/**
* Show the form for editing the specified resource.
*
* @param int $id
* @return \Illuminate\Http\Response
*/
public function edit($id)
{
$categories = Category::lists('name', 'id');
$merchants = Merchant::lists('name', 'id');
$coupon = Coupon::find($id);
return view('admin.coupon.update', compact('categories', 'merchants'))->with('coupon', $coupon);
}
