fix Dao 缓存清除问题

@@ -27,7 +27,9 @@ class Quick extends Connection
         if ($this->_cacheStatus === true) {
             if (!empty($this->_cacheTagName) && !empty($this->_cacheKey)) {
                 $this->dbCache()->tag($this->_cacheTagName)->delete($this->_cacheKey);
-            } else {
+            } elseif (!empty($this->_cacheTagName)) {
+                $this->dbCache()->delete($this->_cacheTagName);
+            } elseif (!empty($this->_cacheKey)) {
                 $this->dbCache()->delete($this->_cacheKey);
             }
             $this->_resetParameter();
@@ -220,7 +222,7 @@ class Quick extends Connection
 
     /**
      * db cache 对象
-     * @return /Hood\Cache\CacheInterface
+     * @return \Hood\Cache\CacheInterface
      */
     private function dbCache()
     {