rails: rails c doesn't start the rails console.

I am not able to load the rails console.

$ ruby -v
ruby 2.2.4p230 (2015-12-16 revision 53155) [x86_64-darwin15]
~/opensource/intranet(master)*$ rails -v
Rails 4.2.0
$ rails s
=> Booting Thin
=> Rails 4.2.0 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Thin web server (v1.6.2 codename Doc Brown)
Maximum connections set to 1024
Listening on localhost:3000, CTRL+C to stop
^CStopping ...
Exiting
$ rails c
/Users/prasad/.rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/irb/completion.rb:9:in `require': dlopen(/Users/prasad/.rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/x86_64-darwin15/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib (LoadError)
  Referenced from: /Users/prasad/.rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/x86_64-darwin15/readline.bundle
  Reason: image not found - /Users/prasad/.rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/x86_64-darwin15/readline.bundle
    from /Users/prasad/.rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/irb/completion.rb:9:in `<top (required)>'
    from /Users/prasad/.rvm/gems/ruby-2.2.4/gems/railties-4.2.0/lib/rails/commands/console.rb:3:in `require'
    from /Users/prasad/.rvm/gems/ruby-2.2.4/gems/railties-4.2.0/lib/rails/commands/console.rb:3:in `<top (required)>'
    from /Users/prasad/.rvm/gems/ruby-2.2.4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:123:in `require'
    from /Users/prasad/.rvm/gems/ruby-2.2.4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:123:in `require_command!'
    from /Users/prasad/.rvm/gems/ruby-2.2.4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:58:in `console'
    from /Users/prasad/.rvm/gems/ruby-2.2.4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /Users/prasad/.rvm/gems/ruby-2.2.4/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

Expected behaviour

Rails console should be loaded for rails c

Actual behaviour

Rails console doesnt load on rails c.

System configuration

Rails version: 4.2.0 Ruby version: 2.2.4p230 (2015-12-16 revision 53155) [x86_64-darwin15]

About this issue

Original URL
State: closed
Created 8 years ago
Reactions: 3
Comments: 44 (4 by maintainers)

Commits related to this issue

Add rb-readline gem to development requirements When I tried to run `bin/rails console` locally for the first time, I received an error about readline. Based on this comment (https://github.com/rails... — committed to neagle/gocongress by neagle 6 years ago
added readline gem -added "rb-readline" gem to ensure can open the Rails Console (using "rails console"). --fixes an issue where the Rails Console fails to open on Mac. See https://github.com/rails/r... — committed to JLSJ-rummage-sale/volunteer-time-recorder by timhdavis 6 years ago
This fixes the issue related to readline tool. https://github.com/rails/rails/issues/26658#issuecomment-255590071 — committed to bitzesty/qae by mechanicles 5 years ago

Most upvoted comments

works for me: ln -s /usr/local/opt/readline/lib/libreadline.7.0.dylib /usr/local/opt/readline/lib/libreadline.6.dylib

16/01/2019 @saxxi upd: ln -s /usr/local/opt/readline/lib/libreadline.8.0.dylib /usr/local/opt/readline/lib/libreadline.7.dylib

+974

LegaKh on Jan 16, 2019

Add ‘rb-readline’ gem to your Gemfile in development group and install it. It’s the easiest solution for silly “readline” errors. Other solutions didn’t work for me. 😦

+501

enderahmetyurt on Oct 23, 2016

Fyi @LegaKh’s solution still applies, I had to do:

ln -s /usr/local/opt/readline/lib/libreadline.8.0.dylib /usr/local/opt/readline/lib/libreadline.7.dylib

+39

saxxi on Jan 16, 2019

My case, sidekiq wouldn’t start.

ruby installed via rbenv (rbenv-build)
readline installed via brew (Homebrew)

I unwisely did a brew update which changed my readline installation to one that my ruby install was not compiled with.

My steps to correction: Note: for good measure, I rehashed rbenv rbenv rehash and started a new terminal session after just about every step.

Uninstall offending version of ruby (2.2.0): rbenv uninstall 2.2.0
Made sure homebrew had installed readline: brew install readline
Reinstall ruby (2.2.0) with brew readline linkage: RUBY_CONFIGURE_OPTS=--with-readline-dir="$(brew --prefix readline)" rbenv install 2.2.0 _More on this: https://github.com/rbenv/ruby-build/wiki_
Install bundler: gem install bundler
Install gem bundle (assumes Gemfile): bundle

+29

cmolenda on May 2, 2017

Just reinstall your current ruby version, worked for me on ruby 2.1.2

+11

cdeliens on May 19, 2017

This is not an issue related to Rails. See how to solve issues with rvm and readline. You will face this issue with any other gem which tries to use readline as well as the issue with your Ruby installation.

Thanks!

prathamesh-sonpatki on Sep 29, 2016

ln -s /usr/local/opt/readline/lib/libreadline.8.0.dylib /usr/local/opt/readline/lib/libreadline.7.dylib

romenigld on Mar 29, 2019

If you’re using rvm you can run this to reinstall the current version which worked for me 😃

rvm reinstall $(rvm current)

Also some great options to try out here: https://stackoverflow.com/questions/16756287/cannot-execute-rails-console-due-to-an-error-with-readline/16775469

ctsstc on Feb 5, 2019

gem ‘rb-readline’ as enderahmetyurt said works fine for rails console.

ringuete on Jun 8, 2017

Same issue,

ln -s /usr/local/opt/readline/lib/libreadline.8.0.dylib /usr/local/opt/readline/lib/libreadline.7.dylib

works perfectly

newtorob on May 13, 2019

works for me: ln -s /usr/local/opt/readline/lib/libreadline.7.0.dylib /usr/local/opt/readline/lib/libreadline.6.dylib

16/01/2019 @saxxi upd: ln -s /usr/local/opt/readline/lib/libreadline.8.0.dylib /usr/local/opt/readline/lib/libreadline.7.dylib

@saxxi Thank you. That worked for me as well!

WebAhmed on Feb 9, 2019

Thanks @enderahmetyurt. It definitely was the easiest solution! Mac OSX 10.12.3, Ruby-2.3.0 and Rails-5.0.1

alobban on Feb 26, 2017

I had to use @enderahmetyurt’s solution first and then create the symlink using @LegaKh’s suggestion.

jusopi on Jan 9, 2017

The same problem here. What helped in the end was:

brew upgrade readline
rvm reinstall VERSION

danieldimitrov on Jun 25, 2019

@cmolenda reinstalling Ruby is what did it for me. Homebrew must have decided to upgrade readline without me knowing, which broke Ruby. Yay development tooling!

bloudermilk on Jan 23, 2019

@enderahmetyurt give this man a beer

victorhazbun on Aug 3, 2017

Thanks @enderahmetyurt. It works!

bparanj on Dec 29, 2016

@jeffrey008 I imploded the RVM and reinstalled it.

prasadsurase on Oct 5, 2016

ln -s /usr/local/opt/readline/lib/libreadline.8.0.dylib /usr/local/opt/readline/lib/libreadline.7.dylib

Run above code and then run rails c

Then it should work.

git4ruby on Aug 3, 2020

My case, sidekiq wouldn’t start.
* `ruby` installed via `rbenv` (`rbenv-build`)

* `readline` installed via `brew` (Homebrew)
I unwisely did a brew update which changed my readline installation to one that my ruby install was not compiled with.

My steps to correction: Note: for good measure, I rehashed rbenv rbenv rehash and started a new terminal session after just about every step.
1. Uninstall offending version of ruby (2.2.0): `rbenv uninstall 2.2.0`

2. Made sure homebrew had installed readline: `brew install readline`

3. Reinstall ruby (2.2.0) with brew readline linkage: `RUBY_CONFIGURE_OPTS=--with-readline-dir="$(brew --prefix readline)" rbenv install 2.2.0`
   _More on this: https://github.com/rbenv/ruby-build/wiki_

4. Install bundler: `gem install bundler`

5. Install gem bundle (assumes Gemfile): `bundle`

This solution worked for me working with a Docker image of ruby:2.6. I wonder why I had to do that on my host machine so that my entrypoint configured as irb could work. Thanks @cmolenda.

juniorgarcia on Nov 21, 2019