How to do a bulk update in Firestore

How to do a bulk update in Firestore

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How to do a bulk update in Firestore
Tag : java , By : Hunter
Date : November 28 2020, 03:01 PM

I think the issue was by ths following , If you have used Firebase database, writing to completely single separate locations atomically was not possible, that's why you would have to use batch writes, which means that either all of the operations succeed, or none of them are applied.
Regarding Firestore, all operations are now atomically processed. However, you can execute multiple write operations as a single batch that contains any combination of set(), update(), or delete() operations. A batch of writes completes atomically and can write to multiple documents.
WriteBatch batch = db.batch();

DocumentReference johnRef = db.collection("users").document("John");
batch.set(johnRef, new User());

DocumentReference maryRef = db.collection("users").document("Mary");
batch.update(maryRef, "Anna", 20); //Update name and age

DocumentReference alexRef = db.collection("users").document("Alex");

batch.commit().addOnCompleteListener(new OnCompleteListener<Void>() {
    public void onComplete(@NonNull Task<Void> task) {
        // ...

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Bulk insert, update if on conflict (bulk upsert) on Postgres

Tag : sql , By : Diego
Date : March 29 2020, 07:55 AM
Any of those help Turns out a special table named excluded contains the row-to-be-inserted (strange name though)
insert into USERS(
    id, username, profile_picture)
select unnest(array['12345']),
on conflict (id) do 
update set
    username = excluded.username,
    profile_picture = excluded.profile_picture;

Refreshing data in Bulk on ElasticSearch: Bulk update/removal vs indexing from scratch with alias

Tag : elasticsearch , By : Govind Bhavan
Date : March 29 2020, 07:55 AM
will help you Option 1 is clearly the least performant both in terms of memory requirements and computing needs. You'll need to 1) query all records from your primary data source, 2) query all records from Elasticsearch, 3) figure out the diff and 4) bulk update all records in Elasticsearch again. As time goes, your primary data source will always contain approximately the same number of records, but the number of records in ES will grow since you have new records in your snapshot that are not in Elasticsearch and also records that will need to be deleted from Elasticsearch, which means that step 2 above will retrieve more and more documents each time.
With option 2 you'll need to 1) query all records from your primary data source, 2) bulk index them, 3) then query Elasticsearch for the records that weren't updated and 4) bulk update them in Elasticsearch again. This is not my preference either for the same reason as for option 1, i.e. your Elasticsearch index will keep growing.

Sequelize Transaction Bulk Update followed by Bulk Create

Tag : javascript , By : Matt Croydon
Date : March 29 2020, 07:55 AM
will help you I believe you're just after promise chaining with then? The first line should return a promise - so just call then on the result:
return sequelize.transaction(function(t){
  return sequelize.Promise.each(arrToUpdate, function(itemToUpdate){
    model.update(itemToUpdate, { transaction: t })
  }).then((updateResult) => {
    return model.bulkCreate(itemsArray, { transaction: t })
  }, (err) => {
    // if update throws an error, handle it here.

Android (Firestore): Unable to add or update or set (SetOptions.merge) fields in already created document in Firestore

Tag : android , By : Patastroph
Date : March 29 2020, 07:55 AM
I hope this helps . You can add a FailureListener and it will tell you what's wrong in logcat.
db.collection("user").document(uid).set(data).addOnCompleteListener(new OnCompleteListener<Void>() {
    public void onComplete(@NonNull Task<Void> task) {
        if (task.isSuccessful()) {
            Toast.makeText(getApplicationContext(), "Data Added", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(getApplicationContext(), "There was some problem", Toast.LENGTH_SHORT).show();
.addOnFailureListener(new OnFailureListener() {
    public void onFailure(@NonNull Exception e) {
        Log.w(TAG, "Error writing document", e);

How to extract information from firestore & functions return from a firestore update trigger?

Tag : typescript , By : bjorngylling
Date : March 29 2020, 07:55 AM
hope this fix your issue If you want to log an object with JavaScript, don't call toString() on it. Just pass it directly:
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