org.hibernate.hql.internal.ast.QuerySyntaxException：路徑預期加入

Question

我有問題，hql
我有3個表
1.用戶（USER_ID = PK，用戶名）
2.組（GROUP_ID = PK，組名）
3.用戶組（USER_ID = FK，GROUP_ID = FK）

<hibernate-mapping> 
<class name="com.model.authRole.UserGroups" table="user_groups" catalog="db_realm" optimistic-lock="version"> 
    <composite-id name="id" class="com.model.authRole.UserGroupsId"> 
     <key-property name="userId" type="int"> 
      <column name="user_id" /> 
     </key-property> 
     <key-property name="groupId" type="int"> 
      <column name="group_id" /> 
     </key-property> 
    </composite-id> 
    <many-to-one name="groups" class="com.model.authRole.Groups" update="false" insert="false" fetch="select"> 
     <column name="group_id" not-null="true" /> 
    </many-to-one> 
    <many-to-one name="users" class="com.model.authRole.Users" update="false" insert="false" fetch="select"> 
     <column name="user_id" not-null="true" /> 
    </many-to-one> 
    <property name="aktiv" type="boolean"> 
     <column name="aktiv" not-null="true" /> 
    </property> 
</class> 

我想告訴用戶名和group_name但錯誤從hql

from UserGroups ug 
inner join Users u on u.user = ug.user_id 
inner join Groups g on g.group = ug.group_id 

，並記錄錯誤

org.hibernate.hql.internal.ast.QuerySyntaxException：路徑預期 的加入！ [從com.model.authRole.UserGroups微克內加入 用戶U ON u.user = ug.user_id內上g.group加入組G = ug.group_id]

如何解決此問題？

Answer 1

我認爲類UserGroups包含User對象和對象從Group類

session.createQuery("from UserGroups ug where ug.User = :user and ug.Group =:group").setParameter("user", (Users)session.get(Users.class,user_id)).setParameter("group", (Groups)session.get(Groups.class,group_id));