Is a gem ready for Rails 4 or 5?

Built for Rails >= 4.1

Added explicit support for Rails 5.

since gem version 1.0.0

since gem version 1.0.0

since version 4.0.0

Supports Rails 5.1.0 and 5.2.0 since releases 5.1.0 and 5.2.0

Works for me!

See README

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from https://rubyplus.com/articles/4021-ActiveModelSerializer-Basics-in-Rails-5

Use activerecord-import 0.4.0 or higher.

source

since version 0.15.0 (https://github.com/zdennis/activerecord-import/blob/master/CHANGELOG.md#changes-in-0150)

version 0.0.1 is ready

since gem version 1.0.0

why not?

According to changelog ready from 1.2.0 https://github.com/brianhempel/active_record_union#changelog

ready from gem version 3.4.0 (source)

with the master branch

pull request for Rails 4 compatibility is closed

from gem version 0.7.5

See comment of jonty davis below

0.5.0

since version 2.4.1

since version 4.0.0

no dependency on Rails

no dependency on Rails

ok

from https://github.com/thoughtbot/administrate/pull/636

See Jason's comment below

since version 3.0.2

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from gem version 4

since gem version 4.1

from gem version 4

now working. if there are issues, provide the following in your gemfile:

gem 'authlogic', github: 'binarylogic/authlogic', ref: 'e4b2990d6282f3f7b50249b4f639631aef68b939'

Since gem version 3.6.0, see https://github.com/binarylogic/authlogic/blob/9340a93541f2fdc92c1fa569f74be9a5deed2e14/CHANGELOG.md#360-2017-04-28

master branch

since gem version 3.1

July 13th, 2015: 0.4.0 release

Support for Rails 4.2

https://github.com/straydogstudio/axlsx_rails/blob/master/CHANGELOG.md

July 26st, 2016: 0.5.0 release

Support for Rails 5