RubyMine 2017.1.3 RC (build 171.4424.48) is out now featuring support for Rails 5.1.0.
EDIT (May 23, 2017): RubyMine 2017.1.3 is now stable. Download this version from our website.
As jQuery is no longer required by default, you can choose other JS libraries, such as React and Vue.js, when creating a new Rails app right from the New Project dialog:
We have also supported
form_with that has replaced and unified
form_tag in Rails 5.1:
As for other improvements, the Ruby code formatter now aligns assignments correctly regardless of the presence of code comments.
See the release notes for the full list of improvements.
Your RubyMine Team