view db/migrate/20090614091200_fix_messages_sticky_null.rb @ 1087:74407a04925c issue_540

* (publication.rb) - fixed the acts_as_activity query (see diff to previous commit) - not returning duplicate results any longer; added the visible scope to the publication model;
* (init.rb) - created a new public permission - view_publication.

class FixMessagesStickyNull < ActiveRecord::Migration
  def self.up
    Message.update_all('sticky = 0', 'sticky IS NULL')
  end

  def self.down
    # nothing to do
  end
end