Is a gem ready for Rails 4 or 5?

Rails 4: 615 ready, 38 not ready, and 433 unknown
Rails 5: 163 ready, 11 not ready, and 912 unknown

Gems ready for Rails 4

Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
compass-rails ready

since gem version 1.1.2

unknown over 5 years ago
composite_primary_keys ready

https://github.com/composite-primary-keys/composite_primary_keys/pull/154#issuecomment-19411500

unknown about 6 years ago
connection_pool ready

Not dependent on Rails

ready

Not dependent on Rails

8 months ago
copycat ready

gem 'copycat', github: 'Zorros/copycat', branch: 'rails-4' - this one works

unknown over 5 years ago
couchrest_model ready

since 2.0.0.beta3

unknown about 6 years ago
country_select ready

https://github.com/stefanpenner/country_select/commit/b7a47862d16a2bd7c1cb0029b82771fe76ac7c65

Minor hiccups with the latest stable version (1.1.3) such as inability to properly add custom css classes.

However 2.0beta working just fine

unknown over 5 years ago
country-select ready

see Tomas' comment

unknown over 5 years ago
crummy ready

see this commit

unknown about 6 years ago
cucumber ready

Rails 4 ready gem cucumber-rails depends on it.

unknown over 5 years ago
cucumber-rails ready

from gem version 1.4.0

unknown about 6 years ago
daemons ready

Does not depend on Rails.

unknown about 6 years ago
dalli ready

-

ready

5.2 from v2.7.8, 5.0 from v2.7.6

8 months ago
database_cleaner ready

since gem version 1.0.0 (source)

ready

since version 1.5.2

about 3 years ago
date_format ready

Worked fine with Rails 3 and Rails 4. Visit the link for further details : http://rpatil.github.io/date-format/

unknown over 4 years ago
db_leftovers ready

I'm the author and am using it production on Rails 4 sites.

unknown over 5 years ago
debugger ready

Does not depend on Rails.

unknown about 6 years ago
decent_exposure ready unknown about 6 years ago
default_value_for ready

since gem version 3.0.0

ready

since gem version 3.0.2

about 3 years ago
delayed_job ready

probably at least with gem version 4.0.0.beta2

unknown about 6 years ago
delayed_job_active_record ready

with the master branch? (source)

unknown about 6 years ago