Improve code

src/Concerns/Filter.php

@@ -5,6 +5,7 @@
 use DateTimeZone;
 use Illuminate\Support\{Arr, Carbon, Collection};
 use Livewire\Attributes\On;
+use PowerComponents\LivewirePowerGrid\Column;
 
 trait Filter
 {
@@ -330,19 +331,21 @@ public function addEnabledFilters(string $field, ?string $label): void
         }
     }
 
-    //@TODO REFACTOR
-    public function ____COLUMNS_FOR_QUERY_STRING(): Collection
+    public function listColumnForFilters(): Collection
     {
+        $columns = collect();
+
         collect($this->columns())
-                 ->each(function ($column) use (&$columns) {
-                     if (isset($column->dataField)) {
-                         $columns[$column->dataField] = $column->title ?? $column->dataField;
-                     }
+            ->ensure([Column::class])
+            ->each(function ($column) use (&$columns) {
+                if (isset($column->dataField)) {
+                    $columns->put($column->dataField, $column->title ?? $column->dataField);
+                }
 
-                     $columns[$column->field] = $column->title ?? $column->field;
-                 });
+                $columns->put($column->field, $column->title ?? $column->field);
+            });
 
-        return collect($columns);
+        return $columns;
     }
 
     /*
@@ -352,12 +355,12 @@ protected function powerGridQueryString(): array
     {
         $queryString = [];
 
-        $columns = $this->____COLUMNS_FOR_QUERY_STRING();
+        $columns = $this->listColumnForFilters();
 
         foreach (Arr::dot($this->filters()) as $filter) {
             $as = str($filter->field)->replace('.', '_');
 
-            if (!is_null(request()->get($as))) {
+            if (!empty(request()->get($as))) {
                 $this->addEnabledFilters($filter->field, strval($columns->get($filter->field, $filter->field)));
             }