Difference between revisions of "Ruby on Rails"
From Tmplab
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== Gems == | == Gems == | ||
* gem install <gemname> | * gem install <gemname> | ||
| − | + | if it breaks, try to do: | |
gem install | gem install | ||
| − | + | if it still breaks, try to do: | |
irb | irb | ||
require 'rubygems' | require 'rubygems' | ||
| − | gem 'myproblemgem', '1. | + | gem 'myproblemgem', '1.0.0' |
| − | |||
| − | + | then look at the problem. | |
=== Example === | === Example === | ||
Revision as of 15:53, 20 January 2009
Fast commands
- Help yourself, use BORT for application baseline
Troubleshooting
Gems
- gem install <gemname>
if it breaks, try to do:
gem install
if it still breaks, try to do:
irb require 'rubygems' gem 'myproblemgem', '1.0.0'
then look at the problem.
Example
for example this session shows that the "echoe" gem is not installed. When running script/server:
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' script/server:3 Missing these required gems: capistrano-ext = 1.2.1 You're running: ruby 1.8.7.22 at /usr/local/bin/ruby rubygems 1.2.0 at /usr/local/lib/ruby/gems/1.8 Run `rake gems:install` to install the missing gems.
well... indeed Captistrano-ext IS installed:
$ ls -ald /usr/local/lib/ruby/gems/1.8/gems/cap* drwxr-xr-x 12 root wheel 408 Jan 20 12:11 /usr/local/lib/ruby/gems/1.8/gems/capistrano-2.5.3 drwxr-xr-x 9 root wheel 306 Jan 20 13:00 /usr/local/lib/ruby/gems/1.8/gems/capistrano-ext-1.2.1
but running the code with irb gives more details:
$ irb
>> require 'rubygems'
=> false
>> gem 'capistrano-ext', '1.2.1'
Gem::LoadError: Could not find RubyGem echoe (>= 0)
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:578:in `report_activate_error'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:134:in `activate'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:158:in `activate'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `each'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `activate'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:158:in `activate'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `each'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `activate'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:158:in `activate'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `each'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `activate'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:49:in `gem'
from (irb):2
So a simple:
# gem install echoe Successfully installed echoe-3.0.2 1 gem installed Installing ri documentation for echoe-3.0.2... Installing RDoc documentation for echoe-3.0.2...
fixed the problem... well... you get the idea: there's a broken dependency in captistrano-ext for echoe....
