pastbedti.me » Ruby http://www.pastbedti.me About ruby, rails, postgresql and stuff.... Wed, 01 Jun 2011 20:09:49 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Change PATH environment with Rails and Capistrano http://www.pastbedti.me/2011/06/change-path-environment-with-rails-and-capistrano/ http://www.pastbedti.me/2011/06/change-path-environment-with-rails-and-capistrano/#comments Wed, 01 Jun 2011 20:09:49 +0000 Mathias Stjernström http://www.pastbedti.me/?p=699 Note to self.

When deploying my RubyOnRails applications with Capistrano and I get errors like this one

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servers: ["app.myserver.com"]
[app.myserver.com] executing command
** [out :: app.myserver.com] sh: bundle: command not found
command finished in 31ms
servers: ["app.myserver.com"]    [app.myserver.com] executing command ** [out :: app.myserver.com] sh: bundle: command not found    command finished in 31ms

Capistrano executes the commands in a very basic shell so the $PATH environment are not the same as when you login through SSH.

One way to solve this is by setting PermitUserEnvironment to yes in /etc/sshd_config and then add the correct PATH to ~/.ssh/environment

I just found another way that was much easier :-)

In you config/deploy.rb add the following snippet

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set :default_environment, {
  'PATH' => "/opt/ruby-enterprise/bin/:$PATH"
}

Thats it!

Cheers!

]]> http://www.pastbedti.me/2011/06/change-path-environment-with-rails-and-capistrano/feed/ 1 Nokogiri quote http://www.pastbedti.me/2010/04/nokogiri-quote/ http://www.pastbedti.me/2010/04/nokogiri-quote/#comments Fri, 02 Apr 2010 20:12:14 +0000 Mathias Stjernström http://www.pastbedti.me/?p=665 I just have to share this funny quote from the nokogiri website (for those of you that does not know 鋸 it’s a reeeeeeeeaaally good and fast HTML, XML, SAX, and Reader parser).

XML is like violence – if it doesn’t solve your problems, you are not using enough of it. – http://nokogiri.org/

Cheers!

]]> http://www.pastbedti.me/2010/04/nokogiri-quote/feed/ 0 Deploying a Sinatra app with Apache and Phusion Passenger a.k.a. mod_rack http://www.pastbedti.me/2009/11/deploying-a-sinatra-app-with-apache-and-phusion-passenger-a-k-a-mod_rack/ http://www.pastbedti.me/2009/11/deploying-a-sinatra-app-with-apache-and-phusion-passenger-a-k-a-mod_rack/#comments Mon, 30 Nov 2009 22:01:30 +0000 Mathias Stjernström http://www.pastbedti.me/?p=610 My Sinatra + Apache + Passenger setup did not just run :)

Deploying a simple Sinatra rack application under Apache and Phusion Passenger turned out not work out of the box for me.

I already had a virtual host so I decided to deploy with passengers sub URI (sub URI documentation).

To make this work you’ll need Apache installed with Phusion Passenger setup (Passenger installation)

This is what I started with

This is my folders for the already existing website.

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# Existing homedir
/home/my_web/
# Current webroot
/home/my_web/htdocs

Creating folders and files for Sinatra

The first thing you want to do is to create folders and files for Sinatra.

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mkdir /home/my_web/sinatra
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cd /home/my_web/sinatra
mkdir tmp
mkdir logs
mkdir public
touch app.rb
touch config.ru

Create symlink

Create a symbolic link from our current webroot to the new Sinatra app so that apache/passenger can find it.

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ln -s /home/my_web/sinatra/public /home/my_web/htdocs/app

Creating the application

We also need a Sinatra application for this to work so lets fill those files.

File: config.ru

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require 'app'

set :environment, ENV['RACK_ENV'].to_sym
set :app_file,     'app.rb'
disable :run

log = File.new("logs/sinatra.log", "a")
STDOUT.reopen(log)
STDERR.reopen(log)

run Sinatra::Application

File: app.rb

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require 'rubygems'
require 'sinatra'

before do
  # Strip the last / from the path
  request.env['PATH_INFO'].gsub!(/\/$/, '')
end

get '' do
   "Hello world"
end

Apache configuration

Now we need to setup apache so that it can find our Sinatra app and load it.

The only thing you need to do is add the following line to your existing VirtualHost block:

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RackBaseURI /app

This line will tell passenger to look into our existing webroot for a symlink thats named app and which points to our rack app. (RackBaseURI documentation)

Virtual host entry

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<VirtualHost *:80>
  ServerName www.example.com
  ServerAlias example.com
  DocumentRoot /home/my_web/htdocs/
  RackBaseURI /app

  <Directory "/home/my_web/htdocs/">
    Order allow,deny
    Allow from all
    AllowOverride All
  </Directory>
</VirtualHost>

The best part is that you are allowed to specify this option multiple times. So you can easily setup multiple apps under the same virtual host.

Cheers!

]]> http://www.pastbedti.me/2009/11/deploying-a-sinatra-app-with-apache-and-phusion-passenger-a-k-a-mod_rack/feed/ 0 Grouping a timestamp field by date in Ruby On Rails / PostgreSQL http://www.pastbedti.me/2009/11/grouping-a-timestamp-field-by-date-in-ruby-on-rails-postgresql/ http://www.pastbedti.me/2009/11/grouping-a-timestamp-field-by-date-in-ruby-on-rails-postgresql/#comments Sun, 08 Nov 2009 00:55:09 +0000 Mathias Stjernström http://www.pastbedti.me/?p=563 Recently I’ve been working a lot with dates and tonight I had a hard time finding information about how to group a model by date when the model only have a timestamp column.

Lets pretend we have a user model with a created_at attribute which is stored as a timestamp.

If we want to plot a simple graph showing signups per date this is the way to extract them:

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User.count(:group => "DATE(created_at)")

Thats all there is to it. From this you will get an OrderedHash containing the date and count of users for each date.

One small thing to remember if you are using PostgreSQL. You will need the DATE() function in any ORDER/SELECT statements because PostgreSQL will only select/order by fields thats in the GROUP BY statement and this is a pretty healthy behavior that many databases (no names here) don’t care about. Think about it. If you are grouping all users by date and use * as selector how would the database know which username or email address to display?

This is what happens if you try to group by created_at without DATE() ->

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>> User.count(:order => 'created_at DESC', :group => ["DATE(created_at)"])                                                
ActiveRecord::StatementInvalid: PGError: ERROR:  column "users.created_at" must appear in the GROUP BY clause or be used in an aggregate function
: SELECT count(*) AS count_all, DATE(created_at) AS date_created_at FROM "users"  GROUP BY DATE(created_at)  ORDER BY created_at DESC
        from /tmp/app/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb:212:in `log'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:507:in `execute'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:985:in `select_raw'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:972:in `select'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:7:in `select_all_without_query_cache'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:62:in `select_all'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/calculations.rb:255:in `execute_grouped_calculation'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/calculations.rb:132:in `calculate'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/calculations.rb:130:in `catch'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/calculations.rb:130:in `calculate'
        from /tmp/app/vendor/rails/activerecord/lib/active_record/calculations.rb:48:in `count'
        from (irb):18

And this is the right way to do it:

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>> User.count(:order => 'DATE(created_at) DESC', :group => ["DATE(created_at)"])
=> #<OrderedHash {"2009-10-14"=>22, "2009-10-25"=>4, "2009-11-04"=>8, "2009-10-15"=>9, "2009-10-26"=>16, "2009-11-05"=>9, "2009-10-16"=>193, "2009-10-27"=>14, "2009-11-06"=>9, "2009-10-17"=>49, "2009-10-28"=>15, "2009-11-07"=>6, "2009-10-18"=>36, "2009-10-29"=>8, "2009-10-19"=>116, "2009-10-30"=>15>

As you may notice the Hash does not look ordered. But if you loop over it you will get them in order:

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>> User.count(:order => 'DATE(created_at) DESC', :group => ["DATE(created_at)"]).each {|u| puts "#{u[0]} -> #{u[1]}" }
2009-11-07 -> 6
2009-11-06 -> 9
2009-11-05 -> 9
2009-11-04 -> 8
2009-11-03 -> 14
2009-11-02 -> 20
2009-11-01 -> 10
2009-10-31 -> 6
2009-10-30 -> 15
2009-10-29 -> 8
..

And thats how you group a timestamp field with just its date part.

Cheers!

]]> http://www.pastbedti.me/2009/11/grouping-a-timestamp-field-by-date-in-ruby-on-rails-postgresql/feed/ 3 How to compile VIM under OS X http://www.pastbedti.me/2009/01/how-to-compile-vim-under-os-x/ http://www.pastbedti.me/2009/01/how-to-compile-vim-under-os-x/#comments Sun, 11 Jan 2009 09:53:31 +0000 Mathias Stjernström http://www.pastbedti.me/?p=367 Configure and compiling VIM under OS X did not work out-of-the box for me. I did not want to use MacPorts VIM as it’s dependent on ruby (if you like me want that) and I did not find a way of compiling MacPorts VIM against my local ruby.

This post is about how to get VIM compiling on OS X/intel without the use of MacPorts.

1. Configure without specifying architecture

When running configure without specifying architecture everything looks fine but when you run make you get this nice little error.

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./configure --enable-rubyinterp --enable-multibyte --with-features=huge
... stripped output ...
make

Undefined symbols for architecture ppc:
  "_main", referenced from:
      start in crt1.10.5.o
ld: symbol(s) not found for architecture ppc
collect2: ld returned 1 exit status
lipo: can't open input file: /var/folders/os/osNwawQ0Hreve7NDQEugQ++++TI/-Tmp-//ccD17Dx3.out (No such file or directory)
make[1]: *** [Vim] Error 1
make: *** [first] Error 2

I did not do any Sherlock holmes work to understand this message as I do not need PPC support. I learned that there is a flag called ‘–with-mac-arch‘.

2. configure with specifying architecture

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> ./configure --with-mac-arch=intel --enable-rubyinterp --enable-multibyte --with-features=huge

checking --with-tlib argument... empty: automatic terminal library selection
checking for tgetent in -lncurses... (cached) yes
ncurses library is not usable
checking for tgetent in -ltermlib... no
checking for tgetent in -ltermcap... no
checking for tgetent in -lcurses... no
no terminal library found
checking for tgetent()... configure: error: NOT FOUND!
      You need to install a terminal library; for example ncurses.
      Or specify the name of the library with --with-tlib.

But as you can see specifying architecture did not even make is trough configure. I tried to specifying –with-tlib and adding LIBS path did not help. I did spend quite some time on this step to solve this one, but no luck here.

3. The working solution.

This became the working solution for me. Not that pretty but it did work :)

Run ./configure without arch flags.

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./configure --enable-rubyinterp --enable-multibyte --with-features=huge

When done, edit src/auto/config.mk and remove PPC arch.
And yes! I know editing src/auto/config.mk is not that good and that the file is getting overwritten every time you run configure

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> vim src/auto/config.mk

on Line 26

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  LDFLAGS   = -L. -arch ppc -arch i386  -L/usr/local/lib

Remove the PPC part “-arch ppc”
After removing PPC you can run:

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sudo make install

I hope this can save someone else some time and i hope this is one of many to come blog posts that involves VIM!

Cheers!

]]> http://www.pastbedti.me/2009/01/how-to-compile-vim-under-os-x/feed/ 4 New version of capistrano_colors released. http://www.pastbedti.me/2009/01/new-version-of-capistrano_colors-released/ http://www.pastbedti.me/2009/01/new-version-of-capistrano_colors-released/#comments Sun, 04 Jan 2009 15:36:40 +0000 Mathias Stjernström http://www.pastbedti.me/?p=328 Just released a new version of capistrano_colors. This is a total rewrite from the last version. This post show some of the bigger changes.

The biggest/coolest changes:

  • You can write your own custom machers and colorize rows that’s special for you.
  • I found a pretty neat way of making capistrano_colors system wide.
  • You can hide rows that you do not care for

I do not want to bore you more so I’ll just skip to an example ;)

If you have not already, install capistrano_colors (v.0.5.0)

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   sudo gem install capistrano_colors

The following commands can go into deploy.rb or ~/.caprc depending if you want cc for a single project or system wide.

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   require 'capistrano_colors'

   capistrano_color_matchers = [
     { :match => /command finished/,       :color => :hide,      :prio => 10 },
     { :match => /executing command/,      :color => :blue,      :prio => 10, :attribute => :underscore },
     { :match => /^transaction: commit$/,  :color => :magenta,   :prio => 10, :attribute => :blink },
     { :match => /git/,                    :color => :white,     :prio => 20, :attribute => :reverse },
   ]

   colorize( capistrano_color_matchers )

The only mandatory options are :match, :colors and :prio.

A fast description of the options:

  • :match – A regular expression of the row to match.
  • :color – The color we want on the matching rows.
  • :prio – What prio should this rule have (higher = more prio)
  • :attribute – Special effect (:underline, :reverse, :blink)
  • :level – Specify if this matcher should be bound to some of capistranos log levels (info,debug,…)

    • A more detailed description can be found at http://github.com/stjernstrom/capistrano_colors/tree/master

    As this is a rewrite I would love some feedback.

    Thanks!

    ]]>     http://www.pastbedti.me/2009/01/new-version-of-capistrano_colors-released/feed/ 0     Ruby enterprise edition (REE) on Gentoo failed and some performance experience. http://www.pastbedti.me/2008/12/ruby-enterprise-edition-ree-on-gentoo-failed-and-some-performance-experience/ http://www.pastbedti.me/2008/12/ruby-enterprise-edition-ree-on-gentoo-failed-and-some-performance-experience/#comments Mon, 15 Dec 2008 20:44:36 +0000 Mathias Stjernström http://www.pastbedti.me/?p=280 Today I got the chance to give Ruby Enterprise Edition a try. We are currently working with a really fun new environment and you do not get better opportunities to try new stuff as when you have a complete new environment thats not in production. So we gave REE a shoot. When compiling REE with got in trouble really fast and this post is about the quick fix to solve it and some of our early performance results.

    The installation of REE is nothing more that unpacking ruby-enterprise-1.8.6-20081205.tar.gz and the run the installer.

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    tar xzvf ruby-enterprise-1.8.6-20081205.tar.gz

    And after that we run

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    ./ruby-enterprise-1.8.6-20081205/installer

    This is when our problems started.

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    chmod -R g+r,o+r,o-w /opt/ruby-enterprise-1.8.6-20081205/lib/ruby
    --------------------------------------------
    Installing RubyGems...
    /opt/ruby-enterprise-1.8.6-20081205/bin/ruby setup.rb --no-ri --no-rdoc
    /opt/ruby-enterprise-1.8.6-20081205/bin/ruby: no such file to load -- auto_gem (LoadError)
    *** Cannot install RubyGems

    This one took some time to find but first I could not understand why auto_gem was not found and also why it tried to load auto_gem when the installation of rubygems is not done.

    After a few minutes of thinking and digging i found my environment variable RUBYOPT which was set to -rauto_gem.

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    This one makes rubygems to autoload when you run something in ruby. I already had this line because i had ruby/rubygems installed before we installed REE. I still want this enviroment but not during the installation so i disabled it by starting the installer like this:

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    Passing the environment variable before the command just sets it for this command.

    If you do want this change permanent some digging in /etc found there is no less that 3 files where this variable is set (depending of shells).

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    grep -R "RUBYOPT" *
    csh.env:setenv RUBYOPT '-rauto_gem'
    env.d/10rubygems:RUBYOPT="-rauto_gem"
    profile.env:export RUBYOPT='-rauto_gem'

    After changing this variable everything worked as expected!

    So far our experience with REE is great. With plain old ruby we where running about 15 passenger (mod_rails) instances and we where using around 1.6GB memory. After The ruby enterprise upgrade we are now using 26 instances with only 1.7GB memory. CPU loads when stressing seems to be 50% less with REE and pages load times are much more stable.

    You have to take these measurements with a bit of salt because we only had around an hour of testing but they seem pretty impressive so far.

    I will get back with more performance data as we play.

    Cheers!

    ]]>     http://www.pastbedti.me/2008/12/ruby-enterprise-edition-ree-on-gentoo-failed-and-some-performance-experience/feed/ 9     The developers behind Newsdesk have a weblog! http://www.pastbedti.me/2008/11/the-developers-behind-newsdesk-have-a-weblog/ http://www.pastbedti.me/2008/11/the-developers-behind-newsdesk-have-a-weblog/#comments Tue, 25 Nov 2008 19:21:21 +0000 Mathias Stjernström http://www.pastbedti.me/?p=236 Finally my friends at newsdesk have a blog. They have started off real good with a comparison of three ruby wrappers for Google charts.

    I have great expectations from the newsdesk developers blog. If you are a Ruby and Rails developer you should definitely keep and eye on them!

    ]]>     http://www.pastbedti.me/2008/11/the-developers-behind-newsdesk-have-a-weblog/feed/ 0     Merb 1.0 and Empty reply from server http://www.pastbedti.me/2008/11/merb-10-and-empty-reply-from-server/ http://www.pastbedti.me/2008/11/merb-10-and-empty-reply-from-server/#comments Sun, 16 Nov 2008 13:51:03 +0000 Mathias Stjernström http://www.pastbedti.me/?p=161 Yesterday I upgraded merb to 1.0 and I got in some trouble that I solved pretty fast. Last night I started an empty application an got trouble again, but this time for real. I did a fresh install (removed all merb gems and datamapper gems). I generated a fresh merb app with merb-gen but i could not get it to work and all i got from merb was empty replies.

    In this post I will try to describe the steps I took to track the problem down and how I solved it.

    (I don’t care about this long post so just take me to the solution)

    How i generated the app (on a fresh merb install)

    Instruction from http://wiki.merbivore.com/howto/gettingstarted/firstapp

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    > merb-gen app testapp
    > cd testapp
    > merb-gen resource article title:string,content:text
    > rake db:automigrate
    > merb
    Loading init file from /Users/mathias/Documents/Dev/merb/testapp/config/init.rb
    Loading /Users/mathias/Documents/Dev/merb/testapp/config/environments/development.rb
     ~ Connecting to database...
     ~ Loaded slice 'MerbAuthSlicePassword' ...
     ~ Parent pid: 1239
     ~ Compiling routes...
     ~ Activating slice 'MerbAuthSlicePassword' ...
    merb : worker (port 4000) ~ Starting Mongrel at port 4000
    merb : worker (port 4000) ~ Successfully bound to port 4000

    Respons from merb

    When i point the browser to http://localhost:4000/articles I get the following in the browser

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    Safari can’t open the page “http://localhost:4000/articles/”.
    The error was: “Operation could not be completed. (kCFErrorDomainCFNetwork error 302.)” (kCFErrorDomainCFNetwork:302)
    Please choose Report Bugs to Apple from the Safari menu, note the error number, and describe what you did before you saw this message.

    Testing the same url with curl i get

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    > curl http://localhost:4000/articles
    curl: (52) Empty reply from server

    And the only thing i see in the console is the following. No error, no nothing.

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    merb : worker (port 4000) ~ Started request handling: Sat Nov 15 20:39:57 +0100 2008
    merb : worker (port 4000) ~ Routed to: {"format"=>nil, "action"=>"index", "controller"=>"articles"}
    merb : worker (port 4000) ~ Params: {"format"=>nil, "action"=>"index", "controller"=>"articles"}

    It seems that merb just drop the connection as soon as it get my request. The following part will be about my debugging.

    My effort to solve/debug the problem.

    First i followed the steps on http://wiki.merbivore.com/howto/installation/gems#troubleshooting and erased all my merb, datamapper and data_objects gems. Just to get a real clean start.

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    > sudo gem update --system
    > gem search --no-version merb | grep merb | xargs sudo gem uninstall -a
    > gem search --no-version dm | grep dm | xargs sudo gem uninstall -a
    > gem search --no-version data_objects | grep data_objects | xargs sudo gem uninstall -a
    > sudo gem sources -c
    > sudo rm /Library/Ruby/Gems/1.8/cache/merb*
    > sudo rm /Library/Ruby/Gems/1.8/cache/dm*
    > sudo gem install -r merb

    After this i created a new application but still with the same result. Now my only option was to dig deep in merb to se why i get those empty replies. (I did stop by in #merb and got some suggestions but nothing helped).

    I started in merb-core in the Dispatcher. The problem seems to be that merb cannot find any actions in my controllers. It does not raise an “action not found” but the problem points to actions/action args.

    Digging deeper I finally find myself in merb-action-args. In the module GetArgs there is a function called get_args and it uses ParseTree to get all action and their arguments. After some simple debugging I found that this is the function that fail.

    (Debugging took nearly 2 hours)

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        def get_args
          klass, meth = self.to_s.split(/ /).to_a[1][0..-2].split("#")
          # Remove stupidity for #<Method: Class(Object)#foo>
          klass = $` if klass =~ /\(/
          ParseTreeArray.translate(Object.full_const_get(klass), meth).get_args
        end

    The row 5 silently fails.

    This make me wonder whats up with my ParseTree installation. Listing my ParseTree gems get me notified of how many versions i have.

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    Select gem to uninstall:
     1. ParseTree-1.7.1
     2. ParseTree-2.1.1
     3. ParseTree-2.2.0
     4. ParseTree-3.0.1
     5. ParseTree-3.0.2
     6. All versions

    I first try to reinstall ParseTree with sudo gem install ParseTree to reinstall 3.0.2.
    The problem still exists so my next step is to uninstall all version and just install the last one.

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    > sudo gem uninstall ParseTree

    Select gem to uninstall:
     1. ParseTree-1.7.1
     2. ParseTree-2.1.1
     3. ParseTree-2.2.0
     4. ParseTree-3.0.1
     5. All versions
    > 5

    > sudo gem install ParseTree
    Successfully installed ParseTree-3.0.2
    1 gem installed

     

    EVREKA!

    This makes merb happy again. Seems like my collection of ParseTree installations made merb unhappy. To get some more understanding of what version made this error i reinstalls all my old versions again, one after one. But after every last one is installed merb still works so there must have been something very wrong with my gems. It shows that i am not alone if you read the comments from a merb 1.0 blog post

    Summary

    merb relies on other gems than the ones named merb-* in this case ParseTree. So when merb starts delivering empty results. There may be ParseTree thats broken. Just erase all ParseTree version and reinstall the ones you need and maybe you will be as happy as i am ;)

    Cheers!

    ]]>     http://www.pastbedti.me/2008/11/merb-10-and-empty-reply-from-server/feed/ 6     Stuck with a gem that just wont uninstall http://www.pastbedti.me/2008/05/stuck-with-a-gem-that-just-wont-uninstall/ http://www.pastbedti.me/2008/05/stuck-with-a-gem-that-just-wont-uninstall/#comments Tue, 13 May 2008 18:56:05 +0000 Mathias Stjernström http://stjernstromblog.cust.globalinn.com/?p=9 Yesterday i was updating all my ruby gems. During the update a got disturbed by something so i did not pay attention what gems got updated.

    This morning i found my current app not starting up.

    This is how i solved it

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    #script/server
    => Booting Mongrel (use 'script/server webrick' to force WEBrick)
    => Rails application starting on http://0.0.0.0:3000
    => Call with -d to detach
    => Ctrl-C to shutdown server
    ** Starting Mongrel listening at 0.0.0.0:3000
    ** Starting Rails with development environment...
    ** Rails loaded.
    ** Loading any Rails specific GemPlugins
    Exiting
    /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require': no such file to load -- /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1-java/lib/mongrel/init.rb (MissingSourceFile)
    from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
    from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in `require'
    from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:342:in `new_constants_in'
    from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in `require'
    from /opt/local/lib/ruby/gems/1.8/gems/gem_plugin-0.2.3/lib/gem_plugin.rb:134:in `load'
    from /opt/local/lib/ruby/site_ruby/1.8/rubygems/source_index.rb:184:in `each'
    from /opt/local/lib/ruby/site_ruby/1.8/rubygems/source_index.rb:184:in `each'
    from /opt/local/lib/ruby/gems/1.8/gems/gem_plugin-0.2.3/lib/gem_plugin.rb:112:in `load'
    ... 21 levels...
    from /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/server.rb:39
    from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
    from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
    from script/server:3`

    Ok, so now what? I know i do not run java. Not just yet.

    My update last night must have installed a mongrel-1.1-java, no biggy i just uninstall.

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    gem uninstall mongrel

    Select gem to uninstall:
    1. mongrel-1.0.1
    2. mongrel-1.0.2
    3. mongrel-1.1
    4. mongrel-1.1-java
    5. mongrel-1.1.1
    6. mongrel-1.1.4
    7. All versions
    > 4
    INFO:  In order to remove mongrel, please execute:
    gem uninstall mongrel --install-dir=/opt/local/lib/ruby/gems/1.8

    If i add the install dir i get the same result. Just for fun i try to delete the ruby-java-gem folder -> /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1-jruby/

    But still the same error and gem still think the gem is installed.

    This became my solution

    For each installed gem there is a gemspec file that holds information about the gem. After deleting the gemspec for ruby-1.1-java everything went back to normal.

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    sudo rm /opt/local/lib/ruby/gems/1.8/specifications/mongrel-1.1.1.gemspec

    Hope this can help someone ;)

    ]]>     http://www.pastbedti.me/2008/05/stuck-with-a-gem-that-just-wont-uninstall/feed/ 4