+ [refac] generate cache config based on old configuration.

module/upgrade/config/upgradeflow.php

@@ -105,6 +105,7 @@ $config->upgrade->execFlow['20_5']        = array('functions' => 'fixWorkflowFie
 $config->upgrade->execFlow['20_6']        = array('functions' => 'processDemandFiles,processSqlbuilderTables');
 $config->upgrade->execFlow['20_7']        = array('functions' => 'upgradeMyDocSpace');
 $config->upgrade->execFlow['20_8']        = array('functions' => 'processWorkflowGroups');
+$config->upgrade->execFlow['21_1']        = array('functions' => 'processCacheConfig');
 
 if(!empty($config->isINT))
 {

module/upgrade/model.php

@@ -10451,4 +10451,21 @@ class upgradeModel extends model
             }
         }
     }
+
+    /**
+     * 根据旧的缓存配置生成新的缓存配置。
+     * Generate new cache config.
+     *
+     * @access public
+     * @return void
+     */
+    public function processCacheConfig()
+    {
+        $cache = json_decode($this->config->global->cache);
+        if(!empty($cache->dao->enable))
+        {
+            $this->loadModel('install')->enableCache();
+            $this->loadModel('setting')->deleteItems('owner=system&module=common&section=global&key=cache');
+        }
+    }
 }