HibernateException:找到相同集合的两个表示 [英] HibernateException: Found two representations of same collection
问题描述
如果我保存一个包含以下列表的对象
If I save an object containing the following list
@OneToMany(cascade=CascadeType.ALL, mappedBy="taskList")
@OrderColumn(name="position", nullable=false)
public List<Task> tasks = new ArrayList<Task>();
我得到了异常
org.hibernate.HibernateException: Found two representations of same collection
Play 中的代码!控制器看起来像这样:
The code in the Play! controller looks like this:
TaskList taskList = taskList.findById(taskListId);
taskList.add(position, task);
taskList.save();
如果我在这个块之前插入 taskList.refresh()
它可以工作,但是位置信息丢失了(这会导致其他错误).
If I insert taskList.refresh()
before this block it works, but the position information is lost (which leads to other errors).
这是 Hibernate 错误还是我的代码有问题?
Is this a Hibernate bug or is something wrong with my code?
推荐答案
问题是,Hibernate 不支持 @OneToMany(mappedBy=...)
和 @ 的组合订单列
.如果没有 mappedBy
,Hibernate 使用连接表,一切都按预期工作.请参阅说明.
The problem was, that Hibernate does not support the combination of @OneToMany(mappedBy=...)
and @OrderColumn
. Without mappedBy
Hibernate uses a join table and everything works as expected. See explanation.
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