view .svn/pristine/d7/d7746eb3e9f32d7f0749b6c62d75512963079219.svn-base @ 1080:5bd8c86cfa6a issue_540

Makes the Publication model act as an activity; overloading the default ActivitiesController#index view in the Bibliography Plugin in order to differentiate Publications from the other event types.

* Known issues:
** route to /activities is not working (only to /activity);
** publication cache needs to be implemented in the model, not in the helper;
** when a publication is added to n projects, n events are created (all with the same content).

class AllowNullPosition < ActiveRecord::Migration
  def self.up
    # removes the 'not null' constraint on position fields
    change_column :issue_statuses, :position, :integer, :default => 1, :null => true
    change_column :roles, :position, :integer, :default => 1, :null => true
    change_column :trackers, :position, :integer, :default => 1, :null => true
    change_column :boards, :position, :integer, :default => 1, :null => true
    change_column :enumerations, :position, :integer, :default => 1, :null => true
  end

  def self.down
    # nothing to do
  end
end