条件抛出 org.hibernate.QueryException：无法解析属性但 HQL 有效

Question

我正在尝试使用条件检索 CompanyOnCampus 实体。它有一个组件 class 公司。映射是这样的：

<class name="entities.pp.Company" table="ie_company_info">
    <id column="company_id" name="id"/>
    <property column="company_name" name="name" type="string"/>
    <property column="company_short_name" name="shortName" type="string"/>
    <property column="company_description" name="description"    type="string"/>
</class>

<class name="entities.pp.CompanyOnCampus" table="c2ie_companies">
    <id column="c2ie_companie_id" name="id"/>
    <many-to-one column="c2ie_company_id" name="company"/>
    <many-to-one column="c2ie_institute_id" name="institute"/>
</class>

标准：

Criteria criteria = session.createCriteria(CompanyOnCampus.class);
criteria.add(Restrictions.eq("institute.instituteId", pUser.getInstituteInfo().getInstituteId()))
.add(Property.forName("company").getProperty("name").like(pSearchString+"%"));

或

Criteria criteria = session.createCriteria(CompanyOnCampus.class);
criteria.add(Restrictions.eq("institute.instituteId", pUser.getInstituteInfo().getInstituteId()))
.add(Restrictions.ilike("company.name",pSearchString+"%"));

这里的结果是我得到了异常

org.hibernate.QueryException: could not resolve property company.name for class entities.pp.CompanyOnCampus ...

现在我尝试用 HQL 做同样的事情：

String q = "FROM CompanyOnCampus company WHERE company.company.name LIKE :name AND company.institute.instituteId = :instiId";
Query hql = session.createQuery(q);
hql.setParameter("name", pSearchString+"%");
hql.setParameter("instiId", pUser.getInstituteInfo().getInstituteId());
List<CompanyOnCampus> companies = hql.list();

结果出来了

Answer 1

创建 company 的别名将解决此问题。

Criteria criteria = session.createCriteria(CompanyOnCampus.class);
criteria.createAlias("company","company");

Answer 2

使用公司的 createAlias 作为 criteria.createAlias("company","company") 即

Criteria criteria = session.createCriteria(CompanyOnCampus.class);
criteria.add(Restrictions.eq("institute.instituteId", pUser.getInstituteInfo().getInstituteId()))
.createAlias("company", "company")
.add(Restrictions.ilike("company.name", pSearchString+"%"));

成功了。这表明对于驻留在引用的 table 中的 fields/columns，标准 API 需要提供明确的别名。

谢谢！

条件抛出 org.hibernate.QueryException：无法解析属性但 HQL 有效

Criteria throws org.hibernate.QueryException: could not resolve property but HQL works

java

hibernate

hql

hibernate-criteria

条件抛出 org.hibernate.QueryException：无法解析 属性 但 HQL 有效

Criteria throws org.hibernate.QueryException: could not resolve property but HQL works

java

hibernate

hql

hibernate-criteria

条件抛出 org.hibernate.QueryException：无法解析属性但 HQL 有效