Disallow locations from being their own parents

app/Http/Controllers/Api/LocationsController.php

@@ -148,6 +148,13 @@ class LocationsController extends Controller
     {
         $this->authorize('update', Location::class);
         $location = Location::findOrFail($id);
+
+        if ($request->input('parent_id') == $id) {
+
+            return response()->json(Helper::formatStandardApiResponse('error', null, 'A location cannot be its own parent. Please select a different parent ID.'));
+        }
+
+
         $location->fill($request->all());
 
         if ($location->save()) {

app/Http/Controllers/LocationsController.php

@@ -145,6 +145,11 @@ class LocationsController extends Controller
             return redirect()->route('locations.index')->with('error', trans('admin/locations/message.does_not_exist'));
         }
 
+        if ($request->input('parent_id') == $locationId) {
+            return redirect()->back()->withInput()->with('error', 'A location cannot be its own parent. Please select a different parent location.');
+        }
+
+
         // Update the location data
         $location->name         = $request->input('name');
         $location->parent_id    = $request->input('parent_id', null);