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最新文章列表
JoinColumn VS mappedBy
What is the difference between:
@Entity
public class Company {
@OneToMany(cascade = CascadeType.ALL , fetch = FetchType.LAZY)
@JoinColumn(name = "companyIdRef", referencedColu ...
@PrimaryKeyJoinColumn and mappedBy
1 ANNOTATIONS
1.1 @PrimaryKeyJoinColumn and mappedBy
1.1.1 Note
@PrimaryKeyJoinColumn is an annotation, while mappedBy is only an attribute of the @OneToOne, @OneToMany, @ManyToOne and @ManyToMany
1.1 ...
hibernate的注解属性mappedBy详解
mappedBy:
1>只有OneToOne,OneToMany,ManyToMany上才有mappedBy属性,ManyToOne不存在该属性;
2>mappedBy标签一定是定义在被拥有方的,他指向拥有方;
3>mappedBy的含义,应该理解为,拥有方能够自动维护跟被拥有方的关系,当然,如果从被拥有方,通过手工强行来维护拥有方的关系也是可以做到的;
4>mappedBy ...