Laravel query replace new data with old one

问题

Basically this question is following of [link]

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

Explanation

I have appended rows in my blade where several select box will append and i can choose options of each of them. this data will save in database (Until here everything is good)

The issue

comes when I change one of my selected options and instead of being update it will add all selects as new one.

Screenshot 1

Code

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
    }

Screenshot 2

results of dd($spec)

Any idea?

回答1:

Solved

I've changed my function to code below and now everything working fine

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);
    }

Hope it help others.

来源：https://stackoverflow.com/questions/52416297/laravel-query-replace-new-data-with-old-one