has_many :bugs, :through => :rails: Active Record Query Interface 3.0
So here’s an overview of how things are going to work in Rails 3.
Related cards:
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.
Security issues with hash conditions in Rails 2 and Rails 3
Find conditions for scopes can be given either as an array (:conditions => ['state = ?', 'draft']) or a hash (:conditions => { 'state' => 'draft' }). The later is nicer to read, but has horrible security implications in some versions of Ru...
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...
Rails: When to use :inverse_of in has_many, has_one or belongs_to associations
When you have two models in a has_many, has_one or belongs_to association, the :inverse_of option in Rails tells ActiveRecord that they're two sides of the same association.
Example with a has_many / belongs_to association:
c...
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 part...
Rails: Comparison of assignable_values and Active Record enum types
We are using assignable_values for managing enum values in Rails. Nevertheless Rails [is adding more support for enum attributes](https://blog.saeloun.com/2021/02/26/rails-introduces-new-syntax-for-...
Why has_many :through associations can return the same record multiple times
An association defined with has_many :through will return the same record multiple times if multiple join models for the same record exist (a n:m relation). To prevent this, you need to add ->{ uniq } as second argument to has_many (below Ra...
Active Record and PostgreSQL — Ruby on Rails Guides
Rails guide that covers PostgreSQL-specific column types and usages for Active Record.
You should especially keep in mind the special datatypes that PostgreSQL offers. \
Types like json and array take away a lot of the pain that you had on M...
Rails: Encrypting your database information using Active Record Encryption
Since Rails 7 you are able to encrypt database information with Active Record. Using Active Record Encryption will store an attribute as string in the database. And uses JSON for seri...
Accept nested attributes for a record that is not an association
Note: Instead of using the method in this card, you probably want to use ActiveType's nested attributes which is a much more refined way of doing this.
The attach...