app/models/answer.rb
# == Schema Information
# Schema version: 20101101011500
#
# Table name: answers
#
# id :integer(4) not null, primary key
# checklist_id :integer(4)
# answer_definition_id :integer(4)
# text :text
# created_at :datetime
# updated_at :datetime
#
class Answer < ActiveRecord::Base
DISTRICT_PARENT = :checklist
belongs_to :checklist
belongs_to :answer_definition
has_many :previous_answers, :class_name => 'Answer',
:finder_sql => 'select * from answers where id = #{id} and checklist_id in (#{checklist.student.checklists.collect(&:checklist_id)}) and created_at < \' #{(checklist.created_at || Time.now).to_s(:db)}\' order by created_at ASC'
validates_presence_of :answer_definition_id
delegate :value, :to => :answer_definition
def self.find_all_by_element_definition(element_definition)
find(:all, :conditions=>["answer_definition_id in ( ? ) ",element_definition.answer_definitions ])
end
end