I have a table that have a Many to One relationship to a Many to Many relationship. I would like to know how to represent that with Hibernate annotations, couldn't manage to find anything that could help me.
Here are my classes :
CompanyEntity.java :
@Entity
@Table(name="TR_SOCIETES")
public class CompanyEntity {
@Id
@Column(name="Id")
private String _id;
@ManyToMany(fetch = FetchType.LAZY)
@JoinTable(
name="TR_SOCIETESCONTACTS",
joinColumns = {@JoinColumn(name="Societe")},
inverseJoinColumns = {@JoinColumn(name="Contact")}
)
private Collection<ContactEntity> _contacts;
}
ContactEntity.java :
@Entity
@Table(name="TR_CONTACTS")
public class ContactEntity {
@Id
@Column(name = "Id")
private String _id;
@ManyToMany(mappedBy = "_contacts")
private Collection<CompanyEntity> _companies;
}
Thoses tables are linked by the relation : TR_SOCIETESCONTACTS
And here is my problem. I have a table " Imputation
" that must link to one TR_SOCIETESCONTACTS
in order to reference a company and a contact but I can't manage to do it.
Do anyone have an idea?
Thank you :)
您可以将Imputation
关系与CompanyEntity
或ContactEntity
建立关系(如果这符合您的域模型)……或者-我认为这更现实-您可以创建一个新实体CompanyContacts
,该实体将映射到TR_SOCIETESCONTACTS
表,多对一从CompanyEntity
, ContactEntity
和Imputation
每个实体到此实体的关系..如果您需要向TR_SOCIETESCONTACTS
关系本身添加任何状态字段,这也将是唯一的解决方案
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