Adding validations to rails aasm state

Question

in state_machine I used to do

state :cancelled do
  validates_presence_of :user
end

it would automatically cancel the transition if user was not present.

How do we add similar validations to specific states in aasm?

Answer 1

I can offer 2 options:

the first:

validates_presence_of :sex, :name, :surname, if: -> { state == 'personal' }

the second

event :fill_personal do
  before do
    instance_eval do
      validates_presence_of :sex, :name, :surname
    end
  end
  transitions from: :empty, to: :personal
end