how fix PUT , error 500 id = undefined ReactJs NodeJs - mysql

Question

I would like to explain my problem of the day.
error 500 , id = undefined, no idea why ,
I try to post whatever you may need
how can I fix this issue?
thats is function
handleSubmit = (e, id) => {
e.preventDefault();
const userIdData = { id };
const config = {
method: "PUT",
headers: {
"Content-Type": "application/json",
},
body: JSON.stringify({userIdData, livree: new Date().toISOString().slice(11, 16)}),
};
const url = entrypoint + "/alluserpls";
fetch(url, config)
.then(res => res.json())
.then(res => {
if (res.error) {
alert(res.error);
else {
alert(`ajouté avec l'ID ${res}!`);
}
}).catch(e => {
console.error(e);
}).finally(() => this.setState({ redirect: true })); }
my routes
app.put('/api/alluserpls', (req, res, ) => {
const formData = req.body;
const userId = req.body.id;
const deleteQuery = `UPDATE alluserpls SET ? WHERE id = ${userId}`;
connection.query(deleteQuery, err => {
if (err) {
console.log(err)
res.status(500).send("Erreur lors de la modification des users");
} else {
res.sendStatus(200);
}
});
});
my button
<form onSubmit={(e) => this.handleSubmit(e, datass.id)}>
<button type="submit">PUT</button>
</form>
console.log result
errno: 1064,
sqlMessage: "You have an error in your SQL syntax; check the manual that corresponds to
your MariaDB server version for the right syntax to use near '? WHERE id = undefined' at
line 1",
sqlState: '42000',
index: 0,
sql: 'UPDATE alluserpls SET ? WHERE id = undefined'
}
PUT /api/alluserpls 500 14.354 ms - 40

Answer 1

Replace the userId line with this:
const userId = req.body.userIdData.id;
with ES6 Object Destructring:
const { id } = req.body.userIdData
Also, it'll be cleaner if you remove the formData declaration since it's not used in the route handler.