我不断收到以下错误:“无法找到命名参数 [articleCommentId]”，但这对我来说没有意义，因为对我来说命名参数非常合适。 p>
public ArticleCommentForDisplay getCommentByArticleCommentId(BigInteger articleCommentId) {
String queryString = "select c.article_comment_id, "
+ " c.article_id, "
+ " c.parent_comment_id, "
+ " p.nickname, "
+ " c.title, "
+ " c.comment, "
+ " c.person_id, "
+ " c.confirmed_user, "
+ " c.comment_depth, "
+ " c.moderation_rank, "
+ " c.moderation_reason, "
+ " c.hide, "
+ " c.hide_reason, "
+ " c.session_id, "
+ " c.confirmation_uuid, "
+ " c.created_timestamp, "
+ " c.created_by_id, "
+ " c.updated_timestamp, "
+ " c.updated_by_id, "
+ " c.update_action, "
+ " null as comment_path "
+ "from article_comment c "
+ " join person p "
+ " on p.person_id = c.person_id "
+ "where c.article_comment_id = :articleCommentId; ";
Query query = em.createNativeQuery(queryString, "ArticleCommentMap");
query.setParameter("articleCommentId", articleCommentId);
List <ArticleCommentForDisplay> articleComments = new ArrayList<>();
articleComments = query.getResultList();
ArticleCommentForDisplay theComment = articleComments.get(0);
return (theComment);
}
这是包含相关错误的堆栈跟踪的摘录:
Caused by: java.lang.IllegalArgumentException: org.hibernate.QueryParameterException: could not locate named parameter [articleCommentId]
at org.hibernate.ejb.QueryImpl.setParameter(QueryImpl.java:379)
at org.hibernate.ejb.QueryImpl.setParameter(QueryImpl.java:72)
at com.extremelatitudesoftware.content.ArticleCommentFacade.getCommentByArticleCommentId(ArticleCommentFacade.java:293)
最佳答案
我敢打赌这是由于您的查询字符串中有额外的 ;。
SQL/HQL不需要分号结束
关于java - JPA 找不到命名参数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13391384/