Rails%203%20In%20Action

332 CHAPTER 12 Sending email
When you run your feature again using bin/cucumber features/watching
_tickets.feature, it will complain now because there is no watch action for your
button to go to:
And I press "Stop watching this ticket"
The action 'watch' could not be found for TicketsController
You’re almost done! Defining this watch action is the last thing you have to do. This
action will add the user who visits it to a specific ticket’s watcher list if they aren’t
already watching it, or remove them if they are. To define this action you open app/
controllers/tickets_controller.rb and use the code found in the following listing.
Listing 12.11 app/controllers/tickets_controller.rb
def watch
if @ticket.watchers.exists?(current_user)
@ticket.watchers -= [current_user]
flash[:notice] = "You are no longer watching this ticket."
else
@ticket.watchers [:show,
:edit,
:update,
:destroy]
to these lines:
before_filter :find_ticket,
:only => [:show,
:edit,
:update,
:destroy,
:watch]
In this method you use exists?, which will check if the given user is in the list of watchers.
If they are, then you use watchers -= to remove a watcher from a ticket. If they
aren’t on the watchers list, you use watchers