修复电表子表数据无法保存的问题

application/em/controller/Em.php

@@ -214,6 +214,10 @@ class Em extends Base
 
         //保存缴费结算数据
         $emRuleModel = EmRule::order('id desc,create_time desc')->get(['em_id'=>$data['em_id']]);
+
+        //如果之前没有子表记录则插入
+        if(!$emRuleModel) $emRuleModel = new EmRule();
+
         $emRuleModel->save($data);
 
         (new Account())->createAccount($data['em_id']);