go - gorm 查询 OR

Question

我一直在生成一个在运行时动态创建的查询。

我想在中间创建一个having查询，例如OR

SELECT name FROM `user_group`  WHERE ((group_key = 'age' AND group_value = '20')) 

OR ((group_key = 'division' AND group_value = 'accounting')) 
OR ((group_key = 'age' AND group_value = '22')) 
OR ((group_key = 'division' AND group_value = 'kitchen'))

GROUP_BY name
HAVING 
((SUM(group_key = 'age' AND group_value = '20') > 0) 
AND 
(SUM(group_key = 'division' AND group_value = 'accounting') > 0))

OR 

((SUM(group_key = 'age' AND group_value = '22') > 0) 
AND 
(SUM(group_key = 'division' AND group_value = 'kitchen') > 0))

请注意，OR内部having声明是我要问的。

我目前用gorm得到了这个：

SELECT name FROM `user_group`  WHERE ((group_key = 'age' AND group_value = '20')) 

OR ((group_key = 'division' AND group_value = 'accounting')) 
OR ((group_key = 'age' AND group_value = '22')) 
OR ((group_key = 'division' AND group_value = 'kitchen'))

GROUP_BY name
HAVING 
((SUM(group_key = 'age' AND group_value = '20') > 0) 
AND 
(SUM(group_key = 'division' AND group_value = 'accounting') > 0))

AND 

((SUM(group_key = 'age' AND group_value = '22') > 0) 
AND 
(SUM(group_key = 'division' AND group_value = 'kitchen') > 0))

注意声明AND中的having

这是查询生成：

for _, condition := range resp.Allow.Conditions {
    for key, val := range condition {
        if len(key) <= 0 || len(val) <= 0 {
            continue
        }
        groupQuery = groupQuery.Or("(group_key = ? AND group_value = ?)", key, val)
        groupQuery = groupQuery.Having("SUM(group_key = ? AND group_value = ?) > 0", key, val)
    }
}
groupQuery = groupQuery.Group('name')

有什么方法可以做到这一点gorm吗？我查看了文档，我最好的选择是它必须是一个原始的 sql 查询。我不喜欢它，但如果这是唯一的方法，那也没关系。

注意：我使用 mysql 作为方言

标签： gogo-gorm

Answer 1

该行的输出：

    groupQuery = groupQuery.Having("SUM(group_key = ? AND group_value = ?) > 0", key, val)

是块

((SUM(group_key = 'age' AND group_value = '20') > 0) 
AND 
(SUM(group_key = 'division' AND group_value = 'accounting') > 0))

AND 

((SUM(group_key = 'age' AND group_value = '22') > 0) 
AND 
(SUM(group_key = 'division' AND group_value = 'kitchen') > 0))

哪个是对的。查看每行的所有左括号和右括号：

````(COND1) AND (COND2) AND (COND3) AND (COND4)```

根据您的要求获得一个单一的或在有声明的中间：

((SUM(group_key = 'age' AND group_value = '20') > 0) 
AND 
(SUM(group_key = 'division' AND group_value = 'accounting') > 0))

AND 

((SUM(group_key = 'age' AND group_value = '22') > 0) 
AND 
(SUM(group_key = 'division' AND group_value = 'kitchen') > 0))

这将是：

(COND1) AND (COND2) OR (COND3) AND COND(4)

会导致不太预期的结果。

更合乎逻辑的是：

(COND1) OR (COND2) OR (COND3) OR COND(4)

或者：

((COND1) AND (COND2)) OR ((COND3) AND COND(4))

最后一个版本（这似乎是您的目标），不能如所述在循环中生成，并且需要特定的方法。

看起来你几乎只能使用原始 SQL。