Keep It Simple (KISS coding principle)

Tute Costa

The app we maintain has a set of steps (currently two) a user may have to fill before moving on. One step is always shown, while the other can be disabled with a feature flag. We assume this list may grow, and even when it doesn’t, we know code is copied over to other parts of the codebase, so we better get it right early.

Our first implementation:

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def supported_steps
  {
    current_medications: true,
    allergies_review: Feature.enabled?(PREVISIT_ALLERGIES),
  }.select { |_step_name, enabled| enabled }.keys
end

A suggestion during code review:

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def supported_steps
  steps = [:current_medications]
  steps << :allergies_review if Feature.enabled?(PREVISIT_ALLERGIES)
  steps
end

It’s quicker to get what’s happening in the second option, and while the methods stay short, they are practically equal. Our code reviews can get lengthy so we try not to chime in when either option is fine, but I suggested the first as a simpler option (even if not easier)[1]. Let’s see why.

Using logs to power up your Rails development workflow

Mauro Otonelli

When working on Rails applications, I find tailing the development log and watching it as I navigate through pages very useful. Some of the questions that should be in the back of your mind while looking at it are:

• Am I hitting the right URL, with the proper HTTP method?
• Am I sending the right parameters? (Are they all necessary?)
• Are there any warnings/exceptions that I should handle?
• Does the ORM generate the right SQL statements?
• Is my request taking a longer time than expected?
• Am I making unnecessary 3rd party API requests?

Reporting from ephemeral containers in production

Sebastian Armano

Reporting is not a particular task of business analysts anymore. Anyone at any department, at any point in time, needs a quick report based on the latest data to validate their decisions. Having the ability to create small custom reports in a couple of minutes, and in a format that can be consumed by any analysis software is a powerful resource to have in our belt.

strong_password v0.0.7 rubygem hijacked

Tute Costa

I recently updated minor and patch versions of the gems our Rails app uses. We want to keep dependencies fresh, bugs fixed, security vulnerabilities addressed while maintaining a high chance of backward compatibility with our codebase. In all, it was 25 gems we’d upgrade.

I went line by line linking to each library’s changeset. This due diligence never reported significant surprises to me, until this time.