Allow callable defaults?

[tfausak]

Should we allow callable defaults? That way you could determine the default value at "run" time instead of "compile" time.

class Interaction < ActiveInteraction::Base
  time :the_time,
       default: Time.now
  def execute
    Time.now - the_time
  end
end
Interaction.run!
# => 0.000992851
Interaction.run!
# => 0.001622327

I'm imagining something like this:

class Interaction < ActiveInteraction::Base
  time :the_time,
       default: -> { Time.now }
end

[AaronLasseigne]

I was thinking about this exact thing the other day. This strikes me as a reasonable approach.

[tfausak]

Oh yeah, I forgot my rationale. This sucks:

class Interaction < ActiveInteraction::Base
  time :the_time,
       default: nil
  def execute
    self.time = Time.now unless time?
  end
end

[tfausak]

If we ever introduce a lambda filter, we're going to hate ourselves for this.

class Interaction < ActiveInteraction::Base
  function :a_lambda,
           default: -> { -> { 'oh god why' } }
end

[AaronLasseigne]

😆