Sometimes you inherit a non Rails or non Rack based web app such as PHP, Perl, Java / JEE, etc. I...
Use this MySQL command to show further info about a table: SHOW CREATE TABLE tags; This will output a table...
If a controller action responds to other formats than HTML (XML, PDF, Excel, JSON, ...), you can reach that code in...
You can now add an :inverse_of option to has_one, has_many and belongs_to associations.... Without :inverse_of...
When doing a presentation you may want to hide your desktop icons. You can switch them off (or back on...
After switching to Rails 3 you may get a LoadError with the following message when trying to use your application...
You might find that your Passenger ignores all RailsSomething directives in the vhost for your new Rails 3 application. The...
You will need to upgrade to RSpec >= 2 and rspec-rails >= 2 for Rails 3. Here are some hints to...
Be careful when using params.merge as params is a HashWithIndifferentAccess. Why? Usually this should not be an issue but it...
In rare cases you might need something like form_for (for using form builder methods on the resulting block element...
I prefer the application that I'm currently working on to be reachable at http://localhost/. So when I switch...
Be careful when memoizing a method that returns a scope, e.g.: def variants scoped(:conditions => { :name => name }) end memoize :variants...
When using form_for you can give the form's target URL either as a string or an array:
The timepicker addon adds a timepicker to jQuery UI Datepicker, thus the datepicker (jQueryUI) is required for using any of...
I’m going to list assumptions your systems probably make about names. All of these assumptions are wrong. Try to...
If you previously used version 2.x of Thunderbird and upgraded to 3.x (for example through an Ubuntu release...
The ancestry gem allows you to easily use tree structures in your Rails application. There is one somewhat unobvious pitfall...
If you need to look at the list of methods that are called upon certain events (like before/after saving etc...
This can be helpful when you need the latest file inside a directory for processing in a shell script:
If you did file operations inside a shell or for example using Nautilus, it can take quite a while until...
Take care when trying to set attributes to nil in a blueprint. Given the following master blueprint: Story.blueprint do
If you get an ActiveRecord::RecordNotSaved error, a method inside one of your model's callback chains (before_save etc...
Lately, we’ve been exploring ways to offer web apps that perform like native apps on mobile devices. For this...
Sometimes the order in which strings appear on a page matters to you. Spreewald gives you steps like these: