aasm after callback with argument

Question

I'm using the aasm (formerly acts_as_state_machine) gem in my rails 4 application. I have something like this on my Post model

  ...
  aasm column: :state do
    state :pending_approval, initial: true
    state :active
    state :pending_removal

    event :accept_approval, :after => Proc.new { |user| binding.pry } do
      transitions from: :pending_approval, to: :active
    end
  end
  ...

When I call @post.accept_approval!(:active, current_user) and the after callback gets triggered, in my console I can inspect what user is (that was passed into the Proc) and it's nil!

What's going on here? What is the correct way to call this transition?

why did you choose an abandoned gem? By the way transitions have no arguments generally — apneadiving, Jan 28 '14 at 21:09
The gem was just updated yesterday so I'm not sure what you mean. Also, their README indicates that this is possible — Kyle Decot, Jan 28 '14 at 21:18
@KyleDecot This seems to be a bug, as it is supposed to work. Could you please open an issue on https://github.com/aasm/aasm/issues?page=1&state=open ? I'll take care of that today. — alto, Jan 29 '14 at 08:19

score 6 · Answer 1 · answered Feb 01 '16 at 13:38

Look aasm docs in section callbacks.

...
  aasm column: :state do
    state :pending_approval, initial: true
    state :active
    state :pending_removal

    after_all_transition :log_all_events

    event :accept_approval, after: :log_approval do
      transitions from: :pending_approval, to: :active
    end
  end
  ...
  del log_all_events(user)
    logger.debug "aasm #{aasm.current_event} from #{user}"
  end

  def log_approval(user)
    logger.debug "aasm log_aproove from #{user}"
  end

You can call events with needed params:

  @post.accept_approval! current_user

score 3 · Answer 2 · answered Sep 14 '15 at 08:12

3

It works in the current version (4.3.0):

event :finish do
  before do |user|
    # do something with user
  end

  transitions from: :active, to: :finished
end

answered Sep 14 '15 at 08:12

Lucas Caton

3,027
1
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Do you call this with `post.finish(user)`? – wuliwong Apr 27 '18 at 21:05

score 1 · Answer 3 · answered Oct 12 '17 at 10:16

event :accept_approval do
  transitions from: :pending_approval, to: :active
end

post.accept_approval!{post.set_approvaler(current_user)}

block to bang method will be call after transition success, if any activerecord operation, it will be wrap into transition transaction, your can require a lock to prevent concurrency problem with option requires_lock: true.

score 0 · Answer 4 · answered Oct 13 '22 at 16:10

0

Move :after to the transitions sections, such that:

event :accept_approval do
  transitions from: :pending_approval, 
    to: :active,
    :after => Proc.new { |user| binding.pry }
end

Then call it as @post.accept_approval!(current_user)

answered Oct 13 '22 at 16:10

Elliott de Launay

1,027
13
31

aasm after callback with argument

4 Answers4