java – org.hibernate.hql.ast.QuerySyntaxException：TABLE NAME未映射

我有两个模型,Item和ShopSection.他们有多对多的关系.

@Entity(name = "item")
public class Item extends Model
{
    @ManyToMany(cascade = CascadeType.PERSIST)
    public Set<ShopSection> sections;
}

@Entity(name = "shop_section")
public class ShopSection extends Model
{
    public List<Item> findActiveItems(int page,int length)
    {
        return Item.find("select distinct i from Item i join i.sections as s where s.id = ?",id).fetch(page,length);
    }
}

findActiveItems是在一个部分中查找项目,但是我得到这个错误：

org.hibernate.hql.ast.QuerySyntaxException: Item is not mapped [select distinct i from Item i join i.sections as s where s.id = ?]
        at org.hibernate.hql.ast.util.SessionFactoryHelper.requireClasspersister(SessionFactoryHelper.java:180)
        at org.hibernate.hql.ast.tree.fromElementFactory.addfromElement(fromElementFactory.java:111)
        at org.hibernate.hql.ast.tree.FromClause.addfromElement(FromClause.java:93)
        at org.hibernate.hql.ast.HqlsqlWalker.createfromElement(HqlsqlWalker.java:322)
        at org.hibernate.hql.antlr.HqlsqlbaseWalker.fromElement(HqlsqlbaseWalker.java:3441)
        at org.hibernate.hql.antlr.HqlsqlbaseWalker.fromElementList(HqlsqlbaseWalker.java:3325)
        at org.hibernate.hql.antlr.HqlsqlbaseWalker.fromClause(HqlsqlbaseWalker.java:733)
        at org.hibernate.hql.antlr.HqlsqlbaseWalker.query(HqlsqlbaseWalker.java:584)
        at org.hibernate.hql.antlr.HqlsqlbaseWalker.selectStatement(HqlsqlbaseWalker.java:301)
        at org.hibernate.hql.antlr.HqlsqlbaseWalker.statement(HqlsqlbaseWalker.java:244)
        at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254)
        at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)
        at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
        at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
        at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
        at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:124)
        at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
        at org.hibernate.impl.AbstractSessionImpl.createquery(AbstractSessionImpl.java:135)
        at org.hibernate.impl.SessionImpl.createquery(SessionImpl.java:1770)
        at org.hibernate.ejb.AbstractEntityManagerImpl.createquery(AbstractEntityManagerImpl.java:272)
        ... 8 more

我究竟做错了什么？

解决方法

您需要添加如下的@Table注释：

@Entity
@Table(name = "item")
public class Item extends Model
{
    @ManyToMany(cascade = CascadeType.PERSIST)
    public Set<ShopSection> sections;
}

@Entity
@Table(name = "shop_section")
public class ShopSection extends Model
{
    public List<Item> findActiveItems(int page,length);
    }
}