Strange require behaviour

Ruby
1

Why does gem ‘bson_ext’ work, but require ‘bson_ext’ does not. Ruby
1.9.3. Same on Windows or Linux.

C:\irb
irb(main):001:0> require ‘bson_ext’
LoadError: cannot load such file – bson_ext
from
c:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in
require' from c:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:inrequire’
from (irb):1
from c:/Ruby193/bin/irb:12:in `’
irb(main):002:0> gem ‘bson_ext’
=> true
irb(main):003:0>

by
TheR

2

I found this about the “gem” command within IRB:

Kernel#gem
gem(gem_name, *version_requirements)

 Adds a Ruby Gem to the $LOAD_PATH. Before a Gem is loaded, its
 required Gems are loaded. If the version information is omitted,
 the highest version Gem of the supplied name is loaded. If a Gem
 is not found that meets the version requirement and/or a required
 Gem is not found, a Gem::LoadError is raised. More information on
 version requirements can be found in the Gem::Version
 documentation.

 The gem directive should be executed before any require statements
 (otherwise rubygems might select a conflicting library version).

 You can define the environment variable GEM_SKIP as a way to not
 load specified gems. you might do this to test out changes that
 haven't been intsalled yet. Example:

   GEM_SKIP=libA:libB ruby-I../libA -I../libB ./mycode.rb

 gem:                 [String or Gem::Dependency] The gem name or
                      dependency instance.

 version_requirement: [default=">= 0.0.0"] The version requirement.

 return:              [Boolean] true if the Gem is loaded,
                      otherwise false.

 raises:              [Gem::LoadError] if Gem cannot be found, is
                      listed in GEM_SKIP, or version requirement
                      not met.

–

I’d guess that you haven’t installed the gem correctly, so it isn’t in
the right location for “require” to work.

3

That certainly looks like my problem. Since I have tried reloading Ruby
Gems through RVM twice (and since RVM is supposed to be the most
reliable way of installing Ruby) how do I fix this problem?