JPA:@ManyToOne关系的默认列名映射
当我们有一个类时:
@Entity
Order实现Serializable {
@Id
private Integer id;
...
}
以及:
@Entity
OrderLine实现Serializable {
@Id
private Integer id;
@ManyToOne
Order order;
...
}
属性order将映射为哪个列名?
order_id, ORDER_ID还是Order_id?
(故意省略@JoinColumn(name='order_id'))