Laravel使用memcached缓存对文章增删改查进行优化的方法

<?php  namespace App/Http/Controllers;  use Illuminate/Http/Request;  use Cache;  use App/Models/Post;  use App/Http/Requests;  use App/Http/Controllers/Controller;  class PostController extends Controller  {    /**     * 显示文章列表.     *     * @return Response     */    public function index()    {      //使用all获取所有数据，如果数据量大采用分页获取      $posts = Post::all();      if(!$posts)        exit('还没有发布任何文章！');      $html = '<ul>';      foreach ($posts as $post) {        $html .= '<li><a href='.route('post.show',['post'=>$post]).'>'.$post->title.'</li>';      }      $html .= '</ul>';      return $html;    }    /**     * 创建新文章表单页面     *     * @return Response     */    public function create()    {      $postUrl = route('post.store');      $csrf_field = csrf_field();      $html = <<<CREATE        <form action="$postUrl" method="POST">          $csrf_field          <input type="text" name="title"><br/><br/>          <textarea name="content" cols="50" rows="5"></textarea><br/><br/>          <input type="submit" value="提交"/>        </form>CREATE;      return $html;}    /**     * 将新创建的文章存储到存储器     *     * @param Request $request     * @return Response     */    public function store(Request $request)    {      $title = $request->input('title');      $content = $request->input('content');      $post = new Post;      $post->title = $title;      $post->content = $content;      $post->save();      return redirect()->route('post.show',['post'=>$post]);    }    /**     * 显示指定文章     *     * @param int $id     * @return Response     */    public function show($id)    {      $post = Cache::get('post_'.$id);      if(!$post){        $post = Post::find($id);        if(!$post)          exit('指定文章不存在！');        Cache::put('post_'.$id,$post,60*24*7);      }      if(!Cache::get('post_views_'.$id))        Cache::forever('post_views_'.$id,0);      $views = Cache::increment('post_views_'.$id);      Cache::forever('post_views_'.$id,$views);      $editUrl = route('post.edit',['post'=>$post]);      $deleteUrl = route('post.destroy',['post'=>$post]);      $html = <<<POST        <h3>{$post->title}</h3>        <p>{$post->content}</p>        <i>已有{$views}人阅读</i>        <p>          <a href="{$editUrl}">编辑</a>        </p>POST;      return $html;    }    /**     * 显示编辑指定文章的表单页面     *     * @param int $id     * @return Response     */    public function edit($id)    {      $post = Post::find($id);      if(!$post)        exit('指定文章不存在！');      $postUrl = route('post.update',['post'=>$post]);      $csrf_field = csrf_field();      $html = <<<CREATE        <form action="$postUrl" method="POST">          $csrf_field          <input type="hidden" name="_method" value="PUT"/>          <input type="text" name="title" value="{$post->title}"><br/><br/>          <textarea name="content" cols="50" rows="5">{$post->content}</textarea><br/><br/>          <input type="submit" value="提交"/>        </form>CREATE;      return $html;    }    /**     * 在存储器中更新指定文章     *     * @param Request $request     * @param int $id     * @return Response     */    public function update(Request $request, $id)    {      $post = Post::find($id);      if(!$post)        exit('指定文章不存在！');      $title = $request->input('title');      $content = $request->input('content');      $post->title = $title;      $post->content = $content;      $post->save();      return redirect()->route('post.show',['post'=>$post]);    }    /**     * 从存储器中移除指定文章     *     * @param int $id     * @return Response     */    public function destroy($id)    {      $post = Post::find($id);      if(!$post)        exit('指定被删除文章不存在！');      if($post->delete()){        redirect()->route('post.index');      }else{        exit('删除文章失败！');      }    }  }

//保存之后更新缓存数据Post::saved(function($post){  $cacheKey = 'post_'.$post->id;  $cacheData = Cache::get($cacheKey);  if(!$cacheData){    Cache::add($cacheKey,$post,60*24*7);  }else{    Cache::put($cacheKey,$post,60*24*7);  }});//删除之后清除缓存数据Post::deleted(function($post){  $cacheKey = 'post_'.$post->id;  $cacheData = Cache::get($cacheKey);  if($cacheData){    Cache::forget($cacheKey);  }  if(Cache::get('post_views_'.$post->id))    Cache::forget('post_views_'.$post->id);});