我使用以下sql命令从数据库中获取一些数据：

SELECT users.skin, users.name, users.money, users.money_bank, users.fraction_id, users.fraction_id2, users.family_id, users.online_time, ban_list.ban_from, ban_list.ban_to, ban_list.count, ban_list.datetime, ban_list.reason FROM users LEFT OUTER JOIN ban_list ON users.name = ban_list.ban_to WHERE users.social = ? LIMIT 3

响应将如下所示：
Response from sql query
现在，我创建一个Json字符串化对象，以便稍后使用以下代码：

let charackters = [];

let nameData =  row['name'].split(" ");

charackters.push({
    spawnIndex: 0,
    name: nameData[0],
    surname: nameData[1],
    level: 0,
    cash: row['money'],
    bank: row['money_bank'],
    gender: gender,
    fraction: fraction,
    family: row['family_id'],
    playedTime: row['online_time'],
    ban: {
        penalty: row['count'],
        reason: row['reason'],
        admin: row['ban_from'],
        dateOfBan: row['datetime']
    }
});

let charackterObject = {
    characters: charackters
}
  
let charackterJson = JSON.stringify(charackterObject);

我的问题是以下部分：

ban: {
    penalty: row['count'],
    reason: row['reason'],
    admin: row['ban_from'],
    dateOfBan: row['datetime']
}

只有当penalty，reason，admin，dateOfBan的值不为NULL时才应该添加。既然我不能使用if语句，我该如何存档呢？
创建if语句