使用save()播放框架JPA问题 [英] Play framework JPA problem with save()

问题描述

我试图在数据库中保存一个简单的对象，但这给我带来了麻烦.

I'm trying to save a simple object in the database, but it's giving me problems.

这是我的对象类:

@Entity
@Table(name="lines")
public class Line extends GenericModel{

    @Id
    @Column(name="line_id")
    private int id;

    @Column(name="line_text")
    private String text;

    @Column(name="line_postid")
    private int postid;

    @Column(name="line_position")
    private int position;
}

这就是我的控制器中的内容:

And this is what I have in my controller:

Line l = new Line();
l.setPosition(0);
l.setPostid(4);
l.setText("geen");
l.save();

我正在为其他模型做完全相同的事情，但是我没有任何问题，只有这一件事给我带来了问题.当我刷新浏览器时，我得到: PersistenceException occured : org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update

I'm doing the exact same thing for other Models, and I'm having no problems, only this one is giving me problems. When I refresh the browser I get: PersistenceException occured : org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update

我还添加了jpa.debugSQL=true到我的配置中，并且在控制台中我得到了:

I also added jpa.debugSQL=true to my configuration, and in my console I'm getting:

Caused by: java.sql.BatchUpdateException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'lines (line_position, line_postid, line_text, line_id) values (0, 4, 'geen', 0)' at line 1

浏览器也显示以下内容:This exception has been logged with id 66k3glbb6，但我不知道在哪里可以查看我的日志，所以如果有人也可以告诉我呢?

And the browser is also showing this: This exception has been logged with id 66k3glbb6 but I have no idea where I can view my logs, so if someone could tell me that too?

推荐答案

lines是MySQL中的保留字，您需要按以下说明对其进行转义:

lines is a reserved word in MySQL, you need to escape it as follows:

@Table(name="`lines`") // Hibernate way

或

@Table(name="\"lines\"") // JPA standard way

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