Firestore云功能事务迭代

Question

我正在尝试在Cloud函数中运行事务以遍历数组以增加Cloud Firestore中用户的crowns字段。该交易目前仅适用于第一个用户，而不适用于后续用户（或DocumentReferences）

我尝试更改.runTransaction部分的回报，还尝试更改某些承诺。我使用https://firebase.google.com/docs/firestore/manage-data/transactions作为参考。

exports.crowns_job = 
functions.pubsub.topic('comments-tick').onPublish((event) => {

var uids = [];
var uids1 = [];
//var crownVal = 0;

admin.firestore().collection('winners').get().then(function(querySnapshot) {
      if (querySnapshot.size > 0) {
        // Contents of first document
        //console.log(querySnapshot.docs[0].data());
        for (i = 0; i < querySnapshot.size; i++){
            if (querySnapshot.docs[i].id != "uids"){
                uids[i] = querySnapshot.docs[i].data().uid; //new individual uids from winners
                console.log(uids)
                console.log("holyyyy" + querySnapshot.docs[i].data().uid)
            }
        }
        admin.firestore().doc('winners/uids').get().then(function(doc) {
            if (doc.exists) {
                uids1 = doc.data().uids //old uids
                console.log("uids///" + uids)
                uids.sort()
                uids1.sort()
                for (i = 0; i < uids.length; i++){
                    console.log("here")
                    console.log(`uids is ${uids[i]} and uids1 is ${uids1[i]}`)
                    if (uids[i] == uids1[i]){

                        return admin.firestore().runTransaction(function(transaction) {
                            sfDocRef = admin.firestore().doc('users/'+uids[i])
                            // This code may get re-run multiple times if there are conflicts.
                            transaction.get(sfDocRef).then(function(sfDoc) {
                                if (!sfDoc.exists) {
                                    throw "Document does not exist!";
                                }

                                var newCrowns = sfDoc.data().crowns + 1;
                                return transaction.update(sfDocRef, { crowns: newCrowns });
                            });
                        }).then(function() {
                            console.log("Transaction successfully committed!");
                        }).catch(function(error) {
                            console.log("Transaction failed: ", error);
                        });
                    }
                }   
            } else {
                // doc.data() will be undefined in this case
                console.log("No such document!");
            }
        });
        admin.firestore().doc('winners/uids').update({
            uids: uids
        });

      } else {
        console.log("No such document!");
      }
    });

console.log("This job is run every 5 minutes!");
});