Unable to get insertId of the last INSERT in MySQL with NodeJS - mysql

Question

I'm using MySQL with NodeJS with asyncs and awaits. I'm trying to get the last insertid from my inserted row but keep getting errors.
Here's the async function;
function makeDb( config ) {
const connection = mysql.createConnection( config ); return {
query( sql, args ) {
return util.promisify( connection.query )
.call( connection, sql, args );
},
close() {
return util.promisify( connection.end ).call( connection );
}
};
}
And here's the code which is failing on the queries;
try {
if(tag1){
row_b = await db.query( "SELECT tagid FROM tags WHERE tagname = ?", [tag1]);
const onetagid1 = row_b[0].tagid;
console.log('onetagid1 = ' + onetagid1);
if (row_b > 0){
row_c = await db.query("
INSERT INTO entitytag (tagid1, audioid) VALUES (?,?)
ON DUPLICATE KEY UPDATE tagid1 = ?" [onetagid1, audioid, onetagid1]
);
} else {
row_d = await db.query( 'INSERT IGNORE INTO tags (tagname) VALUES (?)', [tag1]);
var twotagid1 = row_d.insertId;
console.log('twotagid1 2nd = ' + twotagid1);
row_e = await db.query(
"INSERT INTO entitytag (tagid1, audioid) VALUES (?,?)
ON DUPLICATE KEY UPDATE tagid1 = ?" [twotagid1, audioid, twotagid1]
);
}
res.json('json success!');
}
}
And here's the error;
onetagid1 = 30
twotagid1 2nd = 0
ER_PARSE_ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'I' at line 1
The error is twotagid1 2nd = 0 which should not be zero.

Answer 1

I'm not sure why this works when the other didn't. But I'll post it here hoping someone will be able to spot it;
try {
if(tag1){
row_c = await db.query( "SELECT tagid FROM tags WHERE tagname = ?", [tag1]);
if (row_c.length > 0){
console.log('tag exists in database ');
const tagid1 = row_c[0].tagid;
console.log('tagid1 = ' + tagid1);
row_f = await db.query(
"INSERT INTO entitytag (tagid1, audioid) VALUES (?,?)
ON DUPLICATE KEY UPDATE tagid1 = ?", [tagid1, audioid, tagid1 ]);
} else {
console.log('tag does not exist in database ');
row_d = await db.query( 'INSERT IGNORE INTO tags (tagname) VALUES (?)', [tag1]);
const tagInsertId = row_d.insertId;
console.log('tagInsertId = ' + tagInsertId);
row_e = db.query(
'INSERT INTO entitytag (tagid1, audioid) VALUES (?,?)
ON DUPLICATE KEY UPDATE tagid1 = ?', [tagInsertId, audioid, tagInsertId ]);
}
}
console.log('success!');
res.json(tag1);
}