Id, "Domain_Id")
            .KeyProperty(user => user.DomainUserLogin, "DomainUserLogin");

         // I"ve tried this.
         // mapping.HasMany(x => x.Roles)
         //   .KeyColumns.Add("Domain_Id")
         //   .KeyColumns.Add("DomainUserLogin");

         //  also tried this where I define this FK in DB with both fields.
         // mapping.HasMany(x => x.Roles)
         //   .ForeignKeyConstraintName("FK_tblDomainUserRoles_tblDomainUsers")

      }
   }

    public class DomainUserRoleMap : IAutoMappingOverride<DomainUserRole>
       {
          public void Override(AutoMapping<DomainUserRole> mapping)
          {
             mapping.CompositeId()
                .KeyReference(role => role.DomainUser)
                .KeyProperty(role => role.DataSegment)
                .KeyProperty(role => role.RoleName);         
          }
       }

Answer 1

您可能想要使用复合键类。

使用密钥类here at SO的示例。您可能必须下拉并使用HBM文件，而不是使用Fluent NHibernate。

Answer 2

我做了最终手动编辑hbm文件。看起来最流行的Nhibernate构建解决了这个问题。这是我的hbm文件的样子。

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
  <class xmlns="urn:nhibernate-mapping-2.2" name="AAA.Core.Entities.DomainUser, AAA.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" table="`tblDomainUsers`">
    <composite-id mapped="false" unsaved-value="undefined">
      <key-property name="Domain_Id" type="System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
        <column name="Domain_Id" />
      </key-property>
      <key-property name="DomainUserLogin" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
        <column name="DomainUserLogin" />
      </key-property>
    </composite-id>
    ... properties hidden for breviety
    <bag inverse="true" cascade="all-delete-orphan" lazy="false" name="Roles">
      <key>
        <column name="Domain_Id" />
        <column name="DomainUserLogin" />
      </key>
      <one-to-many class="AAA.Core.Entities.DomainUserRole, AAA.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
    </bag>
  </class>
</hibernate-mapping>

这是角色的文件。

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" default-access="property" auto-import="true" default-cascade="none" default-lazy="true">
  <class xmlns="urn:nhibernate-mapping-2.2" name="AAA.Core.Entities.DomainUserRole, AAA.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" table="`tblDomainUserRoles`">
    <composite-id mapped="false" unsaved-value="undefined">
      <key-property name="DataSegment" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
        <column name="DataSegment" />
      </key-property>
      <key-property name="RoleName" type="System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
        <column name="RoleName" />
      </key-property>
      <key-many-to-one name="DomainUser" class="AAA.Core.Entities.DomainUser, AAA.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
        <column name="Domain_Id" />
        <column name="DomainUserLogin" />
      </key-many-to-one>
    </composite-id>
     ... properties hidden for breviety
  </class>
</hibernate-mapping>

如何覆盖复合Id的自动化，与流利的nhibernate的一对多关系？

2 个答案: