public function update(PostUpdateRequest $request, $id)
    {
        $post = Post::findOrFail($id);
        $post->fill($request->postFillData());
        $post->save();
        $post->syncTags($request->get('tags', []));

        Session::put('_update-post', trans('canvas::messages.update_success', ['entity' => 'Post']));

        return redirect()->route('canvas.admin.post.edit', $id);
    }