CODEWITHSUNDEEP
postgresqlruby-on-rails-3.2
alex.iz
alex.iz

Reputation: 41

Rails 3.2 + pg gem : load path issue

I have two rails applications, "old" one and new one, created with

    $ rails new blog -d postgresql

when i try to start the server, it works on "old" application without problems:

    $ rails s -p 2000
    => Booting WEBrick
    => Rails 3.2.8 application starting in development on http://0.0.0.0:2000
    => Call with -d to detach
    => Ctrl-C to shutdown server
    [2012-09-17 16:28:48] INFO  WEBrick 1.3.1
    [2012-09-17 16:28:48] INFO  ruby 1.9.3 (2012-04-20) [x86_64-linux]
    [2012-09-17 16:28:48] INFO  WEBrick::HTTPServer#start: pid=9377 port=2000

but it fails for "new" application :/

    $ rails s -p 2000
    /usr/local/share/gems/gems/pg-0.14.1/lib/pg.rb:4:in `require': cannot load such file -- pg_ext (LoadError)
    from /usr/local/share/gems/gems/pg-0.14.1/lib/pg.rb:4:in `<top (required)>'
    from /usr/local/share/gems/gems/bundler-1.1.5/lib/bundler/runtime.rb:68:in `require'
    from /usr/local/share/gems/gems/bundler-1.1.5/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
    from /usr/local/share/gems/gems/bundler-1.1.5/lib/bundler/runtime.rb:66:in `each'
    from /usr/local/share/gems/gems/bundler-1.1.5/lib/bundler/runtime.rb:66:in `block in require'
    from /usr/local/share/gems/gems/bundler-1.1.5/lib/bundler/runtime.rb:55:in `each'
    from /usr/local/share/gems/gems/bundler-1.1.5/lib/bundler/runtime.rb:55:in `require'
    from /usr/local/share/gems/gems/bundler-1.1.5/lib/bundler.rb:119:in `require'
    from /home/alex/tmp/RoR/blog/config/application.rb:7:in `<top (required)>'
    from /usr/local/share/gems/gems/railties-3.2.8/lib/rails/commands.rb:53:in `require'
    from /usr/local/share/gems/gems/railties-3.2.8/lib/rails/commands.rb:53:in `block in <top (required)>'
    from /usr/local/share/gems/gems/railties-3.2.8/lib/rails/commands.rb:50:in `tap'
    from /usr/local/share/gems/gems/railties-3.2.8/lib/rails/commands.rb:50:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

it's possible to fix if i copy or symlink pg_ext.so to module path:

    # ln -s /usr/local/share/gems/gems/pg-0.14.1/ext/pg_ext.so /usr/local/share/gems/gems/pg-0.14.1/lib

or i can directly add requirement to boot.rb:

    require 'rubygems'
    require 'pg'

But it's not acceptable solution and i'm wondering why it works for first application and why it doesn't work for new one ? I've spent all day comparing config files but had no success.

Upvotes: 2

Views: 457

Answers (1)

user2026764
user2026764

Reputation: 11

I had the same problem after upgrading to Fedora 18.

pg_ext is built when running gem update.

A pre-requisite for that is that postgresql-devel is installed.

Upvotes: 1

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