条件API - 连接两个表会抛出异常

Question

我有一个包含AccountOwner表和Account表的数据库。账户表具有PK“account_number”，并且AccountOwner表具有与FK相同的属性。我想加盟此属性的两个表，这里是我的代码：

 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，这将引发以下异常：

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) 

我知道一个事实，即所谓的正是这种属性在这两个表中，以下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) 

//.... 
} 

我在做什么错？

Answer 1

我不得不使用accountNumber而不是account_number，如评论所述。