Question

我正在建立网络以与laravel点餐。如果用户将相同的食物添加到购物车中，食物的数量将会增加。我创建了3个模型：OrderDetail，OrderOptionDetail，SubOption

食物模型：

struct JobResponseDataObject: Codable {
    var id: Int?
    var requestId: String?
    var businessName: String?
    var businessEmail: String?
    var title: String?

    private enum CodingKeys: String, CodingKey {
        case id = "id"
        case requestId = "request_id"
        case businessName = "business_name"
        case businessEmail = "business_email"
        case title = "title"
    }
}

let json = JSON(responseJSON: jsonData)
    do {
        if let value = try? json.rawData(){
            let response = try! JSONDecoder().decode([[JobResponseDataObject]].self, from: value)
        }

    } catch {
        print(error.localizedDescription)
}

FoodOption模型：

public function food_options(){
    return $this->hasMany(FoodOption::class);
}
public function order_detail(){
    return $this->hasMany(OrderDetail::class);
}

OrderDetail模型：

public function sub_options(){
    return $this->hasMany(SubOption::class);
}

OrderOptionDetail模型：

protected $fillable = [
    'order_id','food_id', 'quantity'
];
public function order_option_detail(){
    return $this->hasMany(OrderOptionDetail::class);
}
public function food(){
    return $this->belongsTo(Food::class);
}

SubOption模型：

protected $fillable = [
    'order_detail_id', 'option_id','sub_option_id'
];
public function sub_option(){
    return $this->belongsTo(SubOption::class);
}

在控制器中：

 use Translatable;

public $translatedAttributes = [
    'name'
];
protected $fillable = [
    'food_option_id',
    'price'
];

例如：奶茶的FoodOption为Size，子选项为S（$ 0），M（$ 1），L（$ 1.5）。在购物车中已经存在数量= 1的S奶茶。如果用户选择S奶茶，然后再次添加到购物车。数量将增加到2。如何在控制器中检查这一点。非常感谢大家！

Answer 1

您可以检查此订单是否存在，然后将其添加到数量中并保存，否则创建新记录，还需要显示所选选项的“ selected_option”输入：

        $orderDetail =  OrderDetail::where(['food_id' => $request->input('food'), 
        'order_id' => $order->id])->first();
        $check = $orderDetail->sub_option->where("food_option_id",$request->input('selected_option'));
    ...
    if($check->exists()){
        //$orderDetail =  OrderDetail::where(['food_id' => $request->input('food'), 
        //'order_id' => $order->id])->first();
        $orderDetail1->quantity += 1;
        $orderDetail1->save();
    }else{
        $orderDetail = new OrderDetail();
        ......
    }

如果用户将相同的食物添加到购物车Laravel，则增加食物的数量

1 个答案: