请教!springboot @query自定义查询动态条件?
我有一个name条件 name不为空时执行 @Query("select * from a where 1=1 and name=?1",nativeQuery=true) 空时只执行select * from a where 1=1
怎么做，试了很多种方法都不行
这个spring boot和sping data jpa 有啥关系额，我用的jpa，看你这风格跟我的一样额
用@query是不好实现的，而且你这写的不通用，用jap的getBaseDao().findAll(getSpecification(spec));这个方法，拼接条件可以实现
这个sql比较复杂关联了5张表还有子查询，用jpa的方式实现不了，用自定义的好写一些
jpa的findall的getSpecification方法用public Predicate toPredicate(Root
CriteriaQuery query, CriteriaBuilder cb)拼接条件，就可以用代码控制了
我找到方法了，谢谢
找到什么方法呢？我正好也碰到这个问题
@Query(value = "select bill.id_ as id, bill.created_date as date, bill.no, lawyer_case .case_no as caseNo, " +
"lawyer_case .case_name as caseName, customer.no as customerNo, customer.cn_name as customerName, " +
"bill.total_expense_after_tax, bill.collected_money, bill.book_ticket_amount, bill.version " +
"e1.name as creator, bill.status" +
"from bill " +
"left join lawyer_case on lawyer_case .case_no=bill.case_no " +
"left join customer on customer.no=bill.customer_no " +
"left join employee e1 on e1.id_=bill.creator " +
"where IF (?1!='', customer_no=?1, 1=1) " +
"and IF (?2!='', case_no=?2, 1=1) " +
"and IF (?3!='', status=?3, 1=1) " +
"and IF (?4!='', creator'%',?4,'%')), 1=1) " +
"and create_by=?5 " +
"ORDER BY ?#{#pageable} ",
countQuery = "select count(*) " +
"from bill " +
"left join lawyer_case on lawyer_case .case_no=bill.case_no " +
"left join customer on customer.no=bill.customer_no " +
"left join employee e1 on e1.id_=bill.creator " +
"where IF (?1!='', customer_no=?1, 1=1) " +
"and IF (?2!='', case_no=?2, 1=1) " +
"and IF (?3!='', status=?3, 1=1) " +
"and IF (?4!='', creator'%',?4,'%')), 1=1) " +
"and create_by=?5 "+
"ORDER BY ?#{#pageable} ",
nativeQuery = true)
Page
String createBy, Pageable pageable);
试一下这样写
您好,你的sql语句可以这样写:
@Query（value=“ select * from a where name =？1 or -1=?1”，nativeQuery = true）
这样写就行了,让前端查询的时候,如果按照name查询,就传具体name的值,如果查询全部,就给你传 '-1' 即可! 我们的项目中资源下载一直就是这样 写的. 你的sql语句肯定是不行的,数据库有个最左匹配原则,所以按照你的sql执行逻辑来看永远查的都是全部数据.