Laravel 查询用旧数据替换新数据

Laravel query replace new data with old one

Basically this question is following of

As that question got too messy I want to separate the question here.

说明

我在我的 blade 中附加了行,其中将附加几个 select 框,我可以选择每个框的选项。此数据将保存在数据库中(到这里一切都很好

问题

当我更改我的 selected 选项之一时出现,而不是更新它会将所有 select 作为新选项添加​​。

截图 1

代码

controller

public function spacssendto(Request $request) {
        $this->validate($request, array(
          'product_id' => 'required',
          'subspecifications' => 'required',
        ));

        // get all selected option
        $looped = $request->subspecifications;
        $spec = [];
        if(!empty($looped)){ //check if there is any select box without option
          foreach($looped as $sub) {
              $sub = Subspecification::find($sub);
              if (!empty($sub->id)) {
                  $data = (
                    [
                      'product_id' => $request->product_id,
                      'subspecification_id' => $sub->id,
                    ]
                  );
                  array_push($spec, $data);
              }
          }
      }
      dd($spec);
    //   DB::table('product_subspecification')->insert($spec); // save data to database
    }

截图2

dd($spec)

的结果

有什么想法吗?

已解决

我已将函数更改为以下代码,现在一切正常

public function spacssendto(Request $request) {
        $this->validate($request, array(
          'product_id' => 'required',
          'subspecifications' => 'required',
        ));
        $collection = collect($request->subspecifications)->map(function ($name) {
            return strtoupper($name);
        })
        ->reject(function ($name) {
            return empty($name);
        });
      $product = Product::find($request->product_id);
      $product->subspecifications()->sync($collection);
    }

希望对其他人有所帮助。