| #!/usr/bin/env ruby | |
| # Remove all gems EXCEPT defaults :) | |
| `gem list -d`.split(/\n\n^(?=\w)/).each do |data| | |
| match = data.match(/(?<name>([^\s]+)) \((?<versions>.*)\)/) | |
| name = match[:name] | |
| versions = match[:versions].split(', ') | |
| if match = data.match(/^.*\(([\d\.]*),? ?default\): .*$/) | |
| next if match[1].empty? # it's the only version if this match is empty |
| #Model | |
| @user.should have(1).error_on(:username) # Checks whether there is an error in username | |
| @user.errors[:username].should include("can't be blank") # check for the error message | |
| #Rendering | |
| response.should render_template(:index) | |
| #Redirecting | |
| response.should redirect_to(movies_path) |
| require 'sinatra' | |
| require 'action_mailer' | |
| class Mailer < ActionMailer::Base | |
| def contact | |
| mail( | |
| :to => "test@example.com", | |
| :from => "test@example.com", | |
| :subject => "Test") do |format| | |
| format.text |
By default, Rails applications build URLs based on the primary key -- the id column from the database. Imagine we have a Person model and associated controller. We have a person record for Bob Martin that has id number 6. The URL for his show page would be:
/people/6
But, for aesthetic or SEO purposes, we want Bob's name in the URL. The last segment, the 6 here, is called the "slug". Let's look at a few ways to implement better slugs.