Laravel如何排除providers_total值为0的查询结果行?
问题描述
我正在执行查询并将结果保存到文件,查询语句如下:
$providers = groups::select('groups.id', DB::raw('count(DISTINCT groups_selection_filter.objectFK) as providers_total'))
但结果中存在providers_total计数为0的客户实例,例如:
1759 => array:5 [ "id" => 1759 "name" => "Test Client" "provider_count" => 0 "sport_count" => 1 "sport_name" => "Soccer" ]
我需要移除这类客户结果,尝试过whereNot和HAVING方法:
->havingRaw(DB::raw('count(DISTINCT groups_selection_filter.objectFK)', '!==', 0))
但至今未成功,求可行解决思路?
可行解决思路
- 修正
havingRaw的写法:你当前的havingRaw嵌套错误,而且SQL里不等于用<>而非PHP的!==。正确写法二选一:// 写法1:用havingRaw ->havingRaw('count(DISTINCT groups_selection_filter.objectFK) <> 0') // 写法2:用Laravel的having方法 ->having(DB::raw('count(DISTINCT groups_selection_filter.objectFK)'), '>', 0) - 更换关联类型:如果查询用了
leftJoin,左联会保留所有groups记录(哪怕无匹配筛选数据)。改成join(内联),只保留有对应筛选记录的groups,自然不会出现计数为0的情况:$providers = groups::select('groups.id', DB::raw('count(DISTINCT groups_selection_filter.objectFK) as providers_total')) ->join('groups_selection_filter', 'groups.id', '=', 'groups_selection_filter.group_id') // 替换为你的实际关联字段 ->groupBy('groups.id') ->get(); - 左联下过滤空值:如果必须用左联,可通过
whereNotNull筛选出有有效objectFK的记录,再分组统计:$providers = groups::select('groups.id', DB::raw('count(DISTINCT groups_selection_filter.objectFK) as providers_total')) ->leftJoin('groups_selection_filter', 'groups.id', '=', 'groups_selection_filter.group_id') ->whereNotNull('groups_selection_filter.objectFK') ->groupBy('groups.id') ->get();
内容的提问来源于stack exchange,提问作者Yorkata008
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