Question

我想知道是否可以有条件地忽略查询的一部分（部分不完整）。我在JPA中有查询

    @Query("SELECT DISTINCT new it.akademija.wizards.models.document.DocumentGetReviewCommand(" +
        "d.author.firstname, d.author.lastname, d.id, d.title, d.description, d.documentType.title, d.submissionDate)" +
        " FROM Document d" +
        " JOIN d.documentType dt" +
        " JOIN dt.reviewUserGroups rug" +
        " JOIN rug.users u WHERE u.username = :username" +
        " AND d.documentState = it.akademija.wizards.enums.DocumentState.SUBMITTED" +
        " AND u <> d.author" +
        " **AND (lower(CONCAT(d.author.firstname, ' ', d.author.lastname)) like %:searchFor% " +
        " OR lower(d.title) like %:searchFor%" +
        " OR lower(d.description) like %:searchFor%" +
        " OR lower(d.id) like %:searchFor%" +
        " OR lower(dt.title) like %:searchFor%)")
   Page<DocumentGetReviewCommand> getDocumentsForReview(@Param(value = "username") String username,
                                                     @Param(value = "searchFor") String searchFor,
                                                     Pageable pageable);

如果searchFor参数为null或空白（“”），如何忽略下面的部分

AND (lower(CONCAT(d.author.firstname, ' ', d.author.lastname)) like %:searchFor% " +
        " OR lower(d.title) like %:searchFor%" +
        " OR lower(d.description) like %:searchFor%" +
        " OR lower(d.id) like %:searchFor%" +
        " OR lower(dt.title) like %:searchFor%)

Answer 1

您可以尝试添加逻辑，以便在搜索条件为空或空时可以跳过这些条件：

AND
    (COALESCE(:searchFor, '') = '' OR
    (LOWER(CONCAT(d.author.firstname, ' ', d.author.lastname)) LIKE %:searchFor% OR
     LOWER(d.title) LIKE %:searchFor%" OR
     LOWER(d.description) LIKE %:searchFor% OR
     LOWER(d.id) LIKE %:searchFor% OR
     LOWER(dt.title) like %:searchFor%))

如何在JPA查询中有条件地忽略WHERE的SQL查询部分

1 个答案: