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class Speaker < ActiveRecord::Base
belongs_to :user
belongs_to :discussion
validates_uniqueness_of :user_id, :scope => :discussion_id
validates :user, :discussion, :presence => true
after_destroy :destroy_discussion_view
after_destroy :destroy_discussion
private
def destroy_discussion_view
@view = DiscussionView.find_by_user_id_and_discussion_id(self.user_id, self.discussion_id)
@view.destroy if @view
end
def destroy_discussion
self.discussion.destroy unless self.discussion.speakers.any?
end
end
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