ROM mapper with anima model

rom_mapper_and_anima.rb

require 'rom'
require 'anima'

class User
  include Anima.new(:id, :name, :tasks)
end

class Task
  include Anima.new(:title)
end

user_mapper = ROM::Mapper.build do
  model User
  map :id
  map :name, from: :user_name
end

task_mapper = ROM::Mapper.build do
  model Task
  map :title
end

puts user_mapper.group(tasks: task_mapper).
  load(id: 1, user_name: 'Piotr', tasks: [{title: 'Task 1'}, {title: 'Task 2'}]).inspect
#<User id=1 name="Piotr" tasks=[#<Task title="Task 1">, #<Task title="Task 2">]>