修复抄表凭证未空时，显示“未上传凭证”文字

application/em/model/Useage.php

@@ -43,8 +43,8 @@ class Useage extends Base
             ->field('ue.*')
             ->field('station.station_name')
             ->field('em.em_numb')
-            ->leftJoin(['em'],'em.id=ue.em_id')
-            ->leftJoin(['station_info'=>'station'],'station.station_id=em.station_id')
+            ->join(['em'],'em.id=ue.em_id')
+            ->join(['station_info'=>'station'],'station.station_id=em.station_id')
             ->where($map)
             ->page($Nowpage, $limits)
             ->order('ue.id desc')

application/em/view/useage/detail.html

@@ -174,9 +174,13 @@
                                         <span class="x-red">*</span>抄表凭证
                                     </label>
                                     <div class="layui-input-inline">
+                                        {if $useage.photo.src== ''}
+                                            <div style="height: 30px;line-height: 30px">未上传凭证</div>
+                                        {else /}
                                         <a href="{$useage.photo.src}" target="_blank" class="layui-btn" disabled="disabled">
                                             <i class="layui-icon">&#xe64a;</i>预览
                                         </a>
+                                        {/if}
                                     </div>
                                 </div>
                             </div>