Performing a partial update

pick.php

<?php

MyController extends Controller
{
  public function store(Request $request)
  {
    $interaction = Interaction::create($this->pick((new Interaction)->getFillable(), $request);
  }
  
  /**
    * Get a subset containing the provided keys with values from the input data.
    *
    * @param  array|mixed $keys
    * @param Request $request
    * @return array
    */
    protected function pick($keys, $request)
    {
        $keys = is_array($keys) ? $keys : func_get_args();

        return array_intersect_key($request->all(), array_flip($keys));
    }
  
}