zoukankan      html  css  js  c++  java
  • jpa 报错: Unable to build Hibernate SessionFactory; nested exception is org.hibernate.loader.MultipleBagFetch

    model代码如下:

    @OneToMany(fetch=FetchType.EAGER, cascade = CascadeType.ALL)
        @Where(clause="isValid=1 and orderType=1")
        @JoinColumn(name = "orderUUID", referencedColumnName = "JobShippingOrderUUID",insertable = false, updatable = false)
        public List<BoJobgoods> getBoJobgoodsList() {
            return boJobgoodsList;
        }
    
        @OneToMany(fetch=FetchType.EAGER, cascade = CascadeType.ALL)
        @Where(clause="isValid=1 and orderType=1")
        @JoinColumn(name = "orderUUID", referencedColumnName = "JobShippingOrderUUID",insertable = false, updatable = false)
        public List<BoJobcontainer> getBoJobcontainerList() {
            return boJobcontainerList;
        }

    启动就报错 Unable to build Hibernate SessionFactory; nested exception is org.hibernate.loader.MultipleBagFetch。。。。。。。。。。

    原因是同一个model里不能有二个 FetchType.EAGER 

    于是把另一个改成:FetchType.LAZY 再次启动成功

    但是访问接口又报另一个错:

    Could not write JSON: failed to lazily initialize a collection of role: com.kintech.model.domain.bo.BoJobshippingorder.boJobgoodsList, could not initialize proxy - no Session; nested exception is com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: 

    于是再改把后码的list字段添加@Fetch(FetchMode.SUBSELECT)注解代码如下:

    @OneToMany(fetch=FetchType.EAGER)
        @Where(clause="isValid=1 and orderType=1")
        @JoinColumn(name = "orderUUID", referencedColumnName = "JobShippingOrderUUID",insertable = false, updatable = false)
        public List<BoJobgoods> getBoJobgoodsList() {
            return boJobgoodsList;
        }
    
        public void setBoJobgoodsList(List<BoJobgoods> boJobgoodsList) {
            this.boJobgoodsList = boJobgoodsList;
        }
    
        @OneToMany(fetch=FetchType.EAGER)
        @Fetch(FetchMode.SUBSELECT)
        @Where(clause="isValid=1 and orderType=1")
        @JoinColumn(name = "orderUUID", referencedColumnName = "JobShippingOrderUUID",insertable = false, updatable = false)
        public List<BoJobcontainer> getBoJobcontainerList() {
            return boJobcontainerList;
        }

     再运行,完全搞定



    欢迎加入JAVA技术交流QQ群:179945282

    欢迎加入ASP.NET(C#)交流QQ群:17534377


  • 相关阅读:
    HttpServletRequest request 获取form参数的两种方式
    mysql中计算两个日期的时间差函数TIMESTAMPDIFF用法
    Better exception message for missing @RequestBody method parameter
    下载Xcode历史版本方法
    CGLib与JDK的动态代理
    LeetCode: Longest Consecutive Sequence [128]
    POJ训练计划2777_Count Color(线段树/成段更新/区间染色)
    JBoss AS 7性能调优(三)
    java的Future使用方法
    Redis学习资源
  • 原文地址:https://www.cnblogs.com/q149072205/p/14819175.html
Copyright © 2011-2022 走看看