app/models/agency_relation.rb
class AgencyRelation < ActiveRecord::Base
belongs_to :agency_person
belongs_to :job_seeker
belongs_to :agency_role
validates_presence_of :agency_person, :job_seeker, :agency_role
def self.in_role_of role_key
where(agency_role_id: AgencyRole.find_by_role(AgencyRole::ROLE[role_key]).id)
end
end