Expects and promises

[cabello]

Hi 👋

I recently found this gem https://github.com/adomokos/light-service and one thing I liked was the fact that you can specify what's expected from the context and what will be set on the context.

class LooksUpTaxPercentageAction
  extend LightService::Action
  expects :order
  promises :tax_percentage

I've been doing delegate calls to mimic the expects functionality, I have nothing for the promises.

Is that something you would welcome a PR for?

[natebird]

I think this would be a worthwhile addition. I've just added comments at the top of the class about what's required input and what is expected output. Defining it might clean up some of the boilerplate code I create like this:

    if context.location.blank? || context.calibration.blank?
      Rails.logger.info 'AddCalibrationLocation [ SKIPPED - MISSING INFO ]'
      return false
    end

[dikond]

Hey, take a look at Hanami::Interactor - it's simpler than collectiveidea's interactor (no Organizaer, callbacks, rollback) but thanks to its API you can clearly see the input and the output :)

[gee-forr]

You could also try this out: https://github.com/michaelherold/interactor-contracts

It takes what light-service does, and quite a bit further.