If you're using Paperclip to store and convert images attached to your models, processing a lot of images will...

If you get this error while deploy and you are sure the Gemfile.lock is in the version control check your...

Our rcov:all task for aggregated RSpec/Cucumber coverage was overhauled extensively. Among other things it now works for Rails 2...

Code coverage is the ratio of code lines kissed by a test vs. the total number of lines in your...

Association named 'variations' was not found; perhaps you misspelled it? I just was hunting down a strange error with this...

When you're getting this error, one possibility is that you've created a select field for an association instead...

One of the most common production errors are ActionController::MethodNotAllowed errors. They usually happen when someone reloads a form by...

The unix command line tool less is a good choice for browsing logfiles. In the standard configuration, though, it does...

A list of CSS vendor-prefixes.

When internationalizing your Rails app, you'll be replacing strings like 'Please enter your name' with t('.name_prompt'). You...

Submit buttons in Rails come with a useful option :disable_with which will disable the button when clicked and change...

For university I have to stay up-to-date with lecture documents. Since my university doesn't offer RSS feeds...

When Rack::Bug has been added to your project and your Apache2/Passenger only replies with an Error 500 (Internal Server...

To reduce download time, application servers usually serve content using gzip compression, if the browser supports it.

When you use google analytics to track your visitors interactions, you should ensure that it runs on your production site...

Framework to write command-line apps in Ruby. Comes with a nice way of processing parameter options, some utility classes...

When you have a complex recipe setup with multistage deployment you may run into this error: `role_list_from': unknown...

[1,2,3,4].sample # => e.g. 4 If you'd like to cheat and give different weights to each element...

Scenario outlines allow us to more concisely express repetitive examples through the use of a template with placeholders.

When you use one line Ruby comments in ERB templates you should never do this (notice the whitespace in front...

Git has a built-in repository viewer for your web browser. a bit similar (but less awesome) than github.

The SQL code generated by Graticule's spherical distance computation is insufficient and can lead to NULL distances in edge...

Seems like a useful gem for cases where ActiveRecord is overkill but you don't want to do everything by...

I introduced DataMapper on my last two major projects. As those projects matured after I had left, they both migrated...