Rails 4: Skip callback

Question

I have an auction and a bid object in my application, when someone presses the BID BUTTON it then calls the BID CREATE controller which created the bid, and then does some other things on the auction object:

BIDS CONTROLLER -> CREATE

@auction.endtime += @auction.auctiontimer
@auction.winner = @auction.arewinning 
@auction.save

AUCTION MODEL

before_update :set_endtime

def set_endtime
   self.endtime=self.starttime+self.auctiontimer
end

So the question is: How can C skip the "before callback" only, in this specific @auction.save

so you don't want to execute the callback if it is a new record? or does it depend on the action? — phoet, Oct 18 '13 at 12:22
possible duplicate of [How can I avoid running ActiveRecord callbacks?](http://stackoverflow.com/questions/632742/how-can-i-avoid-running-activerecord-callbacks) — phoet, Oct 18 '13 at 12:23
@phoet i've tried with that answer but i think doesn't work in rails 4 — Yassine S., Oct 18 '13 at 12:25

score 20 · Accepted Answer · answered Aug 17 '16 at 13:58

20

skip_callback is a complicated and not granular option.

I prefer to use an attr_accessor:

attr_accessor :skip_my_method, :skip_my_method_2
after_save{ my_method unless skip_my_method }
after_save{ my_method_2 unless skip_my_method_2 }

That way you can be declarative when skipping a callback:

model.create skip_my_method: true # skips my_method
model.create skip_my_method_2: true # skips my_method_2

answered Aug 17 '16 at 13:58

sites

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I've used this as well. Other methods could run into threading issues. – Dex Sep 15 '16 at 21:59
considering your approach I have tried slightly different solution which works with `rails 5`. Please check this answer http://stackoverflow.com/a/42945367/4675524 – Swaps Mar 22 '17 at 07:35
1

in what way is `skip_callback` not granular? – Toby 1 Kenobi Jun 27 '17 at 05:04

score 5 · Answer 2 · answered Jan 11 '14 at 16:16

ActiveSupport::Callbacks::ClassMethods#skip_callback is not threadsafe, it will remove callback-methods for time till it is being executed and hence and another thread at same time cannot get the callback-methods for execution.

Look at the informative post by Allerin - SAVE AN OBJECT SKIPPING CALLBACKS IN RAILS APPLICATION

score 4 · Answer 3 · answered Oct 18 '13 at 12:40

4

You can try skipping callback with skip_callback

http://www.rubydoc.info/docs/rails/4.0.0/ActiveSupport/Callbacks/ClassMethods:skip_callback

answered Oct 18 '13 at 12:40

akusy

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3

1

That's works! Here the useful post about this method: http://manuel.manuelles.nl/blog/2012/01/12/disable-rails-before-slash-after-callback/ – Stepan Zakharov Jan 13 '15 at 15:51

userxyz · Answer 4 · 2013-10-18T15:57:16.573

2

You can use update_columns See this http://edgeguides.rubyonrails.org/active_record_callbacks.html#skipping-callbacks

Is there any specific condition like when you don't have endtime then only you need to set end time if that the you can do

def set_endtime 
   if endtime.nil? 
     self.endtime=self.starttime+self.auctiontimer 
   end 
end

OR

before_update :set_endtime if: Proc.new { |obj| obj.endtime.nil? }

edited Oct 18 '13 at 15:57

answered Oct 18 '13 at 12:29

userxyz

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This is a way but skips validations, i want just to skip callbacks :) – Yassine S. Oct 18 '13 at 12:41
Is there any specific condition like when you don't have endtime then only you need to set end time if that the you can do def set_endtime if endtime.nil? self.endtime=self.starttime+self.auctiontimer end end – userxyz Oct 18 '13 at 13:26
Update my answer with example – userxyz Oct 18 '13 at 15:57
1

This is the correct answer for save/update callbacks! – jlstr Jul 30 '15 at 16:20

Rails 4: Skip callback

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