public function rules()
{
return [
[['t_leave_date','t_days','t_reason','t_nickname','t_leave_enddate'],'required'],[['t_leave_date','safe'],[['t_days'],'number'],[['t_reason'],'string'],[['type','add_time','uid','update_time','status','is_shen'],'integer'],[['t_pickup','t_pass'],'string','max' => 20],[['t_img','reviewer_user','audit_user'],'max' => 255]
];
}