Load mongo fail

ruby-talk
1

Hi

I have installed mongo gem firstly, but when I require 'mongo' it get failed:

irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> require 'mongo'
NameError: uninitialized constant Mongo
        from ./mongo.rb:5
        from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in
`gem_original_require'
        from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in
`require'
        from (irb):2

This is my ruby and gem version:

$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [x86_64-linux]
$ gem -v
1.8.10

Please help, thank you.

2

You're using an old version of Ruby that leaves the current directory in the
load path. This means that when you type `require "mongo"`, it is not
requiring the mongo gem, instead it is requiring your local file. Look at
the first line of the backtrace "from ./mongo.rb:5" The path to that file is
./mongo.rb, it's in your current directory. Obviously that file references
`Mongo` on line 5, probably expecting that you'd already required the gem.

···

On Mon, Aug 29, 2011 at 2:45 AM, zuerrong <zuerrong@gmail.com> wrote:

Hi

I have installed mongo gem firstly, but when I require 'mongo' it get
failed:

irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> require 'mongo'
NameError: uninitialized constant Mongo
       from ./mongo.rb:5
       from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in
`gem_original_require'
       from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in
`require'
       from (irb):2

This is my ruby and gem version:

$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [x86_64-linux]
$ gem -v
1.8.10

Please help, thank you.

3

Oh thank you, that's really the problem.
I have a ruby file named "mongo.rb" in the current dir, so irb try
load that file firstly.
Thanks for the point.

Regards.

···

2011/8/29 Josh Cheek <josh.cheek@gmail.com>:

On Mon, Aug 29, 2011 at 2:45 AM, zuerrong <zuerrong@gmail.com> wrote:

Hi

I have installed mongo gem firstly, but when I require 'mongo' it get
failed:

irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> require 'mongo'
NameError: uninitialized constant Mongo
from ./mongo.rb:5
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in
`gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in
`require'
from (irb):2

This is my ruby and gem version:

$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [x86_64-linux]
$ gem -v
1.8.10

Please help, thank you.

You're using an old version of Ruby that leaves the current directory in the
load path. This means that when you type `require "mongo"`, it is not
requiring the mongo gem, instead it is requiring your local file. Look at
the first line of the backtrace "from ./mongo.rb:5" The path to that file is
./mongo.rb, it's in your current directory. Obviously that file references
`Mongo` on line 5, probably expecting that you'd already required the gem.