tl;dr: Ruby's Bundler environment is passed on to system calls, which may not be what you may want...
Rails gives you migrations to change your database schema with simple commands like add_column or update. Unfortunately these commands...
In specs, the session never persists but is always a new object for each request. Data put into the session...
All columns of a model's database table are automagically available through accessors on the Active Record object.
What you copy may not be what you see in the browser. Here is an online tool to determine the...
Note: This technique is confusing and slows down your test suite. Copy the attached code to features/support. This gets you...
Rails’ reputation as a relatively secure Web framework is well deserved. Out-of-the-box, there is protection against many...
Spreewald's patiently repeats the given block again and again until it either passes or times out.
Unfortunately, Capybara does not offer a switch to disable cookies in your test browser. However, you can work around that...
The following code doesn't work like expected: page.find(css_selector).find(other_css_selector) The second .find will search...
Great presentation about writing Javascript like you write everything else: Well-structured and tested. JavaScript is no longer a toy...
Access the Method object Dead simple: Get the method object and ask for its owner: "foo".method(:upcase) # => #
Rails flashes (FlashHash) track a list of used keys, which is not respected when comparing flash hashes.
Smashing Magazine lists some handy tricks for print style sheets, all with CSS: Expand External Links For Print
CSSmatic lets you play around with four rather complex CSS stylings and gives you CSS or SASS code to use...
Do not pass times to date attributes. Always convert times to dates when your application uses time zones. Background
Rails understands a :limit options when you create columns in a migration. Its meaning depends on the column type, and...
Guide how to make fixes in other people's GitHub repositories. It's basically "Open Source Development 101".
TL;DR: You should generally use #size to count associated records. size Counts already loaded elements If the association is...
Here is a hacky way to load dumps directly from the source server, without fully copying them over and extracting...
tl;dr: Do not use merge! for session hashes. Use update instead. Outline Let's assume you're modifying the...
JavaScript has no built-in functions to compare two objects or arrays for equality of their contained values.
MongoMapper is a MongoDB adapter for Ruby. We've forked it so it works for Rails 2.3.x applications running...
Ruby 1.9 changed the default behavior of Module.const_defined? from what it was in Ruby 1.8 -- this can be especially...