public function operate()
{
$nodeId = Input::get('node_id');
$operateType = Input::get('operate_type');
$userId = Auth::user()->id;
$userNode = UserNode::whereRaw("`user_id` = {$userId} and `node_id` = {$nodeId}")->get();
if ($operateType == 'follow' && empty($userNode->id)) {
$userNode = new UserNode();
$userNode->user_id = $userId;
$userNode->node_id = $nodeId;
$userNode->save();
} elseif (!empty($userNode->id)) {
$userNode->delete();
}
echo json_encode(array('errNo' => Config::get('common.err_no.success'), 'errMsg' => Config::get('common.err_msg.success')));
}
