Criteria API - 连接两个表会引发异常

Question

我有一个包含 AccountOwner 表和 Account 表的数据库。 Account 表有一个 PK“account_number”，AccountOwner 表具有与 FK 相同的属性。我正在尝试在此属性上加入两个表，这是我的代码：

      EntityManager em = emfactory.createEntityManager();          

      CriteriaBuilder cb = em.getCriteriaBuilder(); 
      CriteriaQuery<Account> cq = cb.createQuery(Account.class);
      Root<AccountOwner> aroot = cq.from(AccountOwner.class);

      Join<AccountOwner,Account> ajoin = aroot.join("account_number");

      cq.select(ajoin).where(cb.equal(aroot.get("ClientId"),k.getClientID()));

但是，这会引发以下异常：

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException:The attribute [account_number] is not present in the managed type 
[EntityTypeImpl@18830730:AccountOwner[ javaType: class banking.AccountOwner descriptor: RelationalDescriptor(banking.AccountOwner--> [DatabaseTable(acccount_owner)]), mappings: 3]].
at org.eclipse.persistence.internal.jpa.metamodel.ManagedTypeImpl.getAttribute(ManagedTypeImpl.java:148)

我知道两个表中的属性都调用了这个，这里是实体类的相关部分：

public class AccountOwner implements Serializable {
//...

@JoinColumn(name = "account_number", referencedColumnName = "account_number")
@ManyToOne(optional = false)
private Account accountNumber;
//...

}




public class Account implements Serializable {
//....

@Column(name = "account_number")
private Integer accountNumber;
@Basic(optional = false)

//....
}

我做错了什么？

Answer 1

正如评论所说，我必须使用accountNumber 而不是account_number。