renamed filter fields bug

src/Traits/Filterable.php

@@ -120,7 +120,7 @@ public function getField(string $field): string
      */
     public function availableFields(): array
     {
-        if (!isset($this->filterFields)) {
+        if (!isset($this->filterFields) && !isset($this->renamedFilterFields)) {
             return array_merge($this->getTableColumns(), $this->relations());
         }
 
@@ -138,6 +138,10 @@ public function getUserDefinedFilterFields(): array
             return $this->userDefinedFilterFields;
         }
 
+        if (isset($this->renamedFilterFields)) {
+            return $this->userDefinedFilterFields = $this->renamedFilterFields;
+        }
+
         $userDefinedFilterFields = [];
 
         foreach ($this->filterFields as $key => $value) {

tests/Feature/RenameFilterableFieldsTest.php

@@ -89,4 +89,27 @@ public function it_can_overwrite_rename_filter_fields_in_eloquent_builder(): voi
         // It returns o records as builder level filters take priority
         $response->assertJsonCount(1);
     }
+
+    /** @test */
+    public function rename_filter_fields_works_when_filter_fields_not_set(): void
+    {
+        $post = new Post();
+        $post->renamedFilterFields = ['invalid_column' => 'post_title']; // invalid column name
+
+        $post->create([
+            'title' => 'title_1',
+        ])->create([
+            'title' => 'title_2',
+        ]);
+
+        Route::get('/posts', function () use ($post) {
+            // reset with valid column name
+            return $post->renamedFilterFields(['title' => 'post_title'])->filter()->get();
+        });
+
+        $response = $this->getJson('/posts?filters[post_title][$eq]=title_1');
+
+        $response->assertOk();
+        $response->assertJsonCount(1);
+    }
 }