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Questions tagged [uuid]

A UUID (Universally Unique IDentifier) is an identifier that is created with the intent of being, as the name suggests, universally unique.

A UUID (Universally Unique IDentifier) is an identifier that is created with the intent of being, as the name suggests, universally unique.

A UUID is a 16-octet (128-bit) number. In its canonical form, a UUID is represented by 32 hexadecimal digits, displayed in five groups separated by hyphens e.g.

5a0e8422-e29b-41d4-a716-416155440000

UUID is standardised by the Open Software Foundation (OSF) as part of the Distributed Computing Environment (DCE).

Wikipedia page for Universally Unique Identifier

See also:

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MySQL Incrementing ID/UUID Question

i'm attempting to create a table with an incremental ID. This isn't the simple id with AUTO_INCREMENT. In fact, the exact ID that i'm trying to work with is: test.script.1/person.n (where n is an incrementing number) Specifically, I have a table…
Michael
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nodejs, multer, aws S3

How do i apply uuid and date so that the filename stored in my database and the filename stored in my S3 bucket are the same? With this current implementation, the uuid and the date are always the same even if a post was made hours later. Can…
kd12345
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How to rename my originalname when using multer memoryStorage?

i am trying to rename my file originalname when using multer memoryStorage. I am using multer to upload an array of files and when i console.log(req.files) i get: { fieldname: 'images', originalname: 'snake.jpg', encoding: '7bit', mimetype:…
kd12345
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My MAC address does not match the MAC value within remotely-generated Version 1 UUID

When I create a version 1 UUID on this website, for all version 1 generations, last 48 bits are the same. I did some research and saw that it is the MAC address of the machine/host that UUID being created. However, I don't know which MAC address of…
muyustan
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What is postgres uuid_generate_v4() maximum?

I have logs table with many rows where pk is generated by uuid_generate_v4() function. What i'm curious about - is there a limit for generated uuids? Like if i will have 10.000.000.000 rows it will not able to generate unique primary key.
ZiiMakc
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Unusual case of VENDOR IDENTIFIER getting same in different devices for same app downloaded from App Store

recently I got into iOS development and I got a task of examining the application which is already in App Store . But I found something unusual ... Two different users when loging through two different devices through my application which is…
user16780334
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Mojang API get UUID of player at unix timestamp (api not working?)

Using the Mojang API to get the past UUID of a player with the given timestamp Using a GET request with this endpoint:(https://api.mojang.com/users/profiles/minecraft/coined?at=1577664000) The issue is, this is only getting the current UUID of the…
matt smith
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How to generate random UUID per group of records in postgres

HOw can i create random UUID per group of records ? for ex, how can I create random uuid per name(diff in color) in below dataset in Postgres sql ?
Imran
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Any ways of creating QR code for CoreData UUID object?

I'm trying to create qr code for UUID, but the main thing that stops me is that ways that I saw on creating qr codes require using String instead of UUID, so that's what I went for. var uuid: UUID var uuidString: {uuid} //cannot convert return…
Max Sat1l
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How to generate an empty UUID in Dart

Currently, I use the "UUID package" (UUID 2.2.2) to generate a random UUID. Uuid().v4().toString(); // -> 11c43ee8-b9d3-4e51-b73f-bd9dda66e29c Some of our data have a reference to an empty guid (C#) instead of null. Is there a way to generate…
ynnob
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iBeacon not tracking beacons in --release mode in android

We are working with ionic3 and using iBeacons library for beacons scanning. It is working fine in --debug and --prod mode but not working in --release mode for Android. No proguard is used. Below is code snippet: let beaconRegion =…
Numair
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PostgreSQL: Optimal way to store and index Unique Array field

I have user table with id as GUID and I want to create group table for users. Constraint: group table row should be unique for a set of users? Meaning if I want to create a new group previously I need to check if such a group already exists, meaning…
andnik
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jq: insert new objects while reading inputs from json file and bash stdout

I want to insert new json objects in between json objects using bash generated uuid. input json file test.json {"name":"a","type":1} {"name":"b","type":2} {"name":"c","type":3} input bash command uuidgen -r target output json {"id":…
Gabe
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Security of files containing a uuidv4 in the public URL on Google Cloud Storage

I am working on a project where I need to store files from users on a google cloud storage bucket. These files are private by default but should be readable by others, if my backend allows access to specific elements in my database, in which the…
Kevin Kreps
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How To Use UUIDs With Hibernate And MySQL(JPA /Hibernate / MySQL)

I'm encountering the following exception with hibernate: java.sql.SQLException: Incorrect string value: '\xD4BRh\xF09...' for column 'id' at row 1 I have a Java/JPA/Hibernate/MySQL based app. I want to use UUIDs for object identity. This is when…
user12564620
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