php – Laravel在单个子句中使用多个where和sum

在我的数据库中我有instagram_actions_histories表,其中我有action_type列,在列中我有不同的数据,如1或2或3

我试图获取关系中的这个表数据,并总结这些存储在列中的值,例如

$userAddedPagesList = auth()->user()->instagramPages()->with([
        'history' => function ($query)  {
            $query->select(['action_type as count'])->whereActionType(1)->sum('action_type');
        }
    ]
)->get();

顺便说一句,这段代码不正确,因为我希望得到所有历史记录中的多个和

whereActionType(1)->sum('action_type')
whereActionType(2)->sum('action_type')
whereActionType(3)->sum('action_type')

例如(pesudo代码)：

$userAddedPagesList = auth()->user()->instagramPages()->with([
        'history' => function ($query)  {
            $query->select(['action_type as like'])->whereActionType(1)->sum('action_type');
            $query->select(['action_type as follow'])->whereActionType(2)->sum('action_type');
            $query->select(['action_type as unfollow'])->whereActionType(3)->sum('action_type');
        }
    ]
)->get();

更新：

$userAddedPagesList = auth()->user()->instagramPages()->with([
        'history' => function ($query) {
            $query->select('*')
                ->selectSub(function ($query) {
                    return $query->selectRaw('SUM(action_type)')
                        ->where('action_type', '=', '1');
                }, 'like')
                ->selectSub(function ($query) {
                    return $query->selectRaw('SUM(action_type)')
                        ->where('action_type', '=', '2');
                }, 'follow')
                ->selectSub(function ($query) {
                    return $query->selectRaw('SUM(action_type)')
                        ->where('action_type', '=', '3');
                }, 'followBack');
        }
    ]
)->get();

错误：

Syntax error or access violation: 1140 Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause (SQL: select *, (select SUM(action_type) where `action_type` = 1) as `like`, (select SUM(action_type) where `action_type` = 2) as `follow`, (select SUM(action_type) where `action_type` = 3) as `followBack` from `instagram_actions_histories` where `instagram_actions_histories`.`account_id` in (1, 2, 3))

我该如何实施这个解决方案？

更新：

InstagramAccount类：

class InstagramAccount extends Model
{
    ...

    public function schedule()
    {
        return $this->hasOne(ScheduleInstagramAccounts::class, 'account_id');
    }

    public function history()
    {
        return $this->hasMany(InstagramActionsHistory::class, 'account_id');
    }
}

InstagramActionsHistory类：

class InstagramActionsHistory extends Model
{
    protected $guarded=['id'];

    public function page(){
        return $this->belongsTo(InstagramAccount::class);
    }
}

用户类：

class User extends Authenticatable
{
    use Notifiable;

    ...

    public function instagramPages()
    {
        return $this->hasMany(InstagramAccount::class);
    }
}

解决方法:

另一种获取不同类型动作的条件求和的方法,你可以在InstagramAccount模型中定义一个hasOne()关系,如

public function history_sum()
{
    return $this->hasOne(InstagramActionsHistory::class, 'account_id')
        ->select('account_id',
            DB::raw('sum(case when action_type = 1 then 0 END) as `like`'),
            DB::raw('sum(case when action_type = 2 then 0 END) as `follow`'),
            DB::raw('sum(case when action_type = 3 then 0 END) as `followBack`')
        )->groupBy('account_id');
}

然后你可以急切加载相关数据

$userAddedPagesList = auth()->user()->instagramPages()->with('history_sum')->get();

使用此方法将仅执行一个额外查询,以根据您的条件获得3个不同的总和结果

select `account_id`,
sum(case when action_type = 1 then action_type else 0 END) as `like`, 
sum(case when action_type = 2 then action_type else 0 END) as `follow`, 
sum(case when action_type = 3 then action_type else 0 END) as `followBack` 
from `instagram_actions_histories` 
where `instagram_actions_histories`.`account_id` in (?, ?, ?) 
group by `account_id`

虽然与其他方法(也是有效答案)相比,使用withCount将为每种操作类型添加3个相关的相关子查询,这可能导致性能开销,生成的查询将如下所示

select `instagram_account`.*, 
(select sum(action_type) from `instagram_actions_histories` where `instagram_account`.`id` = `instagram_actions_histories`.`account_id` and `action_type` = ?) as `like`, 
(select sum(action_type) from `instagram_actions_histories` where `instagram_account`.`id` = `instagram_actions_histories`.`account_id` and `action_type` = ?) as `follow`,
(select sum(action_type) from `instagram_actions_histories` where `instagram_account`.`id` = `instagram_actions_histories`.`account_id` and `action_type` = ?) as `followBack`
from `instagram_account` 
where `instagram_account`.`user_id` = ? 
and `instagram_account`.`user_id` is not null

要检查生成的查询,请参阅Laravel 5.3 – How to log all queries on a page?

标签：laravel-5-6,php,laravel
来源： https://codeday.me/bug/20191001/1840034.html