How to set after callback for specific transition only in aasm?

Question

I have 2 events:

event :event1, after: :event2! do
  transitions to: :state2, from: :state1, guard: proc {some func}
  transitions to: :state3, from: :state1
end    

event :event2 do
  transitions to: :state3, from: state2, guard: proc {some func}
end

How can I set after callback for first transition only in event1? (I cann't replace second transition to other event)

I tried

event :event1 do
  transitions to: :state2, from: :state1, after: :event2!, guard: proc {some func}
  transitions to: :state3, from: :state1
end

But it not working

I didn't get you exactly. You need to do something after the first transition. Can you please explain it more? — Deepesh, Jul 15 '15 at 18:42
I want run event2 automaticly after event1 without changing the code all over the application. But only for 1 transition, not for all — Денис Дворяшин, Jul 15 '15 at 19:01
If you run another event just after some event then what is the use of the first event why not directly jump to the second event? — Deepesh, Jul 15 '15 at 19:09

rubyu2 · Answer 1 · 2015-08-18T14:31:06.940

I am not sure whether I got you exactly.You want run event2 only after this transition: transitions to: :state2, from: :state1, guard: proc {some func},right?

event :event1 do
  transitions to: :state2, from: :state1, :after => Proc.new {|*args| set_process(*args) } , guard: proc {some func}
  transitions to: :state3, from: :state1
end 

def set_process(name)
  event2!
end

Or try this.

event :event1 do
  transitions to: :state2, from: :state1, guard: proc {some func}
  transitions to: :state3, from: :state1
  after do
    event2! if self.state2?
  end
end    

event :event2 do
  transitions to: :state3, from: state2, guard: proc {some func}
end

This code means that, when guard returns true,it will do first transition,else it will do second one.After transition,if it's state2, it will do event2.You can find more detail at aasm.

In the event of having multiple transitions for an event, the first transition that successfully completes will stop other transitions in the same event from being processed.

You can write any code in the callback,just like rails callbacks.

How to set after callback for specific transition only in aasm?

1 Answers1