JPA：對查詢鍵anyOf（）無效使用

我在Participant和抽象實體之間有OneToOne關係。我想查詢具有摘要的參與者。所以，我創建了以下查詢：JPA：對查詢鍵anyOf（）無效使用

@NamedQuery(name = Participant.FIND_ABSTRACT, query = "SELECT p FROM Participant p WHERE p.abstract_ IS NOT EMPTY ORDER BY p.email"), 
.... 
.... 
@OneToOne 
@JoinColumn 
private Abstract abstract_;

從Abstract.java：

@OneToOne(mappedBy="abstract_") 
private Participant participant;

當我嘗試使用它：

public List<Participant> getUploadedAbstract() { 
    TypedQuery<Participant> query = em.createNamedQuery(Participant.FIND_ABSTRACT, Participant.class); 
    return query.getResultList(); 
}

我獲得：

Caused by: Exception [EclipseLink-6071] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.QueryException 
Exception Description: Invalid use of anyOf() for a query key [org.eclipse.persistence.mappings.OneToOneMapping[abstract_]] not representing a to-many relationship in an expression. Use get() rather than anyOf(). 
at org.eclipse.persistence.exceptions.QueryException.invalidUseOfAnyOfInExpression(QueryException.java:738) 
at org.eclipse.persistence.internal.expressions.QueryKeyExpression.validateNode(QueryKeyExpression.java:894) 
at org.eclipse.persistence.expressions.Expression.normalize(Expression.java:2985) 
at org.eclipse.persistence.internal.expressions.DataExpression.normalize(DataExpression.java:342) 
at org.eclipse.persistence.internal.expressions.QueryKeyExpression.normalize(QueryKeyExpression.java:612) 
at org.eclipse.persistence.internal.expressions.RelationExpression.normalize(RelationExpression.java:605) 
at org.eclipse.persistence.internal.expressions.SQLSelectStatement.normalize(SQLSelectStatement.java:1300) 
at org.eclipse.persistence.internal.expressions.SubSelectExpression.normalizeSubSelect(SubSelectExpression.java:197) 
at org.eclipse.persistence.internal.expressions.ExpressionNormalizer.normalizeSubSelects(ExpressionNormalizer.java:93)

... ...

我哪裏錯了？

來源

2013-12-23 Enrico Morelli

您需要編輯命名查詢。應該

@NamedQuery(name = Participant.FIND_ABSTRACT, query = "SELECT p FROM Participant p WHERE p.abstract_ IS NOT NULL ORDER BY p.email")

不爲空，用於收藏。

來源

2013-12-23 16:17:44 dhamibirendra

IS [NOT] EMPTY用於選擇具有關聯實體的[非]空集合的實體，即在OneToMany或ManyToMany關聯上。你可能想

where p.abstract_ IS NOT NULL

來源

2013-12-23 16:16:59

你，你已經準備好了。謝謝大家。 –

JPA：對查詢鍵anyOf（）無效使用

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