V1.17

完成缓存功能

Author: michaelweixi

backend/controllers/PostController.php

@@ -38,7 +38,7 @@ public function behaviors()
         								'roles' => ['?'],
         						],
         				[
-        				'actions' => ['view', 'index', 'create','update'],
+        				'actions' => ['view', 'index', 'create','update','delete'],
         				'allow' => true,
         				'roles' => ['@'],
         			],

database/README.md

@@ -36,6 +36,7 @@
 
 源码版本:V1.16 ————— 同上
 
+源码版本:V1.17 ————— 同上
 ————————————————————————————————————————
 
 注：V1.5也可以在V1.4基础上执行下面这句SQL语句得到：

frontend/components/TagsCloudWidget.php

@@ -30,6 +30,7 @@ public function run()
 					' <h'.$weight.' style="display:inline-block;"><span class="label label-'
 					.$fontStyle[$weight].'">'.$tag.'</span></h'.$weight.'></a>';
 		}
+		sleep(3);
 		return $tagString;
 
 	}

frontend/controllers/PostController.php

@@ -13,6 +13,7 @@
 use common\models\Tag;
 use common\models\Comment;
 use common\models\User;
+use yii\rest\Serializer;
 
 /**
  * PostController implements the CRUD actions for Post model.
@@ -51,6 +52,36 @@ public function behaviors()
         						],
         						],
 
+        	'pageCache'=>[
+        			'class'=>'yii\filters\PageCache',
+        			'only'=>['index'],
+        			'duration'=>600,
+        			'variations'=>[
+        					Yii::$app->request->get('page'),
+        					Yii::$app->request->get('PostSearch'),
+        			],
+        			'dependency'=>[
+        					'class'=>'yii\caching\DbDependency',
+        					'sql'=>'select count(id) from post',
+        			],
+        	],
+        		
+        	'httpCache'=>[
+        			'class'=>'yii\filters\HttpCache',
+        			'only'=>['detail'],
+        			'lastModified'=>function ($action,$params){
+        				$q = new \yii\db\Query();
+        				return $q->from('post')->max('update_time');
+        			},
+        			'etagSeed'=>function ($action,$params) {
+        				$post = $this->findModel(Yii::$app->request->get('id'));
+        				return serialize([$post->title,$post->content]);
+        			},
+        			
+        			'cacheControlHeader' => 'public,max-age=600',
+        			
+        	],
+        		
 
         ];
     }

frontend/views/post/index.php

@@ -5,6 +5,9 @@
 use yii\widgets\ListView;
 use frontend\components\TagsCloudWidget;
 use frontend\components\RctReplyWidget;
+use common\models\Post;
+use yii\caching\DbDependency;
+use yii\caching\yii\caching;
 
 /* @var $this yii\web\View */
 /* @var $searchModel common\models\PostSearch */
@@ -43,10 +46,27 @@
 			<div class="searchbox">
 				<ul class="list-group">
 				  <li class="list-group-item">
-				  <span class="glyphicon glyphicon-search" aria-hidden="true"></span> 查找文章
+				  <span class="glyphicon glyphicon-search" aria-hidden="true"></span> 查找文章（
+				  <?php 
+				  //数据缓存示例代码
+				  /*
+				  $data = Yii::$app->cache->get('postCount');
+				  $dependency = new DbDependency(['sql'=>'select count(id) from post']);
+				  
+				  if ($data === false)
+				  {
+				  	$data = Post::find()->count();  sleep(5);
+				  	Yii::$app->cache->set('postCount',$data,600,$dependency); //设置缓存60秒后过期
+				  }
+				  
+				  echo $data;
+				  */
+				  ?>
+				  <?= Post::find()->count();?>
+				  ）
 				  </li>
 				  <li class="list-group-item">				  
-					  <form class="form-inline" action="index.php?r=post/index" id="w0" method="get">
+					  <form class="form-inline" action="<?= Yii::$app->urlManager->createUrl(['post/index']);?>" id="w0" method="get">
 						  <div class="form-group">
 						    <input type="text" class="form-control" name="PostSearch[title]" id="w0input" placeholder="按标题">
 						  </div>
@@ -63,7 +83,19 @@
 				  <span class="glyphicon glyphicon-tags" aria-hidden="true"></span> 标签云
 				  </li>
 				  <li class="list-group-item">
-				  <?= TagsCloudWidget::widget(['tags'=>$tags])?>
+				  <?php 
+				  //片段缓存示例代码
+				  /*
+				  $dependency = new DbDependency(['sql'=>'select count(id) from post']);
+				  
+				  if ($this->beginCache('cache',['duration'=>600],['dependency'=>$dependency]))
+				  {
+				  	echo TagsCloudWidget::widget(['tags'=>$tags]);
+				  	$this->endCache();
+				  }
+				  */
+				  ?>
+				  <?= TagsCloudWidget::widget(['tags'=>$tags]);?>
 				   </li>
 				</ul>			
 			</div>