Posts in English

Deploying Elixir applications with Edeliver

We’ve been talking about deploy and releases with Elixir lately, like how to run migrations on top of a release or how to deal with environment variables. Now it’s time to discover another tool that can help us release our Elixir application. After practicing deploy and tracing through nodes with Exrm, we got more comfortable … »

Beyond Functional Programming with Elixir and Erlang

I would like to add a slightly different perspective to functional programming in the Erlang VM: functional programming is not a goal in the Erlang VM. It is a means to an end. When designing the Erlang language and the Erlang VM, Joe, Mike and Robert did not aim to implement a functional programming language, … »

How to config environment variables with Elixir and Exrm

It’s very common (and highly recommended) that application keeps its configuration values separated from its version control. A way of doing this is by using ENV vars (environment variables). They’re being used for improvements mostly on maintainability. The 12-factor app manifesto explains it on its Configuration section: The twelve-factor app stores config in environment variables … »

Keeping your Ruby on Rails app easy to update

The Rails 5 release candidate is out, bringing new improvements that will make your life as a developer easier. Probably you are excited to update your application to the new major Rails release, but you may have some concerns. It is normal, updating your application to fit the new version may bring an unknown number … »

Tracing and observing your remote node

Today we will continue exploring techniques for debugging and tracing Elixir code that are so important for running and understanding production systems. In the past, we have discussed: how to debug your application how to trace systems with Erlyberly how to use the observer to introspect applications. The examples above always connected to systems running … »

Ecto’s insert_all and schemaless queries

One of the functions added to Ecto 2.0 is Ecto.Repo.insert_all/3. insert_all allows developers to insert multiple entries at once into a repository: MyApp.Repo.insert_all(Post, [[title: “hello”, body: “world”], [title: “another”, body: “post”]]) Although insert_all is just a regular Elixir function, it plays an important role in Ecto 2.0 goals. To understand more about these goals, let’s … »