MongoDB $weeklyUpdate (September 13, 2021): Latest MongoDB Tutorials, Events, Podcasts, & Streams!
Tags: mongodb, database, news, mobile
Published: 2021-09-13 14:23:51

## 👋 Hi everyone!

Welcome to MongoDB $weeklyUpdate!

Here, you'll find the latest developer tutorials, upcoming official MongoDB events, and get a heads up on our latest Twitch streams and podcast, curated by [Adrienne Tacke](https://twitter.com/AdrienneTacke).

Enjoy!

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## 🎓 Freshest Tutorials on [DevHub](https://developer.mongodb.com/)

_Want to find the latest MongoDB tutorials and articles created for developers, by developers? Look no further than our [DevHub](https://developer.mongodb.com/)!_

### [Migrating Your iOS App's Realm Schema in Production](https://www.mongodb.com/developer/how-to/realm-schema-migration/)

[Andrew Morgan](https://twitter.com/andrewmorgan)

This tutorial will step you through updating an existing mobile app to add some new features that require changes to the schema.

### [Triggers Treats and Tricks: Cascade Document Delete Using Triggers Preimage](https://www.mongodb.com/developer/article/triggers-tricks-preimage-cass/)

[Pavel Duchovny](https://www.mongodb.com/developer/author/pavel-duchovny/)

In this article, we will show you how to use a preimage feature to perform cascading relationship deletes via a trigger - based on the deleted parent document.

### [Currency Analysis with Time Series Collections #2 — Simple Moving Average and Exponential Moving Average Calculation](https://www.mongodb.com/developer/article/time-series-candlestick-sma-ema/)

[Fuat Sungur](https://www.mongodb.com/developer/author/fuat-sungur/)

In this article, we’ll learn how the moving average can be calculated on time-series data.

### [Currency Analysis with Time Series Collections #1 — Generating Candlestick Charts Data](https://www.mongodb.com/developer/article/time-series-candlestick/)

[Fuat Sungur](https://www.mongodb.com/developer/author/fuat-sungur/)

Time series collections part 1: generating data for a candlestick chart from time-series data.

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## 📅 Official MongoDB [Events](https://live.mongodb.com/events/#/calendar)

_Attend an official MongoDB event near you (virtual for now)! Chat with MongoDB experts, learn something new, meet other developers, and win some swag!_

Sep 15 (4:00 PM GMT | Global) - [Learning with Luce - Structure your data with Schema Validation in MongoDB](https://live.mongodb.com/events/details/mongodb-mongodb-global-virtual-community-presents-learning-with-luce-structure-your-data-with-schema-validation-in-mongodb/)

Sep 17 (12:00 PM GMT | Nairobi, Kenya) - [MongoDB Community Mini Workshop in Kisumu](https://live.mongodb.com/events/details/mongodb-nairobi-kenya-presents-mongodb-community-mini-workshop-in-kisumu/)

Sep 23 (4:00 PM GMT | Global) - [6 Things Lauren Learned While Modeling Data in MongoDB](https://live.mongodb.com/events/details/mongodb-mongodb-global-virtual-community-presents-6-things-lauren-learned-while-modeling-data-in-mongodb/)

Sep 29 (3:00 PM GMT | Global) - [MongoDB Atlas mit Ansible automatisieren](https://live.mongodb.com/events/details/mongodb-dach-virtual-community-presents-mongodb-atlas-mit-ansible-automatisieren/)

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## 📺 MongoDB on [Twitch](https://www.twitch.tv/mongodb) & [YouTube](https://www.youtube.com/channel/UCK_m2976Yvbx-TyDLw7n1WA)

_We stream tech tutorials, live coding, and talk to members of our community via [Twitch](https://www.twitch.tv/mongodb) and [YouTube](https://www.youtube.com/channel/UCK_m2976Yvbx-TyDLw7n1WA). Sometimes, we even stream twice a week! Be sure to [follow us on Twitch](https://www.twitch.tv/mongodb) and [subscribe to our YouTube channel](https://www.youtube.com/channel/UCK_m2976Yvbx-TyDLw7n1WA) to be notified of every stream!_

*Latest Stream*

{% youtube jnxnhbTO2RA %}

🍿 [Follow us](https://www.twitch.tv/mongodb) on Twitch so you never miss a stream!

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## 🎙 Last Word on the [MongoDB Podcast](https://mongodb.libsyn.com/)

*Latest Episode*

{% spotify sspotify:episode:38kyw8xdKmm9n7ewHjYLBg %}

*Catch up on past episodes*:

Ep. 75 - [Speaking at Your Next Tech Conference with Sven Peters](https://open.spotify.com/episode/4IZ115BTG83rW3ErdGxgOp?si=FrGk5msnRjm319lyk50_qw&dl_branch=1)

Ep. 74 - [Thinking Diagnostically with Danny Hatcher](https://open.spotify.com/episode/2tSRNf6OxZVlElawGyxPVk?si=VpN-ZIpPRdCwXs-qTtGdHg&dl_branch=1)

Ep. 73 - [Saving Lives and Improving Fire Rescue with Tablet Command and MongoDB](https://open.spotify.com/episode/6Dx7j4H7QV77wi3o7tKazu?si=6obEtGrcSDuQgtI5GpCBcw&dl_branch=1)

(Not listening on Spotify? We got you! We're most likely on your favorite podcast network, including [Apple Podcasts](https://podcasts.apple.com/us/podcast/the-mongodb-podcast/id1500452446), [PlayerFM](https://player.fm/series/the-mongodb-podcast), [Podtail](https://podtail.com/en/podcast/the-mongodb-podcast/), and [Listen Notes](https://www.listennotes.com/podcasts/the-mongodb-podcast-mongodb-0g6fUKMDN_y/) 😊)

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## 🌍 MongoDB DevRel around the Interwebz
_Watch our team do their thang at various conferences, meetups, and podcasts around the world (virtually, for now). Also, find external articles and guest posts from our DevRel team here!_

### 📅 Upcoming Conferences

**Sep 28 - [ServerlessDays Paris](https://paris.serverlessdays.io/en/)**

![Speaker announcement card for Adrienne Tacke at ServerlessDays Paris. Happening on September 28, 2021. Talk title: Serverless Socializing: How I Built a Quick Multi-Player Serverless Game](https://pbs.twimg.com/media/E9uZaONUUAMkOOv?format=jpg&name=medium)

**Sep 29 - [DevOps World (Online)](https://www.devopsworld.com/home)**
Adrienne will be joining remotely to give her popular "Multi-Cloud Magic" talk!

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💡 These $weeklyUpdates are always posted to the [MongoDB Community Forums](https://www.mongodb.com/community/forums/) _first_! [Sign up](https://account.mongodb.com/account/register) today to always get first dibs on these $weeklyUpdates and other MongoDB announcements, interact with the MongoDB community, and help others solve MongoDB related issues!