如何在Laravel中发出查询？

Question

我需要在Laravel中为图表创建查询。

我需要创建这个json文件：

例如：（30天前）

[{
            "day": "23",
            "count": 20
        }, {
            "day": "22",
            "visits": 10
        }, {
            "day": "21",
            "visits": 12
        }, {
            "day": "20",
            "visits": 30
        }, {
            "day": "19",
            "visits": 20
        }, {
            "day": "18",
            "visits": 10
        }, 
         .
         .
         .
         .
        }, {
            "day": "22",
            "visits": 10
        }]

我在Laravel的代码是：

 $date = Carbon::today()->subDays(30);
 $ordersChart = Order::selectRaw('dayname(created_at) day, count(*) count')
        ->where('created_at', '>=', $date)
        ->groupBy('day')
        ->latest()
        ->get();

但在返回$ordersChart后显示此错误：

SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'laravel.orders.created_at' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by (SQL: select dayname(created_at) day, count(*) count from `orders` where `created_at` >= 2018-03-20 00:00:00 group by `day` order by `created_at` desc)

如何发出此问题？

Answer 1

您必须使用->latest('day')。

Answer 2

你必须使用：

1- dayname(created_at) =＆gt; day(created_at)

2- latest() =＆gt; latest('day')

$ordersChart = Order::selectRaw('day(created_at) day, count(*) count')
    ->where('created_at', '>=', $date)
    ->groupBy('day')
    ->latest('day')
    ->get();