修复账单如果没有附件则现实错误页面的问题

application/em/model/EmInvoice.php

@@ -117,11 +117,13 @@ class EmInvoice extends Base
         $eiu = EmInvoiceUseage::where(['invoice_id'=>$inv->invoice_id])->find();
 
         //查询抄表信息
-
-        $useage = Useage::with('photo')->get(['useage_id'=>$eiu->useage_id]);
-        if(isset($useage->photo_id) && is_int($useage->photo_id) && $useage->photo_id != 0) {
-            $receipt = Receipt::get(['id'=>$useage->photo_id ?: 0]);
-            if($receipt) $useage['photo'] = $receipt;
+        $uModel = Useage::get(['useage_id'=>$eiu->useage_id]);
+        if($uModel->cert_id != ''){
+            $useage = Useage::with('photo')->get(['useage_id'=>$eiu->useage_id]);
+            if($useage->photo_id) {
+                $receipt = Receipt::get(['id'=>$useage->photo_id]);
+                if($receipt) $useage['photo'] = $receipt;
+            }
         } else {
             $useage['photo'] = [];
         }