ActiveModel: Make Any Ruby Object Feel Like ActiveRecord « Katz Got Your Tongue?
Rails 2.3 has a ton of really nice functionality locked up in monolithic components. I’ve posted quite a bit about how we’ve opened up a lot of that functionality in ActionPack, making it easier to reuse the router, dispatcher, and individual parts of ActionController. ActiveModel is another way we’ve exposed useful functionality to you in Rails 3.
Related cards:
How to make changes to a Ruby gem (as a Rails developer)
At makandra, we've built a few gems over the years. Some of these are quite popular: spreewald (> 1M downloads), active_type (> 1M downloads), and geordi (> 200k downloads)
Developing a Ruby gem is different from developing Rails applications, w...
Automatic Flushing: The Rails 3.1 Plan « Katz Got Your Tongue?
This post explains, in some detail, how we will implement a nice performance boost for Rails developers. Understanding the details might help gain the full benefits of the optimization, but you will gain some benefits even if you have no idea how ...
The Ruby Object Model
In Ruby (almost) everything is an Object. While this enables a lot of powerful features, this concept might be confusing for developers who have been programming in more static languages, such as Java or C#. This card should help understanding t...
has_many :bugs, :through => :rails: Make your shoulda tests faster with fast_context
decided to go fixtureless with Shoulda + Factory Girl. All good, except one problem. Slow as fuck tests. So here’s fast_context as a solution for it. fast_context compiles all the ‘should’s within a context into a single test.
iPhone on Rails and ObjectiveResource; Making communication between the iPhone and a Rails web-service pain-free.
ObjectiveResource is an Objective-C port of Ruby on Rails' ActiveResource. It provides a way to serialize objects to and from Rails' standard RESTful web-services (via XML or JSON) and handles much of the complexity involved with invoking web-serv...
Rails: How to check if a certain validation failed
If validations failed for a record, and you want to find out if a specific validation failed, you can leverage ActiveModel's error objects.
You rarely need this in application code (you usually just want to print error messages), but it can be u...
esbuild: Make your Rails application show build errors
Building application assets with esbuild is the new way to do it, and it's great, especially in combination with Sprockets (or Propshaft on Rails 7).
You might be missing some convenience features, though.
Here we cover one specific issue:
Once y...
Rails: Talking to the database without instantiating ActiveRecord objects
Instantiating ActiveRecord objects comes expensive. To speed up things, you can choose a more direct way to talk to your database: the [ActiveRecord::ConnectionAdapters::DatabaseStatements](http://api.rubyonrails.org/classes/ActiveRecord/Connect...
Testing if two date ranges overlap in Ruby or Rails
A check if two date or time ranges A and B overlap needs to cover a lot of cases:
- A partially overlaps B
- A surrounds B
- B surrounds A
- A occurs entirely after B
- B occurs entirely after A
This means you actually have to check that:
...
Ruby object equality
TLDR
if you define a equality method for a class you must also implement
def hash.
Ruby has a lot of methods that have to do something with equality, like ==, ===, eql?, equal?. This card should help you differentiate betwe...