If you have a Rails 4 project with malfunctioning jQuery the culprit is likely a new feature in Rails 4 called turbolinks. Turbolinks attempts to speed response times by not reloading the header (in fact the whole page) each time a new request is made. Instead, the body of the page is replaced using ajax and json. The …

If you are starting from scratch on a new rails project you may want to start with what is current, which at the moment is Rails 4 and Bootstrap 3. I would suggest setting up RVM or rbenv before continuing.

Install Rails 4:

gem install rails

Ensure you have it:

$ rails -v
Rails 4.0.0

Create your new project with rails: …

For the uninitiated, Strong Parameters is a gem for white-listing attributes that can be mass assigned. This is a replacement for the Rails method of white-listing that ships in 3.x. It also ships standard in Rails 4, so it behooves you to be familiar with it. Herein, I will discuss a few lessons in switch an existing …

A list of specific blog posts (not written by me) that I believe are helpful for a Rails developer:

Development

• Matt Brictson on Lightning-Fast Sass Reloading in Rails 3.2. How to get CodeKit like reloads with your rails project. This little task is amazing, and will greatly speed stylistic chages.
• Bryan Helmkamp on 7 …

Read

• Ruby on Rails Tutorial: Learn Web Development with Rails
• Eloquent Ruby [Review]({% post_url 2013-08-27-book-review:-eloquent-ruby %})
• Metaprogramming Ruby
• The RSpec Book [Review]({% post_url 2013-09-14-book-review:-the-rspec-book %})
• Practical Object-Oriented Design in Ruby
• Objects on Rails
• David …

Create a controller without tests.

rails generate controller {controller name} {views/methods} --no-test-framework

Create integration test

rails generate integration_test {test_name}

Roll back a migration

rake db:rollback

Rspec test for Mass Assign Vulnerbility (or attribute not being accessible):

describe …

Set up a rails app with heroku, zerigo DNS, and bitbucket in one pomodoro:

rails new {app_name} --skip-test-unit
cd {app_name}
git init
git add .
git commit -m "generated skeleton"
vim Gemfile

Gemfile changes

< gem 'sqlite3'
---
> group :development do
9a10,11
>   gem 'sqlite3'
> end …

Below are a list of Gems have found to be useful as I was learning rails:

Testing

gem 'factory_girl_rails'

FactoryGirl automates the process of model creation for the purpose of testing.

gem 'launchy'

Launch allows you to open a webpage in testing, good for debugging tests

gem 'annotate' …

Ruby rails install

sudo apt-get install ruby rubygems

Install rails:

gem install rails

Long wait and then this result:

Fetching: i18n-0.6.1.gem (100%)
ERROR:  While executing gem ... (Errno::EACCES)
    Permission denied - /var/lib/gems

Installing RVM per Stackoverflow answer .:

curl -L https://get.rvm.io | bash …