我试图编写一个HQL查询来获取属于特定组织的用户列表,或者来自特许经营者列表中的任何特许经营者,但是hibernate无法解析它。我无法弄清楚原因。这是HQL:
from User u where
(u.parentOrganisation = :topLevelOrganisation or u.parentOrganisation in :franchisees)
and u.parentOrganisation.deleted = false
and u.active = true
这是hibernate吐出的错误:
unexpected AST node: {vector} [from com.myapp.User u where (u.parentOrganisation = :topLevelOrganisation or u.parentOrganisation in :franchisees0_, :franchisees
1_, :franchisees2_) and u.parentOrganisation.deleted = false and u.active = true]. Stacktrace follows:
Message: unexpected AST node: {vector} [from com.myapp.User u where (u.parentOrganisation = :topLevelOrganisation or u.parentOrganisation in :franchisees0_, :fr
anchisees1_, :franchisees2_) and u.parentOrganisation.deleted = false and u.active = true]
如果我取出or u.parentOrganisation in :franchisees
位,那么我的查询如下所示:
from User u where
(u.parentOrganisation = :topLevelOrganisation)
and u.parentOrganisation.deleted = false
and u.active = true
然后它工作正常。我的语法有什么问题?为什么hibernate会抱怨这个额外的子句?
答案 0 :(得分:27)
哦,事实证明我需要将:franchisees
括在括号中:
from User u where
(u.parentOrganisation = :topLevelOrganisation or u.parentOrganisation in (:franchisees))
and u.parentOrganisation.deleted = false
and u.active = true
答案 1 :(得分:2)
发生这种情况的原因是,当将数组中的数据放在列表中而没有括号时,用于从列表中搜索数据库的查询语法将是错误的。
示例:
List<Integer> userIdList = [0, 1, 2, 3]
不带括号的查询:from User u where u.id in :list
from User u where u.id in 0, 1, 2, 3
-错误的语法时,看起来像这样。
带括号的查询:from User u where u.id in (:list)
from User u where u.id in (0, 1, 2, 3)
-正确的语法时,看起来像这样。
答案 2 :(得分:1)
我们可以将HQL中的条件“OR”拆分为2个语句。
工作正常。
from User u where
(u.parentOrganisation = :topLevelOrganisation and u.parentOrganisation.deleted = false
and u.active = true )
or (u.parentOrganisation in (:franchisees) and u.parentOrganisation.deleted = false
and u.active = true)