app/models/university/with_research.rb
module University::WithResearch
extend ActiveSupport::Concern
included do
has_many :research_journals, class_name: 'Research::Journal', dependent: :destroy
has_many :research_laboratories, class_name: 'Research::Laboratory', dependent: :destroy
has_many :research_theses, class_name: 'Research::Thesis', dependent: :destroy
end
end