public function storeDosage(ProductsRequest $request){
    $file = $request->file('photo');

    $fileName = uniqid() . $photo->getClientOriginalName();

    //move the file to images folder
    $photo->move('medicine/images', $fileName);

    $dosage = $this->dosage;
    $dosage->dosage_name = $request['dosage_name'];
    $dosage->medicine_id = $request['medicine_id'];
    $dosage->price = $request['price'];

    $dosage->save();

    $dosage = Dosage::find($request->input('id'));

    $image = $dosage->image()->create([
      'dosage_id' => $request->input('id'),
      'file_name' => $fileName,
      'file_size' => $file->getClientSize(),
      'file_mime' => $file->getClientMimeType(),
      'file_path' => 'gallery/images'. $fileName,
      'created_by'=> auth()->user()->id,
      ]);
    return redirect()->route('medicineList');
  }