App\Modules\Users\Controllers\Admin\Roles::update PHP Method

    public function update($id)
    {
        // Get the Role Model instance.
        $role = Role::find($id);
        if ($role === null) {
            // There is no Role with this ID.
            $status = __d('users', 'Role not found: #{0}', $id);
            return Redirect::to('admin/roles')->withStatus($status, 'danger');
        }
        // Validate the Input data.
        $input = Input::only('name', 'slug', 'description');
        $validator = $this->validate($input, $id);
        if ($validator->passes()) {
            $origName = $role->name;
            // Update the Role Model instance.
            $role->name = $input['name'];
            $role->slug = $input['slug'];
            $role->description = $input['description'];
            // Save the Role information.
            $role->save();
            // Prepare the flash message.
            $status = __d('users', 'The Role <b>{0}</b> was successfully updated.', $origName);
            return Redirect::to('admin/roles')->withStatus($status);
        }
        // Errors occurred on Validation.
        $status = $validator->errors();
        return Redirect::back()->withInput()->withStatus($status, 'danger');
    }