Rom Repository relation

friend.rb

require 'equalizer'
require 'dry/data'

module Entities
  class Friend < Dry::Data::Struct
    include Equalizer.new(:id, :source_id, :target_id)

    attribute :id, 'int'
    attribute :source_id, 'int'
    attribute :target_id, 'int'
  end
end

friends.rb

module Persistence
  module Relations
    class Friends < ROM::Relation[:sql]
      dataset :friend
      register_as :friend
    end
  end
end

user.rb

require 'equalizer'
require 'dry/data'

module Entities
  class User < Dry::Data::Struct
    include Equalizer.new(:id, :name)

    attribute :id, 'int'
    attribute :name, 'string'
  end
end

users.rb

module Persistence
  module Relations
    class Users < ROM::Relation[:sql]
      dataset :user
      register_as :user
    end
  end
end