兼容普通表与峰谷表单价

application/em/controller/Useage.php

@@ -170,7 +170,7 @@ class Useage extends Base
             $uModel->last_sum_numb = $data['last_numb'];
             $uModel->last_date = $data['last_date'];
             $uModel->em_id = $data['em_id'];
-            $uModel->amount = $data['amount'] ?: 0;
+            $uModel->amount = isset($data['amount']) ? $data['amount'] : 0;
 
             //峰谷类型
             $uModel->type = $data['pricing_type'];