antoniolorusso.com » Ruby

Nokogiri, RVM, Homebrew and headhache!!!

antonio lorusso — Sat, 11 Jun 2011 13:32:48 +0000

Thanks to a gist (which I forked and slightly changed) I was able to finally install Nokogiri on my mac:

export BREW_HOME=/usr/local

brew install libxml2
brew link libxml2
brew install https://github.com/adamv/homebrew-alt/raw/master/duplicates/libxslt.rb
brew link libxslt
brew install libiconv
brew link libiconv
gem install nokogiri -- --with-xml2-dir=$BREW_HOME/Cellar/libxml2/2.7.8 --with-xslt-dir=$BREW_HOME/Cellar/libxslt/1.1.26 --with-iconv-dir=$BREW_HOME/Cellar/libiconv/1.13.1/

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If you had MacPorts previously installed, it might still not work so
sudo mv /opt/local /opt/local_old
and try again.

Enjoy

Rails and PostgreSQL

antonio lorusso — Mon, 21 Jun 2010 22:17:54 +0000

Complaining, screaming, sweating, swearing …. why it doesnt work … jeeeeeezzz/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_specification.rb:76:in `establish_connection': Please install the postgres adapter: `gem install activerecord-postgres-adapter` (no such file to load -- active_record/connection_adapters/postgres_adapter) (RuntimeError)

And then a light … “I upgraded postgresql recently!”

Just reinstall the postgres gem and you are done…

What a night!

Macports, Snow Leopard and XCode 3.2

antonio lorusso — Sun, 18 Oct 2009 00:09:47 +0000

When I upgraded my macbook to Snow Leopard, macports just worked as it was before, or so I thought, until yesterday when I tried to install ImageMagick and rmagick ruby gem and I got this error:
gem install rmagick ERROR: Error installing rmagick: ERROR: Failed to build gem native extension. /opt/local/bin/ruby extconf.rb checking for Ruby version >= 1.8.5... yes checking for gcc... yes checking for Magick-config... yes checking for ImageMagick version >= 6.3.5... yes checking for HDRI disabled version of ImageMagick... yes checking for stdint.h... no checking for sys/types.h... no checking for wand/MagickWand.h... no Can't install RMagick 2.11.1. Can't find MagickWand.h. *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/opt/local/bin/ruby
After having lost the best of my youth trying to fix this issue, I can’t remember exactly how I did it, but I came up with this idea of reinstalling ruby and… guess what? It did work!
So the lesson here is … whenever you upgrade to a major release of XCode, you have to reinstall all your macports. These commands can save your day or two:
$ sudo port selfupdate $ sudo port sync $ sudo port upgrade --force installed

Rails and Passenger ( aka mod_rails )

antonio lorusso — Sun, 22 Mar 2009 13:30:44 +0000

We tried to setup a rails application in a server subfolder in a way that could have been accessible through an URL like http://servername/rails, so we followed the configuration manual for mod_rails.We found that, to make rails works in a subfolder, should have used the Apache parameter RailsBaseURI.

With a great surprise, that didn’t worked so we started trying all possible apache configuration combinations to avoid that 404 error that was becoming a nightmare.

After few hours we started doubting about our Apache knowledge and even about our capacity of reading and following a couple of stupid instructions on a website!

We gave up and we started googling around when… the solution came out from dozens of blogs, forums and newsletters:

MOD_RAILS IS NOT COMPATIBLE WITH RAILS 2.2.2 AND ITS NEW ROUTING SYSTEM

“HOLY CRAP” was our esclamation and I will not mention here all the italian’s bad words that suddenly came out from our mounth!

So, here the solution: put this line here
config.action_controller.relative_url_root = "/guestbook"
in your environment.rb

Now restart apache and enjoy!

ps. why hadn’t we changed mod_rails with mongrel or anything different? I don’t know!!!!

Rails … the beginning

antonio lorusso — Fri, 13 Mar 2009 21:15:05 +0000

Finally I started a little RoR project with my friend Antonello but we did it in the wrong way

We started from the database design (not exactly the rails way) and we are trying to solve problems that a Rails developer usually doesn’t have like create the scaffold without migration scripts!

Here are 3 simple steps to do it:

rake db:schema:dump (create the schema dump from the existing database)
mv db/schema.rb db/migrate/001_initial.rb (create the initial migration script manually)
script/generate scaffold firstmodule field1:text field2:varchar field3:date –skip-migration

The most important thing you should never forget is that your tables on the database must have a PLURAL name but use the SINGULAR name when you create the scaffold for that table.
( ex: the table name is “tools” but the command to create the scaffold is script/generate scaffold tool )

Happy RoRing !!!

RubyOnRails excitement

antonio lorusso — Fri, 27 Jun 2008 23:43:00 +0000

I just want to share how excited I am studying Ruby and RubyOnRails.
Soon I’ll start the development of a Facebook application with Rails.

stay tuned!