jfloff / sample_app

The sample_app on Ruby on Rails tutorial

Ruby on Rails Tutorial: sample application

This is the sample application for Ruby on Rails Tutorial: Learn Rails by Example by Michael Hartl.

You can view this application Heroku deployment here

My Notes

GenPop

• Ajax: allows web pages to send requests asynchronously to the server without leaving the page. Ajax = _ Asynchronous JavaScript and XML _

Rake

• Reset database

  $ bundle exec rake db:reset
  

Git

• Reset to HEAD

  $ git co master
  $ git reset --hard master
  $ git branch -D <branch>
  

• Create a branch from another branch

  $ git checkout -b <new-branch> <existing-branch>
  

• Change the last local commit message

  $ git commit --amend -m "New commit message"
  

Ruby

• What the fuck is ||= ??

    >> @user
    => nil
    >> @user = @user || "the user"
    => "the user"
    >> @user = @user || "another user"
    => "the user"
  

Rails

• <%= render @users %> automatically renders each of the users in the @users variable using the _user.html.erb partial.