OK. I found where the problem was. I cloned your project and fired up. Apparently your show.html.erb
page from feeds is different from the one from the article, that's why you couldn't access to entries:
If you want to see the entries first create new feed, with name and description, and for example add these links for each feed:
http://feedjira.com/blog/feed.xml
When you finish adding feeds, from your terminal in root app, run cd lib/task
and finally run: bundle exec rake sync:feeds
as it mentioned from the article:
The rake task loops through all the Feeds stored in the database and fetches the latest content for each one. From that, loop through the new Entries, creating or updating it in the database. We are updating every time to keep up with any change in the source content.
Now, if you go to this link below for example, or through link show first feed:
http://localhost:3000/feeds/1/entries
You should be able to see all entries for feed id 1.
I hope it helps.