add include_cfp to splashpage, remove old column, migrate data

db/migrate/20141127163428_remove_column_include_cfp_in_splash_from_cfp.rb

@@ -1,5 +0,0 @@
-class RemoveColumnIncludeCfpInSplashFromCfp < ActiveRecord::Migration
-  def change
-    remove_column :call_for_papers, :include_cfp_in_splash, :boolean, default: false
-  end
-end

db/migrate/20141127163536_add_include_cfp_in_splashpages.rb

@@ -1,5 +0,0 @@
-class AddIncludeCfpInSplashpages < ActiveRecord::Migration
-  def change
-    add_column :splashpages, :include_cfp, :boolean, default: false
-  end
-end

db/migrate/20141128073306_migrate_data_remove_column_include_cfp_in_splash_add_column_include_cfp.rb

@@ -0,0 +1,46 @@
+class MigrateDataRemoveColumnIncludeCfpInSplashAddColumnIncludeCfp < ActiveRecord::Migration
+  class TempConference < ActiveRecord::Base
+    self.table_name = 'conferences'
+  end
+
+  class TempCallForPaper< ActiveRecord::Base
+    self.table_name = 'call_for_papers'
+  end
+
+  class TempSplashpage < ActiveRecord::Base
+    self.table_name = 'splashpages'
+    attr_accessible :conference_id
+  end
+
+  def up
+    add_column :splashpages, :include_cfp, :boolean, default: false
+
+    TempConference.all.each do |conference|
+      cfp = TempCallForPaper.find_by(conference_id: conference.id)
+
+      if cfp && cfp.include_cfp_in_splash
+        splashpage = TempSplashpage.find_or_initialize_by(conference_id: conference.id)
+        splashpage.include_cfp = cfp.include_cfp_in_splash # true
+        splashpage.save!
+      end
+    end
+
+    remove_column :call_for_papers, :include_cfp_in_splash, :boolean, default: false
+  end
+
+  def down
+    add_column :call_for_papers, :include_cfp_in_splash, :boolean, default: false
+
+    TempConference.all.each do |conference|
+      splashpage = TempSplashpage.find_by(conference_id: conference.id)
+      cfp = TempCallForPaper.find_by(conference_id: conference.id)
+
+      if splashpage && cfp
+        cfp.include_cfp_in_splash = splashpage.include_cfp
+        cfp.save!
+      end
+    end
+
+    remove_column :splashpages, :include_cfp, :boolean, default: false
+  end
+end