nebulab/spree-subscriptions — pull request #36 by brchristian (2014-07-31 01:06:51+00:00)
Title: Shortcut for ShippedIssue#magazine_issue

Here we can write `ShippedIssue.magazine_issue` rather than always needing to write `ShippedIssue.issue.magazine_issue`, similar to the way that Spree uses `LineItem.product` as a shortcut for `LineItem.variant.product`.