Howto get all state_machine events from model class?

Question

Is it possible to get all events from a model class? I want to filter a list by events.

There was a similar question on mailinglist about all transitions.

Ok, i found a previous question answering this one: http://stackoverflow.com/questions/4138437/get-list-of-state-machine-states — tonymarschall, Mar 05 '12 at 10:06
I have to correct myself. Answer on above questions gives all transitions and not the events. — tonymarschall, Mar 05 '12 at 10:18
It would probably depend on which state machine software that you're using. — Pavling, Mar 05 '12 at 21:09

score 6 · Accepted Answer · answered Mar 06 '12 at 10:17

6

Right on the github page you link to it shows the API methods for:

vehicle.state_events  # shows all the events possible from the current state

and

vehicle.state_paths.events # shows all the events for an object

answered Mar 06 '12 at 10:17

Pavling

Yes, but this is for a specific object, not the model class – tonymarschall Mar 06 '12 at 10:28
"Vehicle.new.state_events" or "Vehicle.new.state_paths.events" then... there's probably a more direct way, if you look through the API you linked, it does seem to be that each object gets an "events" collection. But I don't use that state machine, so I can't say more than that. – Pavling Mar 06 '12 at 16:25
Here are some more informations about this topic: https://github.com/pluginaweek/state_machine/issues/165 – tonymarschall Mar 07 '12 at 11:58

score 2 · Answer 2 · answered May 22 '14 at 14:05

The accepted answer for some reason takes a few seconds for me to compute. I guess this happens if you have a lot of states.

What works for me is:

Invoice.state_machines[:state].events.map(&:name)

In my case the class name is invoice and the state_machine is named state.

oma · Answer 3 · 2014-05-22T15:45:30.810

0

edit 2014: this list states, not events

This is how I did it, to only list the keys

def self.membership_states
  self.state_machines[:membership_status].states.map(&:name)
end

$ User.membership_states
> [:applied, ...

edited May 22 '14 at 15:45

answered Nov 06 '12 at 15:41

oma

The OP asked for the events, not the sates. So I guess this won't work. – Hendrik May 22 '14 at 14:07
@Hendrik, yeah, you're right, and those aren't the same :D been a while, do you think I should delete ? – oma May 22 '14 at 15:44
Nope, just keep contributing :) – Hendrik May 22 '14 at 20:55

3 Answers3