Migrations refactored ro support data convertion

db/migrate/20130218141258_convert_closed_to_state_in_issue.rb

@@ -0,0 +1,19 @@
+class ConvertClosedToStateInIssue < ActiveRecord::Migration
+  def up
+    Issue.transaction do
+      Issue.find_each do |issue|
+        issue.state = issue.closed? ? :closed : :opened
+        issue.save
+      end
+    end
+  end
+
+  def down
+    Issue.transaction do
+      Issue.find_each do |issue|
+        issue.closed = issue.closed?
+        issue.save
+      end
+    end
+  end
+end