Working with associated models

gistfile1.rb

# This input set:
class Idea
  class Create
    include Command
    
    required do
      string :title, length: 100
      string :body
      
      model :user, builder: User::CreateViaEmail, pk: true
    end
    
  end
end

# Allows this (passing in a valid, saved user):
Idea::Create.run(params, user: current_user)

# And this (finding by id):
Idea::Create.run(params, user: opts[:user_id])

# And this (building from attributes):
Idea::Create.run(params, user: {email: opts[:email], name: opts[:name]})