update

app/Http/Controllers/Admin/OrdersController.php

@@ -99,8 +99,8 @@ class OrdersController extends CommonController
             "bed" => function ($query) {
                 $query->with(["room", "building", "area"]);
             },
-            "orderAgreements" => function ($query) {
-                $query->with('file')->orderBy("id", "desc");
+            "orderAgreementByLast" => function ($query) {
+                $query->with('file');
             }
         ])->where('status', $status)
             ->where(function ($query) use ($building_id, $area_id) {

app/Models/Orders.php

@@ -57,6 +57,11 @@ class Orders extends SoftDeletesModel
         return $this->hasMany(OrderAgreement::class, "order_id","id");
     }
 
+    public function orderAgreementByLast()
+    {
+        return $this->hasOne(OrderAgreement::class, "order_id","id")->orderBy("id", "desc");
+    }
+
     public function isOngoing()
     {
         return $this->status == self::STATUS_ONGOING;

resources/views/admin/orders/index.blade.php

@@ -88,7 +88,7 @@
                                 <td>
                                     {{ $row->serial }}
                                 </td>
-                                <td>{{isset($row->orderAgreements)?"/storage/" .$row->orderAgreements[0]:""}}</td>
+                                <td>{{isset($row->orderAgreementByLast)?"/storage/" .$row->orderAgreementByLast->file->name:""}}</td>
 
                                 <td>{{ $row->project->name }}</td>
                                 <td>{{ $row->bed->building->name }}</td>