hibernate.enable_lazy_load_no_trans无法正常工作 [英] hibernate.enable_lazy_load_no_trans is not working

问题描述

我正在使用JPA2.1和hibernate 4.3.8，并且已将presistence.xml配置为允许延迟加载

I'm using JPA2.1 and hibernate 4.3.8 and i have configured the presistence.xml to allow lazy loading

我已添加

<property name="hibernate.enable_lazy_load_no_trans" value="true" />

进入属性部分

但是我仍然收到LazyInitializtionException，这是什么问题?

but i'm still getting LazyInitializtionException, what is the problem ?

推荐答案

hibernate.enable_lazy_load_no_trans 是反模式，并且您永远不要使用它，因为从初始持久性上下文之外获取的每个惰性关联都需要数据库连接，这将对基础事务日志和JDBC连接池造成压力.

The hibernate.enable_lazy_load_no_trans is an anti-pattern and you should never use it because a database connection is needed for every lazy association that is fetched outside of the initial Persistence Context, and that's going to put pressure on the underlying transaction log and the JDBC connection pool.

更多， hibernate.enable_lazy_load_no_trans 容易出现N + 1个查询问题.

More, the hibernate.enable_lazy_load_no_trans is prone to N+1 query issues.

有时候，您甚至不需要实体，而DTO投影甚至更好.

Sometimes, you don't even need entities, and a DTO projection is even better.

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