update

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

@@ -18,6 +18,7 @@
                             <select class="form-control mr-1" name="building_id"
                                     onchange="$(this).closest('form').submit()">
                                 @foreach($buildings as $pp)
+                                    <option value="">全部</option>
                                     <option
                                         value="{{$pp->id}}" @if($pp->id == $building_id) {{ "selected" }}@endif>{{$pp->name}}</option>
                                 @endforeach
@@ -25,8 +26,8 @@
                             <select class="form-control mr-1" name="building_id"
                                     onchange="$(this).closest('form').submit()">
                                 @foreach($areas as $pp)
-                                    <option
-                                        value="{{$pp->id}}" @if($pp->id == $area_id) {{ "selected" }}@endif>{{$pp->name}}</option>
+                                    <option value="">全部</option>
+                                    <option value="{{$pp->id}}" @if($pp->id == $area_id) {{ "selected" }}@endif>{{$pp->name}}</option>
                                 @endforeach
                             </select>
                             <select class="form-control mr-1" name="month" onchange="$(this).closest('form').submit()">