Laravel。如何在列的每一行中保存一个新值？

Question

我有一个table，请看下面migration：

Schema::create('products', function (Blueprint $table) {
        $table->id();
        $table->integer('group');
        $table->string('code');
        $table->string('name');
        $table->double('price');
        $table->timestamps();
    });

我想将每行的 column = price 增加一个我从 input form 收到的值。我能够看到我能够检索然后增加的价格，但我正在努力弄清楚如何在增加时保存每个值。

我尝试了什么：

public function increase(Request $request){

    $products = DB::table('products')->select('price')->get();
    $percentage = $request['increase'];

    foreach ($products as $product) {
       $price = $product->price * ((100 + $percentage)/100);
       $product->price = $price;
       $product->save();
    }

}

但是我收到一个错误，Call to undefined method stdClass::save()

Answer 1

您可以在一条语句中完成：

 $percentage = $request['increase'];

   DB::table('products')->update(['price'=> DB::raw("price * ((100 + {$percentage})/100)")]);

Laravel。如何在列的每一行中保存一个新值？

Laravel. How to save a new value in each row of a column?

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