Hibernate中DetachedCriteria使用注意点-1

Hibernate中DetachedCriteria使用注意点-1

代码一：

    DetachedCriteria dc  =  DetachedCriteria.forClass(classT,  " p " );
    dc.add(Restrictions.eq( " purePeptide " , purePeptide));
    dc.add(Restrictions.eq( " project.id " , projectId));
    dc.addOrder(Order.asc( " peptide " ));

代码二：

    DetachedCriteria dc  =  DetachedCriteria.forClass(classT,  " p " );
    dc.add(Restrictions.eq( " p.purePeptide " , purePeptide));
    dc.add(Restrictions.eq( " project.id " , projectId));
    dc.addOrder(Order.asc( " peptide " ));

两段代码唯一的区别就是第二句是使用"purePeptide"还是"p.purePeptide"。
代码一产生的sql语句：
select this_.purePeptide as y1_, this_.peptide as y2_ from SequestPeptide this_ where y1_ = 'NASILLEELDLEK' and this_.project_id=1 order by y2_ asc
运行会报Unknown column name:Y1_

代码二产生的正确的sql语句：
select this_.purePeptide as y1_, this_.peptide as y2_ from SequestPeptide this_ where this_.purePeptide='NASILLEELDLEK' and this_.project_id=1 order by y2_ asc