Question

我有一个代码：

$orders = Order::all();
$allorders = $orders->count();
$deliveryQuery = $orders->where('status', '=', '8')->select(DB::raw('AVG(updated_at) as order_average'))->first();

我收到错误：

Method select does not exist.

我该如何解决？如果我这样做，我的代码正在运行：

$deliveryQuery = Order::where('status', '=', '8')->select(DB::raw('AVG(updated_at) as order_average'))->first();

但这不好，我想要1个查询，但不是2 ..

更新

$orders->where('status', '=', '8')->avg('updated_at')->first();

我可以使用这段代码吗？但它不起作用。获取错误：

Object of class Illuminate\Support\Carbon could not be converted to int

Answer 1

all（）方法返回Collection。然后，您可以对结果使用Collection methods，但where（）和select（）是QueryBuilder类的方法。

$query = Order::query(); // You can get the query builder this way.

$orders = Order::all(); // equivalent to $query->get(); => return a Collection

$orderCount = Order::count(); // equivalent to $query->count();
$orderCount = $orders->count(); // here $orders is a Collection and the count() method is from the Collection class

当您调用avg（）时，您将从Collection类中调用它。但它只能对数字起作用，而且Laravel会将updated_at属性解析为Carbon日期。

您的代码可能是：

$query = Order::query();
$orders = $query->get();
$allorders = $query->count();
$deliveryQuery = $query->where('status', '=', '8')->select(DB::raw('AVG(updated_at) as order_average'))->first();

Answer 2

你可以试试这个..

const https = require('https');
const request = require('request');

request({
    'url':'https://teamtreehouse.com/chalkers.json',
    'proxy':'http://xx.xxx.xxx.xx'
    },
    function (error, response, body) {
        if (!error && response.statusCode == 200) {
            var data = body;
            console.log(data);
        }
    }
);

可以找到类似的问题here

Laravel方法全部并选择不起作用

2 个答案: