英文:
Spring jpa disable merge
问题
I want disable merge in jpa repository. It should only be possible to create new records and prohibit updating old ones. <br>
So, how to disable the update of records for the repository if I extend from JpaRepository?
英文:
i want disable merge in jpa repository. It should only be possible to create new records and prohibit updating old ones. <br>
So, how to disable the update of records for the repository if i extends from JpaRepository?
答案1
得分: 1
-
使您的实体成为不可变的可以阻止对托管实体的更改，因此在事务中不会传播任何更改。
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但是，它不会阻止Hibernate更新数据库记录，如果您传递了具有分配的ID并且它已经存在于数据库中的不可变记录。
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因此，我认为您可以查看
@PreUpdate实体监听器并抛出异常。因此，如果有人尝试更新，它将抛出异常，更新将不会发生。 -
但最好的方法是创建一个服务，该服务隐藏了存储库，并且
- 服务在save之前执行find以避免第二点
- 使实体不可变以确保第一点。
英文:
-
Making your entity immutable can stop changes happening to managed entities and as a result no changes will be propagated within the transaction.
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However it does not stop hibernate updating the database record, if you passed immutable record with id assigned and it already exists in db.
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So I think you can look into
@PreUpdateentity listener and throw exception. So if someone tries to update, it will throw exception and update will not happen. -
But the best way is to create service which hides the repository and
-
Service does a
findbeforesaveto avoid second point -
Make the entity immutable to make sure first point.
答案2
得分: 0
你需要的基本上是一个不可变实体，从你的实体中移除设置器，使用构建器来创建新的实体。
英文:
What you need is basically an immutable entity, remove setters from your entity and use builders to create new entities.
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