Elixir and Behaviours by Ecto example

An Elixir behaviour is just a list of functions. A module that declares that it implements a particular behaviour must implement all of these functions.

I would say that behaviours are kind of interfaces from the OOP world.

So if you want to use custom types then you should implement all of these 4 functions: type, cast, load and dump. Otherwise, Elixir will throw a compilation warning.

@behaviour declares that Arc.Ecto.Definition implements Ecto.Type and then defines necessary functions.

Then you can use Arc’s custom type in your app:

That’s all for today.
Thank you for reading this post!

Related posts:

Matchbox Quotes Day 36 [2018–02–03]. “Oath” is published by Tre L. Loadholt in Scene & Heard (SNH).

One of the many problems that plenty of low-income neighborhoods have faced is gentrification. Through time and time again, many low-income families are getting evicted due to rent exponentially…

Given how pervasively political, cultural, educational, and religious institutions are built on a foundation of stereotypes and binary assumptions, it is easy to understand why people find the…