Getting Started With Phoenix - ElixirConf UY

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Getting Started with PHOENIX ElixirConf UY 2022

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W ORKSHOP Montevideo, UY

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W ORKSHOP

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railsgirls.com.br

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Elixir + Ruby

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Lessons Learned from Elixir Learning Paths https://www.youtube.com/watch?v=I1jUWz1RP2U https://speakerdeck.com/elainenaomi/elixir-conf-eu-lessons-learned-from-elixir-learning-paths

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Code Smells, Refatoração e Elixir https://www.youtube.com/watch?v=3-1PCurON4Q https://speakerdeck.com/elainenaomi/elixir-brasil-2020-code-smells-refactoring-e-elixir

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https://github.com/lucasvegi/Elixir-Code-Smells a scientiﬁc research about code smells in Elixir

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olá

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São Paulo / Brazil

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Software Engineer/Developer (since 2008) B.Sc. in Computer Engineering M.Sc. in Computer Science ELAINE NAOMI WATANABE twitter.com/elaine_nw speakerdeck.com/elainenaomi linkedin.com/in/elainenaomi

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The RealReal - Elixir Adoption Story youtube.com/watch?v=sTs_4T1ufLY

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The RealReal is one of the ElixirConf UY's sponsors

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therealreal.com/careers including Fully Remote opportunities

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DAY 1: WORKSHOP

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Goal: to build a web app with Phoenix

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WHAT IS A WEB FRAMEWORK?

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https://en.wikipedia.org/wiki/Web_framework Web Framework It is standard way to build and deploy web applications Automation of common activities performed in web development For example, providing libraries for database access, templating frameworks, session management, often focusing on code reuse

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WHAT IS PHOENIX?

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Phoenix Framework Web framework created in 2014 for Elixir programming language Creator: Chris McCord Latest version: 1.6.15 Released date: 2022-10-26

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Phoenix Framework Web framework created in 2014 for Elixir programming language Creator: Chris McCord Latest version: 1.6.15 Released date: 2022-10-26

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ELIXIR

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Elixir + Erlang VM Highly Scalable and Concurrent Applications

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blog.whatsapp.com/1-million-is-so-2011 ERLANG 2 million connections on a single node

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2 million connections on a single node phoenixframework.org/blog/the-road-to-2-million-websocket-connections ELIXIR

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https://web.archive.org/web/20181011093614/https://www.techworld.com/apps-wearables/how-elixir-helped-bleacher-re port-handle-8x-more-traﬃc-3653957/

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From 150 servers to 5!

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Productivity and Performance for Developers

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Convention over Conﬁguration

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Concurrency in all environments, including tests and development

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With new tools to build modern web app

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Real Time Web

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EXPECTATIONS

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Introducción a Phoenix

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our toy program for this workshop

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github.com/elainenaomi/taskify

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AGENDA

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➔ Building a landing page ➔ Adding the authentication system ➔ Creating, reading, updating, deleting user tasks ➔ Adding sub-tasks to user tasks ➔ Building the task status from sub-tasks ➔ Deploying on ﬂy.io

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SETUP

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elixir -v

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➔ Elixir 1.14.1 ➔ Erlang 24.3.4.6

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postgres -V

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mix archive.install hex phx_new

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mix phx.new -v

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TASK #001

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mix phx.new taskify

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mix phx.server

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Live Dashboard

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TASK #002

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page title new path update the content, including logo image

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TASK #003

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TASK #004

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Finally building tasks!

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logged user

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Ecto != ORM

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TASK #005

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Nested resource: tasks/:task_id/sub_tasks logged user

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TASK #006

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sub-tasks status on task list

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TASK #007

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Deploying on Fly.io

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I'm using fly.io for this toy app because of the simple setup Installing flyctl command For example, via homebrew for mac os brew install flyctl Creating an account flyctl auth signup Launching the app cd taskify fly launch Stopping the app fly scale count 0 https://fly.io/docs/hands-on/install-flyctl/ https://fly.io/docs/elixir/getting-started/

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taskify.ﬂy.dev

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Deploying with Releases

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MIX_ENV=prod mix release https://hexdocs.pm/mix/1.14.1/Mix.Tasks.Release.html

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mix phx.gen.release --docker

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build time vs runtime

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config/config.exs vs config/runtime.ex https://elixir-lang.org/getting-started/mix-otp/config-and-releases.html#configuration

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No Support to Hot Code Upgrades

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"Given most teams can use other techniques that are language agnostic to upgrade their systems, such as Blue/Green deployments, Canary deployments, Rolling deployments, and others, hot upgrades are rarely a viable option" https://hexdocs.pm/mix/1.14.1/Mix.Tasks.Release.html#module-hot-code-upgrades

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https://blog.miguelcoba.com/series/deploying-elixir

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WRAPPING UP

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➔ Introduction to Phoenix Request Life-Cycle ➔ Introduction to Phoenix generators ➔ Introduction to Ecto: migrations, Ecto schema and validations, Ecto queries ➔ Introduction to authentication with mix phx.gen.auth ➔ An overview of data integrity :) ➔ Deployment with ﬂy.io

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in 2 hours!

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REFERENCES

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https://elixirforum.com/

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ADDITIONAL REFERENCES

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https://medium.com/very-big-things Clarity | Saša Jurić | ElixirConf EU 2021 https://www.youtube.com/watch?v=6sNmJtoKDCo

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https://ulisses.dev/

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Writing extensible functional code - Renan Ranelli https://www.youtube.com/watch?v=1HXMUI7tiCQ

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SOLID Elixir • Georgina McFadyen • GOTO 2018 https://www.youtube.com/watch?v=rmftOs2BzgU

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github.com/podium/elixir-secure-coding

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github.com/podium/elixir-secure-coding

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!!Con 2019- Tail Call Optimization: The Musical!! by Anjana Vakil & Natalia Margolis https://www.youtube.com/watch?v=-PX0BV9hGZY

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https://pesquisecomelixir.com.br/

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https://github.com/lucasvegi/Elixir-Code-Smells

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O Elixir do futuro, com Charlotte Lorelei Oliveira https://pt-br.eventials.com/locaweb/o-elixir-do-futuro-com-charlotte-lorelei-oliveira/ ELIXIR

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MY CONTRIBUTIONS

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ELIXIR youtube.com/ElixirLabOrg

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ELIXIR

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ELIXIR

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CARNIVAL EDITION ELIXIR

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https://sourcelevel.io/code-review-ebook

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https://github.com/elainenaomi/taskify

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speakerdeck.com/elainenaomi elainenaomi.dev Muito obrigada illustrations from undraw.co translation: muchas gracias