有 OR 查询的 gorm

Question

我一直在生成一个在运行时间内动态创建的查询。

我想创建一个中间带有 OR 的 having 查询，例如

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，having 语句中的 OR 正是我要问的。

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having语句中的AND

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')

在gorm中有什么方法可以做到这一点吗？我查看了文档，我认为它必须是原始 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

Answer 1

该行的输出：

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

是区块

((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))

这是正确的。查看每行的所有左括号和右括号：

````(条件 1) 和 (条件 2) 和 (条件 3) 和 (条件 4)```

按照您的要求获取单个或中间的 having 语句：

((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)

会导致不尽如人意的结果。

更合乎逻辑的是：

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

或：

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

最后一个版本（这似乎是您的目标）无法按规定在循环中生成，需要特定的方法。

看起来你在这方面几乎只能是原始的 SQL。

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