用jpa创建外键 [英] Create foreign key with jpa

问题描述

因此，当我运行项目时，会创建User表和Doc表，但是在Doc表中没有看到User表的外键.

So when I run my project the User table and the Doc table are created, but I dont see the foreign key for User table in the Doc table.

如您所见，我同时具有ManyToOne和OneToMany批注，但尚未创建User的外键.

As you can see I have both ManyToOne and OneToMany annotations, and yet the foreign key for User isn't created.

我该如何解决?

推荐答案

您需要添加@JoinColumn(name ="ID Column Name")批注以及@ManyToOne或@OneToMany批注，如ZaoTaoBao所述.此批注确定将用作FK的列的名称.

You need to add @JoinColumn(name = "ID Column Name") annotation along with the @ManyToOne or @OneToMany annotation as ZaoTaoBao mentioned. This annotation determines the name of the column which is to be used as FK.

有关更多详细信息，请参考此链接: http://docs.oracle.com/javaee/6/api/javax/persistence/JoinColumn.html

Refer to this link for more details: http://docs.oracle.com/javaee/6/api/javax/persistence/JoinColumn.html

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