class Client < ApplicationRecord has_many :client_subprojects, class_name: 'Subproject', foreign_key: 'client_id' has_many :owner_subprojects, class_name: 'Subproject', foreign_key: 'owner_id' has_many :builder_subprojects, class_name: 'Subproject', foreign_key: 'builder_id' validates :company_name, :firstname, :lastname, presence: true # Add other validations as needed end