Laravel livewire 线：带数组的模型

Question

我可以从刀片组件中给出有价值的 product_id

<input wire:model="qty.{{$row->product_id}}" value="{{$row->qty}}" max="{{$row->stock}}">

但是我如何从数据库中显示数量，当增加数量时，线模型将工作并更新，我该怎么办？？？

public $qty;
    

    public function render()
    {
        $this->userId=Auth::id();

        if ($this->qty!=null){

            foreach($this->qty as $key => $qty)
            {
                $cart=Cart::where('user_id',$this->userId)->where('product_id',$key)->first();

                if ($cart){
                    $cart->update([
                        'qty'    =>  $qty,
                    ]);
                    $this->emit('refreshCart');
                }

            }

        }

    }

Answer 1

在你的刀片中

<input wire:model="inputs.{{ $loop->index }}.qty" value="{{$row->qty}}" max="{{$row->stock}}">
<a wire:click.prevent="increase({{$loop->index}})"></a>
<a wire:click.prevent="reduce({{$loop->index}})"></a>

在你的 livewire 组件中

public $inputs = [];

    public function mount()
    {
        foreach (Cart::where('user_id',$this->userId)->get() as $item) {
            array_push($this->inputs, [
                "id" => $item->id,
                "qty" => $item->quantity,
            ]);

        }
    }
    public function reduce($index)
    {
        $product_id = $this->inputs[$index]['id'];
        $this->inputs[$index]['qty'] -= 1;
        $this->updateCart($product_id, $this->inputs[$index]['qty']);
    }
    public function increase($index)
    {
        $product_id = $this->inputs[$index]['id'];
        $this->inputs[$index]['qty'] += 1;
        $this->updateCart($product_id, $this->inputs[$index]['qty']);
    }
    public function updateCart($product_id, $productQty)
    {
        //update yourcart here with productID and qty
    }

此代码对我有用。