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class UserQuestionGroup < ActiveRecord::Base
hobo_model # Don't put anything above this
fields do
timestamps
end
belongs_to :user, :null => false
belongs_to :question, :null => false
validates_presence_of :question
validate :question_has_category
validate :user_does_not_have_other_question_from_the_same_category
single_permission do
# app manages those internally, don't allow users to do anything with it
false
end
named_scope :find_by_user_and_question, lambda { |uid, qid| {
:conditions => {:user_id => uid, :question_id => qid}}}
named_scope :find_by_mentor_and_question, lambda { |mid, qid| {
:joins => [:user, :question],
:conditions => ['users.mentor_id = ? AND questions.id = ?', mid, qid]}}
protected
# as users can never edit questions on their own if one of those isn't met
# it'll be because of some problem in application
def question_has_category
errors.add(:question, 'must be grouped!') if question._?.question_group.nil?
end
def user_does_not_have_other_question_from_the_same_category
# if there are Questions from the same group associated with the same user
# through user_question_groups report an error
if Question.user_questions_in_group(user_id, question.question_group_id).id_is_not(question_id).count > 0
errors.add(:question, 'user can have only one question from group')
end
end
end
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