I have made a Ruby project (not rails project) in Netbeans, and in main.rb file i have been requiring nokogiri but i am getting the following error.
<internal:lib/rubygems/custom_require>:29:in `require': no such file to load -- nokogiri (LoadError)
from <internal:lib/rubygems/custom_require>:29:in `require'
from /home/nadeem/rails_project/RubyApplication1/lib/main.rb:2:in `<main>'
I have installed nokogiri 1.5.0 and using ruby 1.9.2
Any idea?
Using bundler to manage your gem dependencies is probably a good idea because you can check if things are set up properly using bundle check if you've declared and successfully installed them.
The bundler setup routine can import many gems in the proper order, accounting for dependencies. Otherwise you will need to have at least this:
require 'rubygems'
gem 'nokogiri'
require 'nokogiri'
Make sure that the gems are installed with the same version of Ruby you're trying to run. It's easy to get mixed up when you're using rvm and have inadvertently added the gems to a different version.
Refer to this solution hope this will be helpful, Check your net bean's project properties and try to update path from there.
Require Nokogiri? No such file to load
Related
I'm trying to require the gem 'cerebrum'. I tried requiring it using the irb, and that worked, and also running the program in JRuby worked too. However, Ruby throws a LoadError.
C:/Ruby23-x64/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- cerebrum (LoadError)
from C:/Ruby23-x64/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
What am I doing wrong? Has anyone had that issue too?
You get the load error when gem is not installed. First check if this gem is installed in this ruby version using gem list cerebrum. It may be installed in your jruby that's why it didn't throw error.
After installing Ruby 2.0, I try and run my .rb file, and get this error:
/Users/Andrew/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:51:in `require': cannot load such file -- ruby-box (LoadError)
from /Users/Andrew/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:51:in `require'
from box.rb:2:in `<main>'
My code:
require "rubygems"
require "ruby-box"
Have you installed ruby-box for your new Ruby? Try running this, and trying again:
gem install ruby-box
Also note that require "rubygems" is useless and redundant (the interpreter deals with all this for you) in Ruby 1.9 and onwards.
I recommend using bundler to manage your dependencies even if it is a small project. It provides install and update tools to help mitigate these exact problems. For example, you could update all your dependencies with one command:
bundle update
The time invested learning bundler will quickly pay for itself :D
I'm having a problem using unroller. I have installed the gem and wrote this simple program to help focus on the problem i'm having:
#!/usr/bin/ruby
require 'rubygems'
require 'unroller'
Unroller::trace
def foo(p1, p2)
puts p1
puts p2
end
foo("param1", "param2")
Running the program yields:
/Library/Ruby/Gems/1.8/gems/facets-2.9.3/lib/core/facets/filetest/separator_pattern.rb:5: warning: already initialized constant SEPARATOR_PATTERN
/Library/Ruby/Gems/1.8/gems/facets-2.9.3/lib/core/facets/string/bracket.rb:3: warning: already initialized constant BRA2KET
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `gem_original_require': no such file to load -- facets/methodspace (LoadError)
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `require'
from /Library/Ruby/Gems/1.8/gems/unroller-1.0.0/lib/unroller.rb:4
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:60:in `gem_original_require'
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:60:in `require'
from ./ut:4
My ruby version is ruby 1.8.7 (2011-12-28 patchlevel 357). I also installed ruby on my Windows development box and get the same error and that ruby version is 1.9.3 so it does not appear to be related to the version of Ruby I'm on.
Anyone have any ideas?
Thanks very much in advance!
jon
This is a bug of unroller gem, described here: https://github.com/TylerRick/unroller/issues/1. unroller automatically requires the latest version of facets gem and the version 2.9 breaks it. (BTW gems should never use '>=' when loading dependencies, that's why '~>' is for.)
It's not that difficult to hotfix locally by using bundler and hardcoding facets gem to specific version before requiring unroller (so the specific facets version gets loaded instead of latest 2.9).
create Gemfile:
source 'http://rubygems.org'
gem 'facets', '2.8.4'
gem 'termios' # you're gonna need this gem too, for some reason
gem 'unroller'
run bundle install and then either run the script by bundle exec ruby test.rb or require bundler/setup in it:
require 'rubygems'
require 'bundler/setup'
require 'unroller'
...
UPDATE: or if you don't wanna deal with bundler, try this first, it could work too:
require 'rubygems'
gem 'facets', '2.8.4'
require 'unroller'
...
Given a Ruby program that uses a particular gem (e.g. term-ansicolor), how could I install the gem automatically, if required?
In other words, the program does:
require 'term/ansicolor'
and, in case the gem wasn't install previously, I would like to install it and continue the program rather than getting an error:
LoadError: no such file to load -- term/ansicolor
from (irb):1:in `require'
from (irb):1
from :0
What would be the most appropriate method to achieve that?
I've been using this pattern:
require 'rubygems'
begin
gem 'minitest'
rescue Gem::LoadError
Gem.install('minitest')
gem 'minitest'
end
require 'minitest'
Such a tool is not available. Read a detailed discussion about it here http://www.ruby-forum.com/topic/2728297
You should consider to use bundler. It's the de-facto standard way to manage dependencies in Ruby software.
Alternatively, you could build your package into a gem and put the required gem as a dependency in the gemspec. It would then get installed automatically when you install the gem.
When I 'require' the couch_potato gem, I get the following error:
LoadError: no such file to load -- json/add/rails
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:59:in `gem_original_require'
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:59:in `require'
from /Library/Ruby/Gems/1.8/gems/couch_potato-0.5.7/lib/couch_potato.rb:4
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:59:in `gem_original_require'
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:59:in `require'
from (irb):1
I'm not particularly experienced with Ruby yet so took a shotgun type approach and uninstalled all my gems, then reinstalled starting with couch_potato. The json gem is a requirement so the latest version was installed automatically. But this issue has persisted.
I thought maybe this part of rails (because 'rails' is in the error ... it seems like a long shot but as mentioned I'm very new to Ruby and not completely sure how gems work yet :)) but the install ended abruptly after the following few lines (these are the last few lines after a very long list):
Installing RDoc documentation for rack-ssl-1.3.2...
Installing RDoc documentation for rdoc-3.9.4...
Installing RDoc documentation for railties-3.1.0...
Installing RDoc documentation for bundler-1.0.18...
Installing RDoc documentation for rails-3.1.0...
file 'lib' not found
But anyway I went looking for the missing file. In the gem folder (/Library/Ruby/Gems/1.8/gems/json-1.1.9) there is 'lib' then 'json/add' which is a minor victory, but there is no 'rails' file in there.
At this point I checked my laptop ... there is an older version of 'json', but the file 'json/add/rails' does exist in that older gem.
What is my best option at this point? Is there a different version of couch_potato I should be using? Can I make couch_potato use the older json gem version?
You need to install the JSON gem.
$ gem install json
Actually, the json/add/rails file is deprecated by the JSON library
# This file used to implementations of rails custom objects for
# serialisation/deserialisation and is obsoleted now.
unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
require 'json'
end
$DEBUG and warn "required json/add/rails which is obsolete now!"
but it seems couch_potato has not been updated and the require is still in place.