Javascript to Laravel controller

Hello

I have a view for edit (update) items, this item contains attachments (files).

My objective is when the user will delete the file, he clicks on a button, this button generates a javascript array listing the files to delete. And when the user sends the form, the file is deleted and the inputs of item are updated.

For this, I send an ajax method, the problem is the ajax method just send my array. But I want to send the array and my inputs to update like that the controller can delete the file or/and update inputs, all at the same time.

Actually, my code deletes my attachment, but it's return an error because the inputs are null. When I comment the code for update an item, the view is not returned.

My ajax method (javascript)

$('form.ajax').on('submit', function(event){
  //event.preventDefault();

  var formData = {
    _token : $('meta[name=csrf-token]').attr('content'),
    _method : 'PUT',
    attachments_to_delete : attachments_to_delete
  }

  $.ajax({
    method     : "POST",
    // url      : $(this).attr('action') + '/store',
    url      : $(this).attr('action'),
    data     : formData,
    cache    : false,

    success  : function(data) {
        console.log(data);
    }
  })

  return false;
});

My controller

public function update(Request $request, $id)
    {
        //dd($request);
        foreach ($request->attachments_to_delete as $id_attachment) {
            $attachment = ClientAttachment::find($id_attachment);

            $attachment->delete();
        }

        $client = Client::findOrFail($id);
        $client->update([
            'name' => $request->name,
            'firstname' => $request->firstname,
            'date_of_birth' => $request->date_of_birth,
            'email' => $request->email,
            'telephone' => $request->telephone,
            'mobile' => $request->mobile,
            'pro_mobile' => $request->pro_mobile,
            'street' => $request->street,
            'locality' => $request->locality,
            'country' => $request->country,
            'note' => $request->note,
            'active' => $request->active ? 1 : 0,
        ]);

        Flashy::message('Client modifié avec succès!', route('client.show', $client));

        return Redirect::route('client.show', $client);
    }

Thanks for answer