Transactions Questions

When the user clicks a button it's going to check if the document in firestore is exists or not, if it is, then just update (increase) some value,

I can't figure out the correct call sequence to update a document inside a transaction. i'm using the firebase v1beta1 rest apis. i'm using the

I am studying how two-phase commit works across a distributed transaction. it is my understanding that in the last part of the phase the

I am using mongoose to access to my database. i need to use transactions to make an atomic insert-update. 95% of the time my transaction works

I know this question has been asked before and the firebase official documentation also suggests that both these have exactly the same effect.

I am trying to read a single field in a firestore document, increment the field by one and update the field along side two other fields in the

This is the code i am trying to run: class transactionentity { final entity entity; final documentreference<map<string,

I'm trying to register a user. the process is as follows - i first generate a hash for the user, then generate a token. assuming these 2 steps are

I have two collections: collection c1 -- doc1 -- -- name: "doc1name" -- -- position: 1 -- doc2 -- -- name: "doc2name" -- --

I am trying to update several firestore documents, based on the result of a third-party service inside a transaction. problem is, i am getting the

I try to have logic in my transaction, but it just keeps adding the data to the database and i don't know what's going wrong... the code i

I need to create a new database connection(session) to avoid an unexpected commit from a mysql procedure in my django transaction. how to set up

I am deploying on cloud functions, and getting this error error: cannot modify a writebatch that has been committed. at

I want to update and delete using transaction in firebase cloud function. but getting an error like this:

I have a node.js web app with a route that marks some entity as deleted - flipping boolean field in a database. this route returns that entity.

So i am trying to update a datetime field in cloud firestore via cloud function as follows: transaction.update(doc_ref,

In my flutter app, when a checkbox is clicked to indicate a completed task, ideally, i need that to reflect in the firestore database. there is a

According to firestore

I'm trying implement one transaction for multiple database connection in mongodb. but it's stuck in startsession(). i have two db(replica set) and

I have created a script that performs a request with firebase. since i want to avoid multiple queries on a relation at the same time, i use the

I created a function to communicate with the firestore database. first, check if there is something in the relation. if not then add something.

I'm setting up a counter for a button "submit" to count products quantity in firebase database,it should increment the quantity +1 i have

I am using firebase transaction in my real-time database to fetch the latest count but it returns null instead of the count.i don't know what i am

I'm trying to do a simple transactional 'move' of data from one table to another in dynamodb (to add indexes). here's the call i'm making, the

In the docs it is stated,

In my node.js express application, i try to make a transaction via mongoose. i successfully connect to mongodb, and try to start a transaction

Here i'm working in a chat application, i want to maintain the unread count for the recipient side. my json structre in console looks like

I want to write to two different documents at the same time so i use a firestore transaction to insure they get written

I have code similar to below: const _addevents = async(eventlist, day, transaction) => { await eventlist.foreach(event =>

In firebase real time database i have a path like this ../funds/balance with a value of 10. i have a function doing a transaction which

I have a function to make a transaction as below utils.sqltransaction = function (event, callback) { let connection =

Firebase: how to update an inventory with offline users? i have an application for agro built with flutter and firebase. the application

I wonder if it is good enough to test if the reference exists before i start a transaction on this reference? e.g: by using .once('value') and

After several q&a about the transaction mechanism i'm trying to run a transaction on a lowel node here is my data:

I have the following problems: transaction update function problem: try to decrease the current value stored at a

I am new to flutter and firestore development. i have a collection of posts. for each post i have sub-collection of feedback. feedback can

I have some changes in my requirements: not only create/request/cancel an entire offer but do some actions on offer's details:

I am deploying this code on cloud functions, getting cannot modify a writebatch that has been committed, i have tried committing after getting

I'm using firestore runtransaction method in a https cloud function (running express). what i want is ensure that if any of the read

I have read a few posts and i am familiar with how scriptsig is formatted and how to extract relevant information from it. the problem i am having

I created something similar to a subscription/like counter using firebase real-time database and firebase's cloud functions (using a

So i'm running into an annoying problem with laravel update and save. i have a model/table invoice and invoices, that

My codes are like the below. 1) php codes \db::transaction(function () use ($id,

I've been developing a web application with react. here is a short video where i'm testing a checkbox's true and false value. once i create a new

In cloud firestore transactions how can we find out if a document exists in a collection when we just know a field name and its value and not the

I'm running a very simple firestore transaction which checks for the presence of a document, before writing to it if absent. (the use case

I have code for saving user and code for sending mail, but i want to rollback if there is an error with saving or sending mail, this is my code

I'm trying to run the following piece of python3 code: import os import psycopg2 import logging # set max attempts before giving

Is there a way to manipulate the transactions api in the rtdb for "batch" writes?(we currently can't migrate to firestore) our problem is as

I was thinking of using a transaction like so to implement a kind of distributed lock: const lockid = 'mylock'; const lockref =

Every time different users post something (let's say a color) i get the color they posted, the postid, their userid, the date in secs, and how

After disconnecting the internet, the listener "no internet" is triggered. after the connection is resumed, the "no internet" function also works.

I'm trying to view the input values given to a transaction with transaction id, i could get response like resource

I'm developing a flutter app and i'm using the firebase services. i'd like to stick only to using transactions as i prefer consistency over

I have a django 1.9 application that is running a section of code where changes are made to the database based on the results of queries to

I have a little question here. this is my code: db::begintransaction(); try{ $created = new transporttypecolumn();

I am getting null pointer exceptions on my transaction template when i try to test my method that uses manual transactions. when i am running the

Using jpa optimistic locking we can control via a @version field if a database table has been updated by another transaction at the same time,

I am using transactions for db operations.. here is pseudo code: db::begintransaction(); //some logic //trait function //some

Transaction#1 operates on set of data (where clause) on which 2nd transaction do an insert, which fit to clause from 1st

I am having a nodejs program which uses sequelize to create tables and insert data based on it. now, in future we are going to have

How can i get the last inserted id i use the following code which works:

I've succeeded to create a bean managed transaction sample and it works. i set up two programs that a java program calls b c++ program, and each

Background like this: data = user.objects.get(pk=1) if data.age > 20: with transaction.atomic(): data.age -=2

Is it ok to run whole php application in a mysql transaction? is there any side effects? i mean something like this:

I have the following case: i'm iterating over my affiliate entities and for each of them i need to persist and update data

I'm trying to make a transaction with mongoose. when i'm running the code, it looks like mongoose document remembers the session even after

For example, if i run test.update_attributes prop1: 'test', prop2: 'test2' when prop1 and prop2 have

I've seen articles saying that we should try to limit the scope of transaction, e.g. instead of doing this:

I have a data source configuration class that looks as follows, with separate datasource beans for testing and non-testing

In my code the transaction is not rolling even when i have database error.... here is the code... even when insert in trial or register

I want to change the transaction isolation mode to serializable with spring annotation but i get an exception :

If i have the following code : @component public class a{ @transactional(propagation = propagation.required) public void a(){

I am reading the documentation provided by neo4j

So i have a list of it/developer tickets stored in a database via linq-to-sql. save attempts are only done at the user request, or if they say

I am sending a post to capture multiple payment gateways: a gift card(custom payment gateway) and a credit card (stripe). my stripe

I am trying to understand the utreexo technology and i've met a problem. in utreexo we have a forest of trees where every tree has 2^k leaves. we

I'm building a module for drupal 6 (what it does isn't wildly important; i've spent a long time looking for other solutions to this

I have a spring application which uses neo4j graph database and postgresql relational database. both databases support transactions. i

I have trouble getting transactions working in this unit test. the transactiontest class contains all the necessary spring configuration. it

I's just want to test the transactional annotation support by spring with spring data jpa，and spring boot. here's my controller

I am creating a subscribing and teaming! system. here is the pseudo code: $sub = sub::create($sub_data);

I have swift code where i reduce or increase an int value for certain conditions. how can i replicate this with flutter? here is my

Now, i am reading something about how a database or file system handles parallel executed transactions. and i know database and file system will

In my code, i started a transaction, and inserted some data. then i could use select to fetch the rows which i inserted just

I need to rename two tables in one atomic operation so that user will never be able to see the database in its intermediate state. i'm

My question is simple. if a user on a blockchain wants to make a transaction request, he/she will send a request to a particular url. if this url

I am trying to parse ethereum blockchain and read transactions which indicate transfer to or from the given set of addresses. the problem is that

I am trying yo implement a blockchain in python, i have already the chain code with the ability of create transactions and blocks (and all

I have the following code: $new_models = db::transaction(function () use ($supplier, $address, $addressdetail) {