CODEWITHSUNDEEP
ruby-on-rails-3.2
ejo
ejo

Reputation: 456

Rails after commit condition

In my rails model I need to call after_commit callback if and only if one of the table attributes is changed from one value to other.
This is working fine with after_update callback but I am invoking some additional tasks in the background and after_commit is the perfect one for this. Any suggestions?

Sample code 

    after_commit :call_cli, :if=> :change

    def change  
      if self.status_changed?  
        filename = '/location/res.log'              
        File.open(filename, File::WRONLY) do |file|
          file.write self.status_change_was+"\n"
        end
      end
    end

Upvotes: 1

Views: 5423

Answers (2)

Peter Ehrlich
Peter Ehrlich

Reputation: 7135

There's actually a previous changes method, which I would recommend: http://api.rubyonrails.org/classes/ActiveModel/Dirty.html#method-i-previous_changes

Upvotes: 2

ejo
ejo

Reputation: 456

Got it. Called another callback before_update and self.status_changed? value is stored in a flag as @flag = self.status_changed?
Thanks to this article - http://axonflux.com/offlining-denormalized-tasks-gotchas-with-off.
Also cheers to Dave Newton for the kind help.

Upvotes: 0

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