自动为@Embeddable 类的列名添加前缀 [英] Automatically Add a Prefix to Column Names for @Embeddable Classes

问题描述

我正在开发一个项目，在该项目中我通过添加 Hibernate 注释来保留一些 POJO.我遇到的一个问题是这样的代码失败了，因为 Hibernate 尝试将 Time_T 中的子字段映射到同一列(即 startTime.sec 和 stopTime.sec 都尝试映射到列 sec，导致错误).

@Entity公共类 ExampleClass{@ID长事件ID；Time_T 开始时间；Time_T 停止时间；}@Embeddable公开课 Time_T{整数秒；内秒；}

由于在整个系统中会出现很多这样的情况，如果有一个选项可以自动将前缀附加到列名(例如，使列成为 startTime_sec、startTime_nsec、stopTime_sec、stopTime_nsec)，而不必在每个字段的基础上应用覆盖.Hibernate 是否具有此功能，或者是否有其他合理的解决方法?

解决方案

尝试将属性hibernate.ejb.naming_strategy设置为org.hibernate.cfg.DefaultComponentSafeNamingStrategy>

I am developing a project in which I am persisting some POJOs by adding Hibernate annotations. One problem I am running into is that code like this fails, as Hibernate tries to map the sub-fields within the Time_T onto the same column (i.e. startTime.sec and stopTime.sec both try to map to the colum sec, causing an error).

@Entity
public class ExampleClass
{
  @Id
  long eventId;

  Time_T startTime;
  Time_T stopTime;
}

@Embeddable
public class Time_T
{
  int sec;
  int nsec;
}

As there will be many occurrences like this throughout the system, it would be nice if there was an option to automatically append a prefix to the column name (e.g. make the columns be startTime_sec, startTime_nsec, stopTime_sec, stopTime_nsec), without having to apply overrides on a per-field basis. Does Hibernate have this capability, or is there any other reasonable work-around?

解决方案

Try setting the property hibernate.ejb.naming_strategy to org.hibernate.cfg.DefaultComponentSafeNamingStrategy

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