商品评论(comment),对应评论者(shopper)和商品(commodity)
//多条评论对应一个shopper
@ManyToOne(cascade=CascadeType.REMOVE,optional=true)
@JoinColumn(name="ID")
private Shopper shopper;
//多条评论对应一个商品
@ManyToOne(cascade=CascadeType.REMOVE,optional=true)
@JoinColumn(name="ID")
private Commodity commodity;
评论:
@OneToMany(cascade={CascadeType.REMOVE},mappedBy="commodity")
private List<Comment> comment;
购物者:
@OneToMany(cascade={CascadeType.REMOVE},mappedBy="shopper")
private List<Comment> comment;
但是运行就报错:
Repeated column in mapping for entity: com.wtu.Entity.Shopper.Comment column: ID (should be mapped with insert="false" update="false")
------解决思路----------------------
楼主,把你的Id改一下,你的 两个实体类注解的@JoinColumn(name="ID")的name是一样的,
------解决思路----------------------
@ManyToOne(targetEntity = CmcsUser.class, fetch = FetchType.EAGER)
@JoinColumn(name = "USER_ID")
private CmcsUser user;
@ManyToOne(targetEntity = CmcsGroup.class, fetch = FetchType.EAGER)
@JoinColumn(name = "GROUP_ID")
private CmcsGroup group;
给你参考下
------解决思路----------------------
joincolum 中 name 对应的是 你想要映射的关联依据 字段名称
------解决思路----------------------
多条评论对应一个shopper
@JoinColumn(name="ID")
private Shopper shopper;
多条评论对应一个商品
@JoinColumn(name="ID")
private Commodity commodity;
同一张表里使用了相同名称两个外键 所以报错