Question

I added gem 'redis' to my Gemfile. Ran bundle install. Restarted the local server, then ran the hello world example in my console only to get an error. Any idea what’s wrong?

[kudo (develop)]$ rails console
Loading development environment (Rails 3.2.3)
1.9.3p125 :001 > redis = Redis.new
=> #<Redis client v3.0.2 for redis://127.0.0.1:6379/0> 
1.9.3p125 :002 > redis.set("mykey", "hello world")
Redis::CannotConnectError: Error connecting to Redis on 127.0.0.1:6379 (ECONNREFUSED)
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis/client.rb:268:in `rescue in establish_connection'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis/client.rb:263:in `establish_connection'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis/client.rb:69:in `connect'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis/client.rb:282:in `ensure_connected'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis/client.rb:173:in `block in process'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis/client.rb:248:in `logging'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis/client.rb:172:in `process'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis/client.rb:84:in `call'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis.rb:608:in `block in set'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis.rb:36:in `block in synchronize'
from /Users/pejman/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis.rb:36:in `synchronize'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/redis-3.0.2/lib/redis.rb:607:in `set'
from (irb):2
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/railties-3.2.3/lib/rails/commands/console.rb:47:in `start'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/railties-3.2.3/lib/rails/commands/console.rb:8:in `start'
from /Users/pejman/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/railties-3.2.3/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'1.9.3p125 :003 > 

Answer 1

Ended up being pretty simple.

To install redis (server) I ran (in the terminal):

brew install redis

Then in a separate terminal window, I started the server with:

redis-server

Now I’m all setup. My redis.set command works fine now in the rails console.

Here’s a good resource I found that walks through it more in depth: http://jimneath.org/2011/03/24/using-redis-with-ruby-on-rails.html