Ensure appended attributes aren't returned in fields filter

src/Query/Scopes/Filters/Fields.php

@@ -3,6 +3,7 @@
 namespace DoubleThreeDigital\Runway\Query\Scopes\Filters;
 
 use DoubleThreeDigital\Runway\Runway;
+use Statamic\Fields\Field;
 use Statamic\Query\Scopes\Filters\Fields as BaseFieldsFilter;
 
 class Fields extends BaseFieldsFilter
@@ -18,7 +19,13 @@ protected function getFields()
     {
         $resource = Runway::findResource($this->context['resource']);
 
-        return $resource->blueprint()->fields()->all()->filter->isFilterable();
+        return $resource->blueprint()->fields()->all()
+            ->filter->isFilterable()
+            ->reject(function (Field $field) use ($resource) {
+                return in_array($field->handle(), $resource->model()->getAppends(), true)
+                    && ! $resource->model()->hasSetMutator($field->handle())
+                    && ! $resource->model()->hasAttributeSetMutator($field->handle());
+            });
     }
 
     public function apply($query, $values)