我有5张桌子:
User (Mark)
Enterprise (Google)
EnterpriseUser (Mark, Google)
EnterpriseRight (LOGIN)
EnterpriseUserRight (Mark-Google, LOGIN)
我想使用GORM查询Mark(当前用户)拥有LOGIN权限的所有企业的数据库。然后,我希望能够对结果进行排序和分页。
我之前通过构建List来做到这一点,但我会引用返回ResultSet(仍然可以对其进行排序/分页/查询)
我的User.class(域对象)尝试(生成列表< Enterprise>)
public List<Enterprise>getEnterprises() {
def list = new ArrayList<Enterprise>()
for (EnterpriseUser eu: this.enterpriseUsers) {
if (this.hasEnterpriseRights(eu.enterprise, [EnterpriseRight.LOGIN])) {
list.add(eu.enterprise)
}
}
return list
}
(但是我无法对这些结果进行排序和分页,因为它们现在是一个列表。如果此查询可以返回结果集,那就太好了)
英文:
查找与此Enterprise
相关联的所有User
,此用户的EnterpriseRight
字符串名称为“LOGIN”。按字母顺序列出,从Offset 10给我10个结果。
我会在这里发布我的代码,但我不知道从哪里开始。
域对象是:
class User {
static hasMany = [userSystemRights: UserSystemRight, enterpriseUsers: EnterpriseUser]
String email;
String passwordHash;
}
class Enterprise {
static hasMany = [enterpriseUsers: EnterpriseUser, measurements: Measurement]
String name = ""
String tradingName = ""
}
class EnterpriseUser {
static belongsTo = [enterprise: Enterprise, user: User]
static hasMany = [enterpriseUserRights: EnterpriseUserRight]
Enterprise enterprise
User user
String interest
}
class EnterpriseUserRight {
static belongsTo = [enterpriseUser: EnterpriseUser, enterpriseRight: EnterpriseRight]
EnterpriseUser enterpriseUser
EnterpriseRight enterpriseRight
}
class EnterpriseRight {
public static final String LOGIN = "LOGIN"
public static final String MANAGE_USERS = "MANAGE_USERS"
public static final String MANAGE_SETTINGS = "MANAGE_SETTINGS"
static hasMany = [enterpriseUserRights: EnterpriseUserRight]
String name
}
答案 0 :(得分:2)
我不知道Grails是否也有一个特殊的DSL用于查询,但在HQL中,你会这样做:
select distinct enterprise from EnterpriseUserRight enterpriseUserRight
inner join enterpriseUserRight.enterpriseRight enterpriseRight
inner join enterpriseUserRight.enterpriseUser enterpriseUser
inner join enterpriseUser.enterprise enterprise
where enterpriseRight.name = 'LOGIN'
and enterpriseUser.user = :user
order by enterprise.name