Javascript 如果值不为null/empty，则响应JS MySQL更新

我是react js的初学者，仅当密码和图像字段不是来自前端的空值时，我才尝试更新它们，但我得到以下错误：

错误：mysqld_stmt_execute的参数不正确

node.js脚本：

async updateUser(req, res) {

        const { id } = req.params;

        const {
            fullname,
            CPF,
            RG,
            born,
            email,
            phone,
            password,
            level, 
            city, 
            cityHallState } = req.body;

        let image;
        if (req.files.length > 0) {
            image = req.files[0].filename;
        } else {
            image = '';
        }

        let created = new Date();

        let date = ("0" + created.getDate()).slice(-2);
        let month = ("0" + (created.getMonth() + 1)).slice(-2);
        let year = created.getFullYear();
        let hours = created.getHours();
        let minutes = created.getMinutes();
        let seconds = created.getSeconds();

        let updatedAt = year + "-" + month + "-" + date + " " + hours + ":" + minutes + ":" + seconds;

        try {

            await conn.execute('UPDATE register SET fullname = ?, CPF = ?, RG = ?, born = ?, email = ?, phone = ?, city = ?, state = ?, password = CASE WHEN ? IS NOT NULL AND LENGTH(?) > 0 THEN ? ELSE password END, image = CASE WHEN ? IS NOT NULL AND LENGTH(?) > 0 THEN ? ELSE image END, level = ?, updated = ? WHERE id = ?',
                [fullname, CPF, RG, born, email, phone, city, cityHallState, password, image, level, updatedAt, id],
                function (err, results, fields) {

                    console.log('register errors: ' + err);
                    console.log(results);

                    if (err == null) {
                        if (results.affectedRows > 0) {
                            return res.json('user updated');
                        } else {
                            return res.json('could not update user data');
                        }
                    } else {
                        return res.json('error updating user data: ' + err);
                    }
                });
        } catch (error) {
            return res.json('could not update user data. catch error: ' + error);
        }
}

---

如果删除密码和图像字段，查询将正常执行。我做错了什么？

如果长度大于0，是否尝试将默认值设置为字符串

'password'

或

'image'

？如果是这样，您可能需要在以下内容周围加上单引号：

UPDATE register
SET fullname = ?,
    CPF = ?,
    RG = ?,
    born = ?,
    email = ?,
    phone = ?,
    city = ?,
    state = ?,
    password = CASE WHEN ? IS NOT NULL AND LENGTH(?) > 0 THEN ? ELSE 'password' END,
    image = CASE WHEN ? IS NOT NULL AND LENGTH(?) > 0 THEN ? ELSE 'image' END,
    level = ?,
    updated = ?
WHERE id = ?'

您还可以通过完全删除case语句并在javascript中为

password

和

image

设置默认值来清理查询：

async updateUser（请求、恢复）{
const{id}=req.params；
常数{
全名，
中央公积金，
RG，
出生的，
电子邮件，
电话，
密码='password'，
水平，
城市
cityHallState}=req.body；
让image='image'；
如果（req.files.length>0）{
image=req.files[0]。文件名；
}
...
试一试{
wait conn.execute（'UPDATE register SET fullname=？，CPF=？，RG=？，born=？，email=？，phone=？，city=？，state=？，password=？，image=？，level=？，updated=？其中id=？'
...

否。我希望仅当输入表单中的字段不为空/非空时才更新这些字段。用户可以选择是否填写。如果未填写，则不得更改数据库中的原始值。