Criteria API-連接兩個表會引發異常

Question

我有一個數據庫，其中包含AccountOwner表和Account表。 Account表具有PK“ account_number”，而AccountOwner表具有與FK相同的屬性。 我試圖將兩個表聯接到此屬性上，這是我的代碼：

      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，這引發以下異常：

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)

我知道一個事實，即兩個表中都精確地調用了此屬性，這是實體類的相關部分：

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)

//....
}

我究竟做錯了什么？

Answer 1

正如評論所說，我不得不使用accountNumber而不是account_number 。