octobercms/october · error · ApplicationException

Please specify the modelClass property for reordering

Error message

Please specify the modelClass property for reordering

What it means

Error "Please specify the modelClass property for reordering" thrown in octobercms/october.

Source

Thrown at modules/backend/behaviors/ReorderController.php:187

        $this->vars['reorderShowTree'] = $this->showTree;
        $this->vars['reorderToolbarWidget'] = $this->toolbarWidget;
    }

    public function reorderRender()
    {
        return $this->reorderMakePartial('container');
    }

    public function reorderGetModel()
    {
        if ($this->model !== null) {
            return $this->model;
        }

        $modelClass = $this->getConfig('modelClass');

        if (!$modelClass) {
            throw new ApplicationException('Please specify the modelClass property for reordering');
        }

        return $this->model = new $modelClass;
    }

    /**
     * Returns the display name for a record.
     * @return string
     */
    public function reorderGetRecordName($record)
    {
        return $record->{$this->nameFrom};
    }

    /**
     * validateModel validates the supplied form model.
     */
    protected function validateModel()

View on GitHub (pinned to b608633a7e)

When it happens

Trigger: Thrown at modules/backend/behaviors/ReorderController.php:187 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of octobercms/october@b608633a7e (2026-08-21). Data as JSON: /api/errors/9f7e04cceeb6a31f. Report an issue: GitHub.