我在将实体插入数据库时遇到问题。我正在使用 Hibernate JPA。
这是我的数据库结构：
Table : User {CGU_USER_ID as PK}
Table : Industries {CGI_INDUSTRY_ID (PK),CGI_INDUSTRY_NAME}
Table : USER_INDUSTRY_MAP {CUIM_USER_ID (FK),CUIM_INDUSTRY_ID (FK)}
这是我的映射：
@JoinTable(name = "USER_INDUSTRY_MAP", joinColumns = @JoinColumn(name = "CUIM_USER_ID", referencedColumnName = "CGU_USER_ID"), inverseJoinColumns = @JoinColumn(name = "CUIM_INDUSTRY_ID"))
@OneToMany(cascade = { CascadeType.MERGE, CascadeType.REMOVE }, fetch = FetchType.EAGER)
private List<Industry> industrySet;
我收到的异常说：
org.springframework.dao.DataIntegrityViolationException: could not insert collection: [com.keff.gg.domain.User.industrySet#1242]; SQL [insert into CG_USER_INDUSTRY_MAP (CUIM_USER_ID, CUIM_INDUSTRY_ID) values (?, ?)]; constraint [CUSTOMERGATEWAY.FK_CUIM_USER_ID]; nested exception is org.hibernate.exception.ConstraintViolationException: could not insert collection: [com.keff.gg.domain.User.industrySet#1242]
Caused by: java.sql.SQLException: ORA-02291: integrity constraint (CUSTOMERPROJECT.FK_CUIM_USER_ID) violated - parent key not found
这是我的插入代码：
User user = new User();
query = session.createQuery("from Industry industry where industry.industryName=:industryName");
query.setParameter("industryName", "validIndstry");
results = (List<?>) query.list();
if(results != null && results.size()>0){
industryList = (List<Industry>)results;
}
user.setIndustrySet(industryList); // If this is set to null then insert into User table is successfull
Long id = (Long) hibernateTemplate.save(user);
有人可以看看我的映射并告诉我我做错了什么吗？
请帮帮我。我对冬眠非常陌生。如果需要更多信息来追踪问题，请告诉我。
更新 - - - - - - - - - - - - - - - - - - - - - - - - - ------------------------------------------------
我尝试过建立多对多和双向的关系
//User Class
@JoinTable(name = "CG_USER_INDUSTRY_MAP", joinColumns = @JoinColumn(name = "CUIM_USER_ID", referencedColumnName = "CGU_USER_ID"), inverseJoinColumns = @JoinColumn(name = "CUIM_INDUSTRY_ID"))
@ManyToMany(cascade = { CascadeType.MERGE, CascadeType.REMOVE }, fetch = FetchType.EAGER)
private List<Industry> industrySet;
//Industry Class
@ManyToMany(fetch = FetchType.LAZY, mappedBy = "industrySet")
private List<User> userSet;
但仍然遇到同样的问题。
