Embed Google Analytics code for some environments only
When you use google analytics to track your visitors interactions, you should ensure that it runs on your production site only. Otherwise it will spoil your statistics. To prevent this, test for the right environment and place the JS-code afterwards:
- if Rails.env.production?
:javascript
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-XXXXXXXX-X']);
_gaq.push(['_trackPageview']);
...
Related cards:
Good real world example for form models / presenters in Rails
We have often felt the pain where our models need to serve too many masters. E.g. we are adding a lot of logic and callbacks for a particular form screen, but then the model becomes a pain in tests, where all those callbacks just get in the way. O...
Why you can't use timezone codes like "PST" or "BST" for Time objects
Rails' ActiveSupport::TimeWithZone objects have both a timezone code and offset, e.g. Thu, 28 Mar 2019 16:00:00 CET +01:00. Ruby's stdlib TZInfo also has time zones, but with different identifiers.
Unfortunately, not all timezone codes can b...
Google Summer of Code winner: ActiveModel for Ruby on Rails
Finish the remainder of the ActiveModel todo list (observers, callbacks, validations, scoping, and serialization) in addition to associations. Also wire up ActiveModel up to ActiveRecord and ActiveResource.
Introduction to Google Tag Manager (for web developers who know Google Analytics)
As a web developer, you know Google Analytics (GA). Probably you've dropped the GA snippet into more than one website, maybe you've even used its Javascript API to implement tracking at the event level.
Google Tag Manager (GTM) is a related tool,...
whenever: Installing cron jobs only for a given Rails environment or Capistrano stage
We use the whenever gem to automatically update the crontab of the servers we deploy to. By default, whenever will update all servers with a matching role ([we use the :cron role ](https://makandracards.com/m...
Middleman configuration for Rails Developers
Middleman is a static page generator that brings many of the goodies that Rails developers are used to.
Out of the box, Middleman brings Haml, Sass, helpers etc. However, it can be configured to do even better. This card is a list of improvement ...
Guide to localizing a Rails application
Localizing a non-trivial application can be a huge undertaking. This card will give you an overview over the many components that are affected.
When you are asked to give an estimate for the effort involved, go through the list below and check wh...
Rails: Assigning associations via HTML forms
Let's say we have posts with an attribute title that is mandatory.
Our example feature request is to tag these posts with a limited number of tags. The following chapters explain different approaches in Rails, how you can assign such a...
Rails: Have different session secrets for all environments
The Rails secret_token must be unique for each application and any instance of it. If not, someone could exploit this by creating a user with ID = 1 (e.g. on staging), sign in and then use that cookie to authenticate on another site (e.g. on p...
Use different code for Rails 2 and Rails 3
When writing a piece of reusable code, you sometimes need to have separate code for Rails 2 and Rails 3. You can distinguish between Rails versions like this:
if Rails.version < '3' # mind the quotes
# Rails 2 code goes here
else
...