public static function setValue($wxUserId, $key, $value)
{
$obj = self::where('wx_user_id', $wxUserId)->where('key', $key)->first();
if (!$obj) {
$obj = new WxUserKv();
$obj->wx_user_id = $wxUserId;
$obj->key = $key;
}
$obj->value = $value;
$obj->save();
return $obj;
}
