如何在雄辩的laravel中编写此查询?

时间:2017-01-30 20:06:54

标签: php laravel laravel-5.3

我一直试图弄清楚如何用Eloquent写这个?这是我得到的,有什么建议吗?

 $budgets = Budget::join('transactions','budgets.id','=','transactions.category')
                  ->where('transactions.user_id','=', $authId)
                  ->groupby('transactions.category')
                  ->sum('budgets.amount','-','transactions.amount');

下面运行的查询
  SELECT SUM(budgets.amount) - SUM(transactions.amount) as amount,
         budgets.category
    FROM budgets 
    JOIN transactions
      ON budgets.id = transactions.category
GROUP BY category

1 个答案:

答案 0 :(得分:3)

你很接近,但是当你获得多列和数学,或者半复杂的数学(即不是简单的总和)时,你想要将数学作为原始语句中的单独列传递。

Budgets::join('transactions', 'budgets.id', '=', 'transactions.category')
    ->select([
        DB::raw('SUM(budgets.amount) - SUM(transactions.amount) as amount'), 
        'budgets.category'
    ])
    ->where('transactions.user_id','=', $authId)
    ->groupBy('budgets.category')
    ->get();