Is a gem ready for Rails 4 or 5?

Rails 4: 573 ready, 37 not ready, and 436 unknown
Rails 5: 75 ready, 8 not ready, and 963 unknown

Gems not ready for Rails 4

Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
activerecord-postgres-hstore not ready

No longer needed with Rails 4 (source)

unknown almost 4 years ago
activerecord-reputation-system not ready

pull request ready

unknown about 4 years ago
activerecord-sqlserver-adapter not ready

since gem version 4.1

unknown almost 3 years ago
audited not ready

https://github.com/collectiveidea/audited/issues/152

unknown almost 4 years ago
bartt-ssl_requirement not ready

http://rubygems.org/gems/bartt-ssl_requirement

unknown over 3 years ago
better_logging not ready

references ActiveSupport::BufferedLogger

unknown over 3 years ago
cancan not ready

Maybe with the 2.0 branch or this gem it will work. This thread shows that (in general) cancan '1.6' doesn't work with rails 4 without custom workaround. See also cancancan which is a non official but well supported continuation of CanCan.

unknown over 3 years ago
db-charmer not ready

Gem not Rails 4 compatible though there is a Rails 4 branch in the repo that may be

unknown about 3 years ago
declarative_authorization not ready

Issue Rails 4 - strong parameters

unknown about 4 years ago
degu not ready unknown about 4 years ago
dj_mon not ready

Not ready:

https://github.com/akshayrawat/dj_mon#things-to-do https://github.com/akshayrawat/dj_mon/blob/master/Gemfile.lock#L75

unknown over 3 years ago
dynamic_form not ready

See Leslie's comment below

not ready

See Leslie's comment below

over 1 year ago
enumerated_attribute not ready

https://github.com/jeffp/enumerated_attribute/pull/68

unknown about 2 years ago
globalize3 not ready

https://github.com/svenfuchs/globalize3

unknown about 4 years ago
guard-test not ready

if you're using test::unit on rails 3, you'll probably need to switch to guard-minitest on rails 4, and rebuild the Guardfile.

unknown almost 4 years ago
hoptoad_notifier not ready

airbrake is the successor of hoptoad_notifier

unknown about 4 years ago
i18n_country_select not ready

uninitialized constant ActionView::Helpers::InstanceTag

unknown almost 4 years ago
jquery_datepicker not ready

See article: http://stackoverflow.com/questions/20417254/uninitialized-constant-actionviewhelpersinstancetag-nameerror-jquery-dat

The package here worked fine for me: https://github.com/foodforarabbit/jquery_datepicker/tree/636331e04a9e39e3a367af6ae548837d0b2fa20b

unknown over 2 years ago
just-datetime-picker not ready

http://www.freelancer.com/projects/Javascript-Ruby-on-Rails/make-just-datetime-picker-work.html

unknown almost 4 years ago
meta_search not ready

ransack is the official successor of meta_search

unknown about 4 years ago