Software Developer since 1990, Full time Ruby and Ruby on Rails developer, enthusiast, and contributor.
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Ubuntu (Hardy): Install Apache 2 Server
August 8, 2009 – 18:04
Setting up Apache 2 server on Ubuntu Hardy is pretty easy.
sudo aptitude install apache2 apache2.2-common apache2-mpm-prefork apache2-utils libexpat1 ssl-cert
Note:
I choose apache2-mpm-prefork (single thread) over apache2-mpm-worker (multi-threaded requests). This is because mod_rails may work with apache2-mpm-worker, but is only currently tested to work with apache2-mpm-prefork.
ServerName
Edit your apache configuration file:
$ vim /etc/apache2/apache2.conf
At the end of the file add the following:
ServerName your_server_name
And restart your server:
$ sudo apache2ctl graceful
Note:
If you get the following error when restarting Apache it means that you didn’t succeed in setting the ServerName:
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
Test
Start your prefered browser and open your server ip address (e.g. http://127.0.0.1), you should see something like this:
Or use curl (command line is always better):
$ curl http://127.0.0.1
You should see:
<html><body><h1>It works!</h1></body></html>
It Works!!!
Ruby: Mixin Template
August 8, 2009 – 07:39
This is the basic structure I use to create a mixin in Ruby:
# = Mixin Template # == Usage # ActionController::Base.send :include, MixinModuleName module MixinModuleName def self.included(recipient) recipient.extend(ClassMethods) recipient.class_eval do include InstanceMethods end end module InstanceMethods end module ClassMethods end end
Git: Creating a Remote Branch (and track it locally)
August 8, 2009 – 07:34
Required steps to create and track locally a remote branch with git:
# Create new remote branch git push origin origin:refs/heads/new_branch_name # Make sure everything is updated git fetch origin # Check your branch has been created git branch -r # Track a remote branch git branch --track new_branch_name origin/new_branch_name # Checkout remote branch git checkout new_branch_name
Git: Undo commit
August 8, 2009 – 07:29
Sometimes, when the caffeine no longer works, you can make a mistake on a commit. Either you have second thoughts about your commit message, you just forgot to track new project files, or whatever the reasons are you can always undo your last commit (as long you don’t push it to origin repository):
$ git reset --soft HEAD^
Gem: Simple Navigation (Navigation menu builder for Ruby on Rails)
August 8, 2009 – 05:57
I’ve just released my new gem simple_navigation. This gem help’s you to create a navigation menu for your Ruby on Rails application.
Installation
Edit your config/environment.rb to setup simple_navigation gem:
config.gem "mexpolk-simple_navigation", :lib => "simple_navigation", :source => "http://gems.github.com"
And from the command line, install the plugin:
rake gems:install
Usage
To create your menus create a new file named config/initializers/simple_navigation.rb like this:
SimpleNavigation::Builder.config do |map| map.navigation :default do |navigation| # Root menu without child elements (menus) that points to /dashboard navigation.menu :home, :url => { :controller => "home", :action => "index"} # Root menu with child menus without anchor link navigation.menu :contacts do |contacts| # Child menu with many possible urls (or many controllers and actions) contacts.menu :list, :url => { :controller => "contacts", :action => "index" } do |contact_list| # This menu will marked as current when you're on the following # controllers and actions (including the controller and action # specified in the :url option): contact_list.connect :controller => "contacts" # ...current on any action from this controller contact_list.connect :controller => "people", :except => "new" contact_list.connect :controller => "companies", :except => "new" end # Another submenu that points to /person/new contacts.menu :new_person, :url => { :controller => "people", :action => "new" } # Another submenu that points to /company/new contacts.menu :new_company, :url => { :controller => "companies", :action => "new" } end # Another root menu with nested submenus navigation.tab :admin, :url => { :controller => "users", :action => "index" } do |admin| admin.menu :users, :url => { :controller => "users", :action => "index" } do |users| users.menu :reports, :url => { :controller => "user_reports", :action => "index" } do |reports| reports.menu :activity, :url => { :controller => "user_reports", :action => "activity" } reports.menu :login_atempts, :url => { :controller => "user_reports", :action => "login_atempts" } end users.menu :new_user, :url => { :controller => "users", :action => "new" } end end end end
Finally, to render you newly created menu called :default, in your default layout (layout/application.erb):
<%= simple_navigation :default %>
Ready for Internationalization (i18n)
If you want to use internationalization in your menus, set the option :i18n => true like this:
SimpleNavigation::Builder.config do |map| map.navigation :default, :i18n => true do |navigation| ... end end
And add to your config/locales files (e.g. es-MX.yml) the following:
es-MX: simple_navigation: default: # The name of your navigation menu home: # The name of your root menu title: "Inicio" # The translated title for your root menu menus: index: title: "Panel de Control" # The title for index action child menu new: title: "Nueva Página" # The title for new action child menu
Sample Application
I have a sample application at GitHub so you can see it work. This application has the following configuration (config/initializers/simple_navigation.rb):
SimpleNavigation::Builder.config do |map| map.navigation :default, :i18n => true do |navigation| navigation.menu :home, "Wellcome", :url => { :controller => "home", :action => "index" } do |home| home.menu :settings, "Appliction Settings", :url => { :controller => "home", :action => "settings"} end navigation.menu :pages, :url => { :controller => "pages", :action => "index" } do |pages| pages.menu :page_one, "One", :url => { :controller => "pages", :action => "one" } pages.menu :page_two, "Two", :url => { :controller => "pages", :action => "two" } end end end
When you render the navigation menu, it creates an unordered list like this:
<ul id="simple_navigation_default" class="simple_navigation" depth="0"> <li id="simple_navigation_default_menus_home" class="menu" drop_down="true"> <a href="/home">Wellcome</a> <ul id="simple_navigation_default_menus_home_menus" depth="1" style="display: none;"> <li id="simple_navigation_default_menus_home_menus_settings" class="menu" drop_down="false"> <a href="/home/settings">Appliction Settings</a> </li> </ul> </li> <li id="simple_navigation_default_menus_pages" class="menu current_child" drop_down="true"> <a href="/pages">Pages</a> <ul id="simple_navigation_default_menus_pages_menus" depth="1" style="display: none;"> <li id="simple_navigation_default_menus_pages_menus_page_one" class="menu" drop_down="false"> <a href="/pages/one">One</a> </li> <li id="simple_navigation_default_menus_pages_menus_page_two" class="menu current" drop_down="false"> <a href="/pages/two">Two</a> </li> </ul> </li> </ul>
This result, with a little help of our friends CSS+Javascript will result in something like this:
Screenshot-Simple Navigation - Sample Application - Mozilla Firefox
Check the Simple Navigation Example yourself… Hope you enjoy it!
Ruby: Convert Number to Words (Numerical)
August 8, 2009 – 05:07
Recently I’ve published my new gem NumberToWords. This plugin/gem will override Ruby’s Numeric class adding a new method called to_words. For now, it only works for Spanish.
Sample usage:
require 'rubygems' require 'number_to_words' 5678.to_words => “cinco mil seiscientos setenta y ocho”
Another common usage is for describing currency quantities:
number = 4567.90 => 4567.9 number.to_words.capitalize << ' pesos ' << (number.to_s.split('.')[1] || 0).rjust(2,'0') => "Cuatro mil quinientos sesenta y siete pesos 09/100 M.N."
http://github.com/mexpolk/number_to_words/tree/master
Happy Hacking!
GEdit: Snippets for Ruby on Rails
September 23, 2008 – 01:40
I’ve just created a new GitHub repo with GEdit snippets for Ruby on Rails. Any suggestions and comments are welcome. To install them simply copy the xml files to your ~/.gnome2/gedit/snippets directory.
Refs:
GEdit
GEdit Snippets Plugin
Ubuntu: Disable That Annoying Touchpad Click
July 21, 2008 – 16:01
In my opinion, one of the worse inventions since “PC”, is the annoying (and I’m been respectful) Touchpad. Not only it takes you out of your home row (keyboard), or the fact that you need like two passes for reaching corners. But because it really &*^#$%^*$ annoys me when typing accidentally make a click.
Lucky me… there’s a way to disable Touchpad-Click. Simply go to System > Preferences > Mouse, click on Touchpad tab, and uncheck: Ennable mouse clicks with touchpad.
So long Touchpad-click!!!
Git: Adding a Ruby on Rails Project to Git
June 10, 2008 – 19:32
Here’s how to add a recently created Ruby on Rails project to git:
1. Create your new project:
$ rails -d mysql project_name
2. Create some .gitignore empty files so you save the entire structure of your project (git doesn’t include empty folders):
$ touch db/.gitignore lib/.gitignore log/.gitignore tmp/.gitignore vendor/.gitignore
3. Create a new .gitignore file in the root directory of your project with the following content:
log/**/* tmp/**/* db/schema.rb
Note: If you are using sqlite add db/*.sqlite3 to .gitignore so you do not have the database into the repository (you can db:migrate it whenever you need it). Thanks for your reply Piku.
4. Initialize local repository:
$ git init
5. Add the project files and make que initial import:
$ git add . $ git commit -a -m "* Initial import"
6. Finally if you have a gitosis server you can add it with the following commands:
$ git remote add origin git@YOUR_SERVER_NAME:project_name.git $ git push origin master
That’s it, your project sources are now managed by git.
Happy hacking!
