ToString changes Javascript Object to Undefined

Question

mysqlconnection.query("SELECT userID FROM users_session WHERE userSessionID = '" + SESSION_ID_ESCAPED + "'", function SelectCb (err, rows) {
if (err) {
    throw err;
}
else {
    console.log(rows[0]);
}

How do I turn row[0] into a string so that the browser can view it?

The console tells me rows[0] = {userID: 2} // This is [object Object] in any sort of transfer.

I used , var TheID = rows[0].toString // TheID is now undefined when console.log'd or sent out.

Does this answer your question? [Why does \`Object.prototype.toString\` always return \`\[object \*\]\`?](https://stackoverflow.com/questions/13151809/why-does-object-prototype-tostring-always-return-object) — Vasyl Moskalov, May 18 '22 at 10:23

Sudhir Bastakoti · Accepted Answer · 2012-08-24T05:39:23.003

7

try:

var TheID = rows[0]['userID'].toString();

edited Aug 24 '12 at 05:39

answered Aug 24 '12 at 05:26

Sudhir Bastakoti

99,167
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Are you sure that shouldn't be `rows[0]['userID'].toString();`? Or equivalently, `rows[0].userID.toString();`. – aroth Aug 24 '12 at 05:34

score 0 · Answer 2 · edited Aug 25 '12 at 05:14

0

try this..

console.log(rows[0].userID);

you will get the userID.

edited Aug 25 '12 at 05:14

Himanshu

31,810
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answered Aug 24 '12 at 05:32

Rakesh

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21

ToString changes Javascript Object to Undefined

2 Answers2