deleted entity passed to persist: [dcms.ebridge.market.entity.Reward#]

今天项目中的错误：

deleted entity passed to persist: [dcms.ebridge.market.entity.Reward#<null>]

删除RetaReward 对应的所有的Reward

删除前先用RetailReward 获得所有的Reward 然后进行批量的删除

错误代码如下

    @Override
    public void delAccomplishReward(LoginEmployee user, long retaId)
            throws GenericBusinessException {
        RetaReward retaReward = findByPK(RetaReward.class, retaId);
        List<Reward> rewards = retaReward.getRewards();
        if(null == rewards || rewards.size() == 0){
            return ;
        }
        super.batchDelete(rewards);
    }

当删除的时候产生了上述的错误，应为删除rewards的时候的 retaReward还关联着相应的对象，而被删除后，还是有对象保留着对这些对象的应用，所以出错。

    @Override
    public void delAccomplishReward(LoginEmployee user, long retaId)
            throws GenericBusinessException {
        RetaReward retaReward = findByPK(RetaReward.class, retaId);
        List<Reward> rewards = retaReward.getRewards();
        retaReward.setRewards(null);
        if(null == rewards || rewards.size() == 0){
            return ;
        }
        super.batchDelete(rewards);
    }

修正后结果如上

这一块的关系到JPA对象状态的变化，关于各个状态的关系，已经记不清楚了，哪天有时间了再整理一下，完善一下这篇blog。

Caused by: org.hibernate.hql.ast.QuerySyntaxException: unexpected token: on near line 1, column 52