Merge pull request #5503 from Laravel-Backpack/add-a-way-to-limit-ent…

…ries

Validate length parameter server side

src/app/Http/Controllers/Operations/ListOperation.php

@@ -79,6 +79,13 @@ public function search()
         $length = (int) request()->input('length');
         $search = request()->input('search');
 
+        // check if length is allowed by developer
+        if ($length && ! in_array($length, $this->crud->getPageLengthMenu()[0])) {
+            return response()->json([
+                'error' => 'Unknown page length.',
+            ], 400);
+        }
+
         // if a search term was present
         if ($search && $search['value'] ?? false) {
             // filter the results accordingly