创建一个新的Hibernate表 [英] Creating a new Hibernate table

问题描述

因此，我对Hibernate仍然很陌生，而且我正在开发一个大型的ish应用程序，该应用程序已经有一个带有多个Hibernate表的数据库。我正在研究一个新功能，其中包含一个新的 @Entity 类，并且我需要将这些对象存储在一个新表中。这个类声明如下：

pre code $ @Entity
@Table（name =DATA_REQUEST）
公共类DataRequest {

//一些字段，没什么特别的意思

}

DATA_REQUEST 表不存在，我也没有任何数据可以存储。我启动了应用程序，希望它可以创建表或崩溃，因为它还不存在。这些都没有发生。

所以：我是否需要手动创建表格（轻松完成）？或者我需要去其他地方告诉Hibernate我需要这张表吗？我已经看到 hibernate.cfg.xml 文件，它看起来是一个很好的开始。

解决方案

您需要为hibernate.hbm2ddl.auto属性指定create。请阅读此处。这不建议在生产中使用，但仅用于测试目的。

So I'm still pretty new to Hibernate, and I'm working on a large-ish application that already has a database with several Hibernate tables. I'm working on a new feature, which includes a new @Entity class, and I need these objects to be stored in a new table. The class is declared like this:

@Entity
@Table(name="DATA_REQUEST")
public class DataRequest {

//Some fields, nothing fancy

}

The DATA_REQUEST table does not exist, nor do I have any data to store in it yet. I started the application up, expecting that it would either create the table or crash because it doesn't exist yet. Neither of these actually happened.

So: do I need to create the table manually (easily done)? Or do I need to go somewhere else to tell Hibernate that I need this table? I've seen the hibernate.cfg.xml file, which looks like a good place to start.

解决方案

You need to specify "create" for the "hibernate.hbm2ddl.auto" property. Read more details here. This is not recommended in production but only for testing purposes.

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