Add Twitter cards to your Rails site with metamagic

Lately I've been working on adding support for Twitter Cards to the Ztory website. Basically it's just a bunch of metatags that need to be added to your page, so that the next time you tweet with a link to your site you get something like this:

Just implemented the @twitterapi cards on @ztoryapp, let's see if they work! https://t.co/3vboLbaW0f

— Miguel Parramon (@mparramon) July 16, 2014