Get the plugin like so…
script/plugin install git://github.com/adamwiggins/yaml_db.git
This command will dump your data
rake db:data:dump
And load it back
rake db:data:load
Beautiful 
More info here
http://blog.heroku.com/archives/2007/11/23/yamldb_for_databaseindependent_data_dumps/
and
http://stackoverflow.com/questions/490507/best-way-to-export-a-database-table-to-a-yaml-file
Great little gem that let’s you quickly and easily send out mail from your ruby scripts.
gem install pony require 'rubygems' require 'pony' Pony.mail :from=>"me@example.com", :to=>"you@example.com", :subject=>"hello", :body=>"world"
I ran into the same problem when installing mysql gem for Rails development. This fix worked for me http://seanbehan.com/programming/fixing-mysql-for-rails-2-2-development-on-mac-os-x/
The same thing works with the data objects gem. Just specify the path the mysql config that it’s using and the gem should install just fine.
gem install do_mysql -- --with-mysql-config=/opt/local/lib/mysql5/bin/mysql_config
wget http://redis.googlecode.com/files/redis-0.900_2.tar.gz tar xzvf redis-0.900_2.tar.gz cd redis-0.900 make mv redis-server /usr/bin/ mv redis-cli /usr/bin/
Installing monk like this will fail
gem install monk
You’ll need to install the wycats-thor gem first with this command
gem install wycats-thor -s http://gems.github.com
Sinatra won’t reload your files. So if you’re developing your app and want to see any changes made in the browser, install the shotgun gem.
gem install shotgun
You can then use shotgun to run your server
shotgun your_sinatra_ditty.rb
Presto, your ditty will never be out of key
Check it out http://sinatra.seanbehan.com/
This assumes Apache2 and the Phusion Passenger module have already been installed. If not you can get up to speed w/ this resource http://seanbehan.com/ruby-on-rails/new-ubuntu-slice-apache-mysql-php-ruby-on-rails-git-and/
First you need Sinatra, so install the gem
gem install sinatra
We need a home for Frank, so create the minimum number of directories in our web directory. The public directory is where we’ll server images, stylesheets, javascript etc. The tmp directory will be where we control Passenger.
cd /var/www/sinatra mkdir myapp mkdir myapp/tmp mkdir myapp/public cd myapp vim index.rb #in index.rb get '/' do "Fly me to the moon..." end
Next we need a configuration file for Rack, important the file extension is “.ru” not .rb!
vim config.ru require 'rubygems' require 'sinatra' Sinatra::Application.default_options.merge!( :run => false, :env => ENV['RACK_ENV'] ) require 'index' run Sinatra.application
Set up the virtual host
ServerName www.myapp.com DocumentRoot /var/www/sinatra/public
Now you can restart the app if you make adjustments!
touch tmp/restart.txt
Keep on singing
Inspired by http://blog.zerosum.org/2008/7/4/passenger-3-sinatra
Super simple to get double click “desktop” like functionality out of Prototype! For some reason, googling it doesn’t yield many useful results. http://www.google.com/#hl=en&q=double+click+in+prototype+javascript&aq=f&oq=&aqi=&fp=peEfEjG9pWY 
Anyway, here is the code
document.observe('dblclick', function(){
alert("Hello World");
});
Login as the root user or as a user that can execute sudo commands.
#open this file for editing... vim /etc/ssh/sshd_config
Find the line that reads
Port 22
Change this to an different and an available port number…
Port 8000
Next reload ssh
/etc/init.d/ssh reload
You won’t be kicked out of your session. But if you want to open a new connection to your server you need to specify the port number for the connection.
ssh -p8000 root@yourdomain.com
I normally install postfix for my MTA. However, I’ve never really used sendmail so I’d decide to give it a whirl for a new application I’m working on. I don’t use it for anything but handling the mail that the application needs to send out, like new user welcome emails, password resets, etc.
apt-get install sendmail
Sendmail, unlike postfix, won’t work out of the box. Postfix will prompt you for the necessary config setup when running the install. Sendmail won’t, and therefore it’s not ‘out of the box’. You’ll have to make some modifications on your own. Nothing major but this is what I’ve found in order to get it to work, reliably and quickly. The first thing I did was add the fully qualified domain name to my /etc/hosts file
#vim /etc/hosts 127.0.0.1 www.mydomain.com
After this I added the fully qualified domain name to my apache default configuration file
#/etc/apache2/sites-available/default ServerName www.mydomain.com #vhost info etc...
Reload and restart…
/etc/init.d/apache2 force-reload /etc/init.d/sendmail restart
You can test sendmail like so
sendmail email@example.com hello from me .
This should deliver a message to you (the “.” on a new line, followed by a new line, closes the message).
You are currently browsing the Sean Behan's Blog blog archives for August, 2009.
Using the Acts as Taggable On plugin to add categories to a model class, I wanted to override the to_param ...
Step 1. Open up your browser and visit http://www.hexxie.com. You can also go to anything.hexxie.com and everything.hexxie.com, which will resolve to ...
In the view there is a regular Rails form and a javascript function that will be triggered when the country ...
You can download it here http://github.com/suitmymind/acts-as-taggable-on-steroids as well as read usage info (which is for the most part reprinted here). ...
I can’t find a strftime() format that will output the hour without the leading zero. For instance 6:20 will ...
thanks for that
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***Here's an update*** You need to run this command sudo apt-get install libcurl4-gnutls-dev I installed Feedzirra on a new machine and couldn't
Hi Sean! That is awesome. Thanks for sharing! I started using this with action caching and followed http://cobaltedge.com/rails-action-caching-with-query-parameters to allow