如何在 Laravel 中打印出包含多个产品的所有订单？

Posted 2023-03-14

【中文标题】如何在 Laravel 中打印出包含多个产品的所有订单？

【英文标题】：How to print out all orders with multiple products in Laravel?

【发布时间】：2020-10-01 17:33:16

【问题描述】：

我想打印出所有包含产品的订单。我不知道如何构建 sql 查询以返回每个订单一次。如您所见，它两次返回 id 为 4 的订单，因为其中有 2 个产品。

控制器

$orders = DB::table('order')
            ->join('customer', 'order.customer_id', '=', 'customer.id')
            ->leftjoin('order_meal', 'order.id', '=', 'order_meal.order_id')
            ->select('order.*', 'customer.firstname', 'customer.lastname', 'customer.country', 'customer.city', 'customer.zipcode', 'customer.address', 'customer.phone', 'order_meal.id AS order_meal_id')
            ->where('order.restaurant_id', '=', $restaurantID)
            ->orderBy('order.created_at', 'ASC')
            ->get();
        if ($orders === null) 
            return redirect('/');
        

        return view('/pages/orders', [
            'pageConfigs' => $pageConfigs, 'orders' => $orders
        ]);

查看： $orders

以 JSON 格式插入的数据

“餐厅 ID”：1， “客户 ID”：1， “is_delivery”：1， “is_online_payment”：1， “一顿饭”： [ “meal_id”：23， “数量”：1， “附加”：[ “extra_id”：10 ] , “meal_id”：24， “数量”：1， “附加”：[ “extra_id”：13 ] ]

结果 ["id":4,"customer_id":1,"restaurant_id":1,"is_delivery":1,"delivery_price":0,"coupon":null,"coupon_sale":" 0","is_online_payment":1,"total_price":0,"is_paid":0,"created_at":"2020-06-11 22:15:05","updated_at":"2020-06-11 22: 15:05","firstname":"Dominik","lastname":"Balogh","country":"Magyarorsz\u00e1g","city":"Szentendre","zipcode":2000,"address":" Vxxxxxxxxxxxxxxxx 7.","电话":"06303900000","order_meal_id":80,

"id":4,"customer_id":1,"restaurant_id":1,"is_delivery":1,"delivery_price":0,"coupon":null,"coupon_sale" :"0","is_online_payment":1,"total_price":0,"is_paid":0,"created_at":"2020-06-11 22:15:05","updated_at":"2020-06-11 22:15:05","firstname":"Dominik","lastname":"Balogh","country":"Magyarorsz\u00e1g","city":"Szentendre","zipcode":2000,"address" :"Vxxxxxxxxxxxxxxxxxx 7.","电话":"06303900000","order_meal_id":81]

数据库 客户表：

订单表：

order_meal 表（产品）

结果应该是这样的：

["id":4,"customer_id":1,"restaurant_id":1,"is_delivery":1,"delivery_price":0,"coupon":null,"coupon_sale":"0","is_online_payment":1,"total_price":0,"is_paid":0,"created_at":"2020-06-11 22:15:05","updated_at":"2020-06-11 22:15:05","order_meal":["id":80,"order_id":4,"meal_id":23,"quantity":1,"price":1850,"created_at":"2020-06-11 22:15:05","updated_at":"2020-06-11 22:15:05","id":81,"order_id":4,"meal_id":24,"quantity":1,"price":1890,"created_at":"2020-06-11 22:15:05","updated_at":"2020-06-11 22:15:05"]]

【问题讨论】：

尝试通过将 ->unique() 应用于集合来删除重复项。喜欢$orders->unique()你也可以看看link

它对我不起作用。一个订单应该有多个order_meal，是否可以将所有的ordermeal作为一个数组获取？

有没有和distinct一样的方法

【参考方案1】：

我找到了解决办法！ 您必须在模型中设置关系！

order.php 模型

class Order extends Model

    public $table = "order";
    protected $fillable = [
        'customer_id', 
        'restaurant_id', 
        'is_delivery', 
        'delivery_price', 
        'coupon', 
        'coupon_sale', 
        'is_online_payment',
        'total_price',
        'is_paid'
    ];

    public function ordermeal()
        return $this->hasMany('App\OrderMeal','order_id','id');
    

    public function customer()
        return $this->hasOne('App\Customer','id','customer_id');
    

ordermeal.php 模型

class OrderMeal extends Model

    public $table = "order_meal";
    protected $fillable = [
        'order_id', 
        'meal_id', 
        'quantity', 
        'price'
    ];

    public function order()
        return $this->belongsTo('App\Order','order_id','id');
    

    public function ordermealextras()
        return $this->hasMany('App\OrderMealExtras','order_meal_id','id');
    

    public function meal()
        return $this->hasOne('App\Meal','id','meal_id');
    

控制器

 $orders = Order::where('restaurant_id', '=', $restaurantID)->orderBy('created_at', 'ASC')
        ->with('customer')
        ->with('ordermeal.meal')
        ->with('ordermeal.ordermealextras')->get();


        return view('/pages/orders', [
            'pageConfigs' => $pageConfigs, 'orders' => $orders
        ]);

【讨论】：

模型中的关系是正确简单的方法，你打给我贴吧