Notes posted by FooBarWidget

:case_sensitive is on by default?

In contrast to what the documentation said, :case_sensitive seems to be on by default. This is the case with MySQL at least, I’m not sure about other databases.

Better explanation for ActionController sweepers

The first sentence in this description is confusing. http://codelevy.com/articles/2008/03/04/rails-caching-sweepers-controllers-and-models explains it more clearly.

collection.exists?(conditions)

The created association method also supports the ‘exists?’ method, similar to ActiveRecord::Base#exists?

has_and_belongs_to_many :categories
...
categories.exist?(1)   # Check whether there's a relation with a Category
                       # object whose id is 1.
categories.exist?(:id => 1)    # ditto
categories.exist?(['id', 1])   # ditto
categories.exist?(:name => 'Anime')