Php 在视图编辑时更新表列

我正在处理Laravel，当用户编辑他以前的输入时，我试图得到一个表更新列的值（比如他搞糟了，不得不编辑他的顺序）

我的桌子：

材料：

| id | name | count_all | count_current | price_unit |

订单：

| id | count_order | material_id | invoice_id |

My OrderController更新功能：

public function update(Request $request, order $order){
    if(isset($_POST['delete'])){
        $order->delete();
        return redirect('/order');
    }
    else{
        $order->material_id = $request->material_id;
        $order->invoice_id = $request->invoice_id;
        $order->count_order = $request->count_order;

        $count_order = $request->input('count_order');
        $query = $order->save();
        if($query){
            if($count_order > $request->count_order){
                DB::table('materials')
                    ->where('id', $request->material_id)
                    ->increment('count_all', ($count_order - $request->count_order));
                DB::table('materials')
                    ->where('id', $request->material_id)
                    ->increment('count_current', ($count_order - $request->count_order));
            }
            elseif($count_order < $request->count_order){
                DB::table('materials')
                    ->where('id', $request->material_id)
                    ->decrement('count_all', ($request->count_order - $count_order));
                DB::table('materials')
                    ->where('id', $request->material_id)
                    ->decrement('count_current', ($request->count_order - $count_order));                    
            }
        }
        return redirect('/order');
   }
}

因此，在下订单时，它会更新物料表中的值，即：

| id = 1 | Pen | count_all + 20 | count_current + 20 | 1$ |

这意味着当您下订单时，count\u all和count\u current将随着count\u订单的值增加。现在，当我将编辑我的订单时，因为我犯了一个错误，我想订购15支而不是20支笔，它应该相应地从材料表中减去（或添加，如果值更大），以便列中的值是正确的

在控制器中处理插入的函数是：

public function insert(Request $request){

    $order = new order;

    $order->material_id = $request->material_id;
    $order->invoice_id = $request->invoice_id;
    $order->count_order = $request->count_order;

    $query = $order->save();
    if($query){
        DB::table('materials')
            ->where('id', $request->material_id)
            ->increment('count_all', $request->count_order);
        DB::table('materials')
            ->where('id', $request->material_id)
            ->increment('count_current', $request->count_order);
    }
    return redirect('/order');
}

---

这是简化版。首先测试是否同时更新订单和物料表

public function update(Request $request, $id){
    if(isset($_POST['delete'])){
        $order->delete();
        return redirect('/order');
    }
    else{
        $order = Order::findOrFail($id);
        $order->material_id = $request->material_id;
        $order->invoice_id = $request->invoice_id;
        $order->count_order = $request->count_order;
        $order->save();

        $materialID = $request->material_id;
        $countOrder = $request->count_order;

        DB::table('materials')
            ->where('id', $materialID)
            ->increment('count_all', $countOrder);
        DB::table('materials')
            ->where('id', $materialID )
            ->increment('count_current', $countOrder);     

        return redirect('/order');
   }
}

---

你能说说你得到的结果或错误吗？我没有得到任何错误。我编辑了订单，但不更新物料表中的值。所以只是我的代码不起作用。这里的顺序是什么<代码>公共功能更新（Request$Request，order$order）Model？$order是Orders表中对应行的值（例如id 2、count\u order 10、material\u id 1、invoice\u id 1-您要编辑的内容）。让我们来看看。

public function update(Request $request, $id){
    if(isset($_POST['delete'])){
        $order->delete();
        return redirect('/order');
    }
    else{
        $order = Order::findOrFail($id);
        $order->material_id = $request->material_id;
        $order->invoice_id = $request->invoice_id;
        $order->count_order = $request->count_order;
        $order->save();

        $materialID = $request->material_id;
        $countOrder = $request->count_order;

        DB::table('materials')
            ->where('id', $materialID)
            ->increment('count_all', $countOrder);
        DB::table('materials')
            ->where('id', $materialID )
            ->increment('count_current', $countOrder);     

        return redirect('/order');
   }
}