Top "Gem" questions

What is the difference between "~> 4.0.1", "4.0.1" and no version specifier in a Gemfile?

In Rails Gemfile, what are the differences between these : gem "gemname", "~> 4.0.1" and gem "gemname", "4.0.1" and gem "gemname" Also what …

ruby-on-rails ruby gem gemfile

Is Cassandra production ready for Ruby on Rails?

I'm working on a project that is considering using Cassandra as a database. We would like to eventually migrate to …

ruby-on-rails ruby-on-rails-plugins cassandra gem

How to switch between different version of gem installed?

I have three version of rack installed on local machine (rack (1.4.1, 1.3.6, 1.3.5)). For some gem (such as Cucumber), it requires a …

ruby gem cucumber rack

bundler incorrectly trying to install "development" and "test" group gems in production

I have a small web app, which uses a bunch of gems. Some of them are only used for test …

ruby-on-rails gem bundle bundler unicorn

pg_config, ruby pg, postgresql 9.0 problem after upgrade, centos 5

After upgrade postgresql 8.1 to 9.0 ive noticed issues with libraries dependency. Postgresql works fine (connection, queries). yum list postgresql* Installed Packages …

ruby postgresql gem centos5 pg

Installing linecache19 for Ruby 1.9.2 via rvm

I am having a problem with installing linecache19(dependency of ruby-debug19) for ruby 1.9.2 Here is my term output $ rvm use 1.9.2 …

gem rvm ruby-1.9.2 linecache

cap command not found

I'm using Mac OS X 10.8.2 and I installed ruby & rails with rbenv. I try to install capistrano with gem …

ruby-on-rails ruby gem capistrano

How to install rmagick gem on Windows?

How do I install rmagick gem for Windows XP? I already installed ImageMagick with the header files, and I installed …

ruby rubygems gem imagemagick rmagick

A clean minimal gem to add a simple blog to existing app?

I need an blog inside my existing app but it doesn't have to be fancy, some category's and an way …

ruby-on-rails gem blogs

Why does bundle ignore "gem 'pg'"?

Currently Working Not sure what happened. Built gemfile.lock on a linux box and moved it over. Had missing things, …

ruby-on-rails ruby gem bundler pg