Introduces new audience object

#416

db/migrate/20140804185823_create_audiences.rb

@@ -0,0 +1,12 @@
+class CreateAudiences < ActiveRecord::Migration
+  def change
+    create_table :audiences do |t|
+      t.integer :conference_id
+      t.date :registration_start_date
+      t.date :registration_end_date
+      t.text :registration_description
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20140812065531_move_conference_registration_data_to_audience.rb

@@ -0,0 +1,27 @@
+class MoveConferenceRegistrationDataToAudience < ActiveRecord::Migration
+  class TempConference < ActiveRecord::Base
+    self.table_name = 'conferences'
+  end
+
+  class TempAudience < ActiveRecord::Base
+    self.table_name = 'audiences'
+    attr_accessible :conference_id, :registration_start_date, :registration_end_date, :registration_description
+  end
+
+  def change
+    # Move all the settings to the new object
+    TempConference.all.each do |conference|
+      unless TempAudience.exists?(conference_id: conference.id)
+        TempAudience.create(conference_id: conference.id,
+                            registration_start_date: conference.registration_start_date,
+                            registration_end_date: conference.registration_end_date,
+                            registration_description: conference.registration_description)
+      end
+    end
+
+    # Remove Columns
+    remove_column :conferences, :registration_start_date
+    remove_column :conferences, :registration_end_date
+    remove_column :conferences, :registration_description
+  end
+end