scinote-web/app/models/my_module_group.rb

class MyModuleGroup < ApplicationRecord
  include SearchableModel

  validates :experiment, presence: true

  belongs_to :experiment, inverse_of: :my_module_groups
  belongs_to :created_by,
             foreign_key: 'created_by_id',
             class_name: 'User',
             optional: true
  has_many :my_modules, inverse_of: :my_module_group, dependent: :nullify

  scope :without_archived_modules, (lambda do
    joins(:my_modules).where('my_modules.archived = ?', false).distinct
  end)

  def deep_clone_to_experiment(current_user, experiment)
    clone = MyModuleGroup.new(
      created_by: created_by,
      experiment: experiment
    )

    # Get clones of modules from this group, save them as hash
    cloned_modules = my_modules.workflow_ordered.each_with_object({}) do |m, h|
      h[m.id] = m.deep_clone_to_experiment(current_user, experiment)
      h
    end

    my_modules.workflow_ordered.each do |m|
      # Copy connections
      m.inputs.each do |inp|
        Connection.create(
          input_id: cloned_modules[inp[:input_id]].id,
          output_id: cloned_modules[inp[:output_id]].id
        )
      end

      # Copy remaining variables
      cloned_module = cloned_modules[m.id]
      cloned_module.my_module_group = self
      cloned_module.created_by = m.created_by
      cloned_module.workflow_order = m.workflow_order
    end

    clone.my_modules << cloned_modules.values
    clone.save
    clone
  end
end