1
2
3
4

class Article < ActiveRecord::Base

  # Find all articles in the given date range based on the published_at field
...

1
2
3
4

has_many :expenses, :dependent => :destroy do
  def for_week(day)
    find(:all, :conditions => { :spent_at => day.to_time.beginning_of_week.to_date..(day.to_time.beginning_of_week.to_date + 6)})
...