Episode 147 of Thinking Elixir. Day 1 and 2 of Livebook’s first launch week announcements, a new JsonSchema compiler named Exonerate, Ecto 3.10.0 brings changeset improvements for LiveView, the Image library can now skew and unskew images using Nx, KnockLabs released the one_and_done library for idempotent APIs, and more!

https://podcast.thinkingelixir.com/147

Changelog

15.0.0

Incompatible Changes

• Drop support for <= 2022 IDEs.

Enhancements

• Support 2023.1 IDEs.

Bug Fixes

• Ignore from preload list that doesn’t have square brackets. When trying to resolve keyword keys to from, don’t error on unknown keys if any previous key was preload as this may be a list of preloads that is missing the square brackets.
• Re-enable canary releases.
• Remove duplicate dependency on com.intellij.modules.java plugin.

Installation Instructions

The Comprehensive Guide to Creating Custom Mix Task Generators

Stop wasting hours on mundane tasks! 😩💻 Say hello to your new productivity hack: the Elixir Mix Task Generator 🚀🙌 Check out my latest blog post to learn how this ultimate task can change your workflow for the better! 💪💡

https://blackode.in/elixir-mix-task-generator-the-ultimate-tool-for-automating-repetitive-tasks-cc22be0684be

This post introduces the new data features in Livebook 0.9: fast data exploration through integration with Explorer, interactive data tables, and data transformation using the new Data Transform Smart cell.

https://news.livebook.dev/data-wrangling-with-explorer-the-power-of-rust-the-elegance-of-r—launch-week-1—day-5-1xqwCI

Anytime I need to inspect a page when testing LiveView, I reach for open_browser/2:

view |> open_browser()

It renders the current LiveView page and opens it in your browser! 🤩

Check it out in action 👉 https://youtube.com/shorts/IVW26sTeuSQ 👀

Learn how to use Livebook to build a Machine Learning app and deploy it to Hugging Face in less than 15 minutes.

https://news.livebook.dev/build-and-deploy-a-whisper-chat-app-to-hugging-face-in-15-minutes—launch-week-1—day-4-wYM0w

Discover Oban v2.15’s performance and quality-of-life improvements, including notification compression, faster node shutdown without orphaning jobs, and the query solution to a insidious Postgres issue we hunted for years.

https://github.com/sorentwo/oban/releases/tag/v2.15.0

File and image uploads in LiveView are already easy and elegant. But what if the user wants to upload an entire directory with more nested directories and files? How should we handle that? Chris McCord walks us through how that can work in LiveView.

https://fly.io/phoenix-files/phoenix-liveview-zipped-uploads/

Discover Livebook 0.9’s new security features, including Hubs for centralized secret management, notebook stamping, and a sneak peek into Livebook Teams for team collaboration.

https://news.livebook.dev/hubs-and-secret-management—launch-week-1—day-3-3tMaJ2

Explore Livebook v0.9’s enhanced Machine Learning features: new Neural Network tasks with the built-in Smart Cell, Distributed² Machine Learning in Elixir, and more.

https://news.livebook.dev/distributed2-machine-learning-notebooks-with-elixir-and-livebook—launch-week-1—day-2-1aIlaw

Episode 146 of Thinking Elixir. News includes Elixir 1.14.4 release and what’s in it, the EEF’s election is re-run and why, a new ML library Scholar was released and what it’s for, a Sobelow update, a post about building your own static site generator with Phoenix, a post creating a Slack-like app with LiveView and streams, and more!

https://podcast.thinkingelixir.com/146

Let’s explore three mocking tools you can use in Elixir — Mock, Mox, and Mimic. https://blog.appsignal.com/2023/04/11/an-introduction-to-mocking-tools-for-elixir.html

Add idempotency to your Phoenix/Plug apps with as little as one line of code using the new One and Done hex package!

• Launch blog post: https://knock.app/blog/using-one-and-done-to-power-idempotency
• Github Repo: https://github.com/knocklabs/one_and_done
• Hex Package: https://hex.pm/packages/one_and_done

Explore Livebook 0.9’s new features: deploy notebooks as user-friendly apps, star & access recent notebooks, and collapse sections.

Learn how to build and deploy your notebook as an app with Livebook.

https://news.livebook.dev/deploy-notebooks-as-apps-quality-of-life-upgrades—launch-week-1—day-1-2OTEWI

v14.0.1

Bug Fixes

• Ignore atoms at top-level when looking for docs.

• Replace TODO() in leex.reference.resolver.Assign with logger errors that include PSiElement.

• Ignore type for docs.

• Don’t look for variable use scope above EEx tags. If a variable is declared in an EEx tag then it is actually missing its declaration and cannot be resolved, so ignore its usage.

• Check if module is disposed when write action is run for syncLibraries.

• Only use Elixir SDK for mix format if it has an Erlang SDK.

• Include more lines of context for stacktraces in error reports.

• Ignore identifier when @*doc attribute isn’t quoted.

• Ignore if package virtual file is disposed before the deps can be read.

• Don’t decompile Erlang And as Elixir and.

• Ignore request_body and responses for docs.

• Check if heredoc has lines before calculating host text range for Markdown docs.

• Ignore if stubs ids can’t be found when resolving Callables.

• Ignore hexadecimal numbers at the root of the file when collecting doc comment.

• Return an empty array of primaryArguments instead of array with null operand for unary operation without operand.

• Set sinceBuild to IntelliJ IDEA 2022.3. Fixes incorrect compatibility listed with < 2022.3 when < 2022.3 support was removed in 14.0.0 with #2946.

• Use minByOrNull to protect from empty module list. This fix may not work as the line number reported in the errors is actually outside of the file. This is only a guess that minBy was what was throwing the NoSuchElement exception.

• Ignore null operands for not in primaryArguments(). Instead of including both left and right operand always and so having null operand in fixed size array return array with only non-null operands.

• Don’t allow Elixir SDK without Erlang SDK to be selected for New Project. The SDK has to be able to work for mix new.

• Ignore strings, charlists, and sigils at the top of file when looking for doc comments.

• Ignore top-level Aliases when collecting docs.

• Ignored unquote calls when injecting docs.

• Find enclosing quote when defs are inside an fn as in Phoenix Route Helpers.

• Handle binary modules when processing protocols and implementations for line markers and definition search.

• Skip unqualified no arguments calls when Ecto.Query.from arguments are being typed.

• Setting name on a call definition clause sets the name on the head instead. The JetBrains API both renames the usage references AND the original element where the rename refactoring was started, but when started on a call definition clause the functionNameElement is the def, defp, defmacro, or defmacrop and so both the name of the call was changed, but the def* was also changed to the new name. Now, if setName is called on a definition, the head is renamed instead.

• Filter out Elixir SDKs that don’t have an Erlang SDK when importing projects.

• Check Elixir SDK has Erlang SDK before running dialyzer. Notify user of configuration error instead of throwing exception when constructing mix commandline.

• Log heredoc where Markdown cannot be injected.

• Don’t inject Markdown in empty heredoc docs.

• Log if new name element type does not match old name element type.

• Replace name with relative identifier instead of identifier for qualified calls on rename.

• Keep looking for variants above if and unless if and unless used to call keepProcessing() after checking if the child calls when resolving or searching for variants, but Variants returned false always from keepProcessing().

  This stops the variant search from terminating inside of an if or unless when it wouldn’t outside of one as was reported in #2751.

• List Kernel and Kernel.SpecialForms variants inside modulars. Keep processing at end of modulars when looking for variants, which will check the implicit imports of Kernel and Kernel.SpecialForms.

• Prevent listing variants from outer module in nested module

• Log the accumulated and target usage type that cannot be folded.

• Fix reporting mix new errors as notifications

  • Don’t associate mix new errors with new project as it doesn’t have a frame, so the notification was suppressed before.
  • Strip color codes from mix new error notification.

• Validate –app is set correctly for new projects

  • If inferred from project name, make sure the name is valid application name the same as mix new does.
  • If –app is set explicitly, make sure it follows naming rules for mix new.

Another awesome LiveView helper:

⏱ liveSocket.enableLatencySim()

It lets us emulate latency to see how our LiveView responds when our users aren’t sitting close to our servers. That’s 🔥

Check it out https://youtube.com/shorts/xlLVtmVCuPw 👀

How to test your Elixir application’s reaction to a major crash.

https://paraxial.io/blog/atom-dos-impact

A quick walk through on how to analyse for meta tags on websites using Elixir.

Go read more: https://kiru.io/blog/posts/2023/analyze-meta-tags-with-elixir/

I ❤️ that LiveView comes with so many helpers to improve dev experience.

One of those is liveSocket.enableDebug() to help us inspect the payloads LiveView is sending. So nice! 🤩

👉 https://youtube.com/shorts/b8X8QoJJ1N8 👀

Elixir has a built-in Zip library that comes with OTP. This post explores how to use the zip module and asks the important question: “Is this safe to use with user provided zips?” We explore two different types of zip-based attacks and see what we learn from it.

https://fly.io/phoenix-files/can-phoenix-safely-use-the-zip-module/