Cannot use “undefined” as a Firestore value - node.js

Question

I am trying to retrieve data from my Firestore database using node.js, I want to collect a field from one Firestore query and pass the value into another Firestore query but I keep getting this error in my logs, the first Firestore query successfully retrieves data, but my problem is passing a value to the second query
Error: Value for argument "value" is not a valid query constraint. Cannot use "undefined" as a Firestore value. If you want to ignore undefined values, enable `ignoreUndefinedProperties`. at Object.validateUserInput (/workspace/node_modules/#google-cloud/firestore/build/src/serializer.js:271:19) at validateQueryValue (/workspace/node_modules/#google-cloud/firestore/build/src/reference.js:2048:18) at CollectionReference.where (/workspace/node_modules/#google-cloud/firestore/build/src/reference.js:988:9) at step2 (/workspace/index.js:74:43) at /workspace/index.js:65:17 at QuerySnapshot.forEach (/workspace/node_modules/#google-cloud/firestore/build/src/reference.js:748:22) at updateBets (/workspace/index.js:60:22) at processTicksAndRejections (internal/process/task_queues.js:97:5)
here is my code
async function updateBets() {
var marketRef = db.collection('matches');
var snapshot = await marketRef.where('matchStatus', '==', 'FINISHED').get();
if (snapshot.empty) {
console.log('No matching documents.');
return;
}
console.log('I found documents');
snapshot.forEach(doc => {
step2();
async function step2() {
var marketRef2 = db.collection('markets');
var snapshot2 = await marketRef2.where('marketId', '==', doc.data().matchId).get();
console.log(doc2.id, '=>', doc2.data());
snapshot2.forEach(doc2 => {
console.log(doc2.id, '=>', doc2.data());
if (doc2.data().marketTitleId == 'FULL_TIME_RESULT') {
var a = doc.data().homeTeamScore;
var b = doc.data().awayTeamScore;
var winnerIndex;
if (a > b) {
winnerIndex = 0;
var resultIndex = ['WINNER', 'LOSER', 'LOSER'];
var docName = `${doc.data().matchId}` + '000' + '1';
var sfRef = db.collection('markets').doc(docName);
batch5.update(sfRef, {
results: resultIndex
});
} else if (a == b) {
winnerIndex = 1;
var docName = `${doc.data().matchId}` + '000' + '1';
var resultIndex = ['LOSER', 'WINNER', 'LOSER'];
var sfRef = db.collection('markets').doc(docName);
batch5.update(sfRef, {
results: resultIndex
});
} else if (a < b) {
winnerIndex = 2;
var docName = `${doc.data().matchId}` + '000' + '1';
var resultIndex = ['LOSER', 'LOSER', 'WINNER'];
var sfRef = db.collection('markets').doc(docName);
batch5.update(sfRef, {
results: resultIndex
});
}
}
})
}
});
batch5.commit().then(() => {
console.log("im done with results");
}).catch((err) => {
console.log('Mac! there was an error with results: ', err);
});
}

Answer 1

You could try:
const data = doc.data();
const matchId = data.matchId;
and then put matchId into query.
Also log the "matchId" variable to see the value.