FEATURE: More digest email frequency options. Digests can be sent as often as every 30 minutes.

db/migrate/20160302170230_rename_digest_after_days_to_digest_after_minutes.rb

@@ -0,0 +1,13 @@
+class RenameDigestAfterDaysToDigestAfterMinutes < ActiveRecord::Migration
+  def up
+    rename_column :user_options, :digest_after_days, :digest_after_minutes
+    execute "UPDATE user_options SET digest_after_minutes = digest_after_minutes * 1440 WHERE digest_after_minutes IS NOT NULL"
+    execute "UPDATE site_settings SET value = value::integer * 1440 WHERE name = 'default_email_digest_frequency' AND value IS NOT NULL"
+  end
+
+  def down
+    rename_column :user_options, :digest_after_minutes, :digest_after_days
+    execute "UPDATE user_options SET digest_after_days = digest_after_days / 1440 WHERE digest_after_days IS NOT NULL"
+    execute "UPDATE site_settings SET value = value::integer / 1440 WHERE name = 'default_email_digest_frequency' AND value IS NOT NULL"
+  end
+end