Gem And/Or Ruby on Rails Broke All of a Sudden, Anyone Know What Happened

gem and/or Ruby on Rails broke all of a sudden, anyone know what happened?

I'd try cleaning out all your installed gems by running

rm -rf ~/.gems
sudo rm -rf /Library/Ruby/Gems/*

After this gem list should list no gems. Then run

sudo gem update --system

to ensure Ruby Gems is at the latest version. You'll then have to reinstall all your gems. (Probably gem install bundler followed by bundle install).

By the way, you should check out rbenv or rvm for managing Ruby versions and keeping all your development gems separate from the system Ruby.

Rails / Gem command suddenly throwing errors

My hunch was correct - RubyMine was to blame... and the user too, of course !

Far too used to using refactoring tools in Intellij for Java, I refactored some fairly common methods names in my controllers (such as changing "show" to "index") and ended up refactoring into the Ruby 1.8 standard library files too !

Need to double-check what refactoring is doing, going forward, and try to limit it just to my project and not the whole SDK :)

Gem not working after update to OS X 10.10 Yosemite Beta

I had the same issue, and solved it by deleting my Gems, and reinstalling:

sudo rm -rf /Library/Ruby/Gems/*;
sudo gem update --system

(as described
here)

twitter bootstrap drop down suddenly not working

had to move

//= require jquery

below

//= require bootstrap

within

application.js

When installing Hobo it installed a previous version of rails in my system, is it going to mess up things?

As ruralocity indicated, it's your gemfile and gemfile.lock that indicate what gems are loaded. Rvm gemsets were a godsend with rails 2, but they are not worth the hassle for rails 3.

You will have to downgrade your app to rails 3.0 if you ant to use hobo 1.3. Alternatively you can use the version of hobo from github, which works with rails 3.2. I recommend the latter. Hobo 1.4 is very stable and very close to release.

The other caveat is that while rails automatically uses gemfile.lock, other command line apps may not. Get into the habit of typing ‛bundle exec rake‛ instead of just rake.

Rails link_to syntax error: unexpected ',', expecting ')'

There is an extra-space after image_tag.

image_tag ("right_arrow.png", :size => '20x20')

It should be

image_tag("right_arrow.png", :size => '20x20')

Rails app throwing error after migrations that should not affect it

I'm a coworker of Jon's, going to answer this for posterity.

The problem was a consequence of the caching in https://github.com/rails/rails/blob/v3.0.9/activerecord/lib/active_record/base.rb; essentially @columns and @arel_table for certain model classes were out of sync because the latter was cached during app initialization and thus inherited from the master Unicorn by any new worker.

We fixed it by preventing calls to any model's ::scoped or ::unscoped during initialization where we could, and calling ::reset_column_information afterwards where we couldn't.



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