You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 20230103123121_populate_api_action_parent_id.rb
    path of file: ./repos/violet_rails/db/migrate
    
    the code of the file until where you have to start completion: class PopulateApiActionParentId < ActiveRecord::Migration[6.1]
  # Since there is no effective way to determine the parent api_action for executed api actions, 
  # this method will only work for api_resource_actions whose parent api_namespace_actions are not updated after execution.

  def up
    ApiNamespace.all.each do |api_namespace|
      api_namespace.api_actions.each do |api_action|
        api_namespace.executed_api_actions.where({
          payload_mapping: api_action.payload_mapping,
        
    
  def up
    ApiNamespace.all.each do |api_namespace|
      api_namespace.api_actions.each do |api_action|
        api_namespace.executed_api_actions.where({
          payload_mapping: api_action.payload_mapping,
          redirect_url: api_action.redirect_url,
          request_url: api_action.request_url,
          email: api_action.email,
          custom_headers: api_action.custom_headers,
          method_definition: api_action.method_definition,
          email_subject: api_action.email_subject,
          type: api_action.type, 
          action_type: api_action.action_type
        }).update_all(parent_id: api_action.id)
      end
    end

    # For executed api actions whose parent_id couldn't be populated, can be updated manually.
    # script to list orphan api actions
    orphan_api_actions = []
    ApiNamespace.all.each do |api_namespace|
      api_namespace.executed_api_actions.where(parent_id: nil).each { |api_action| orphan_api_actions << [api_namespace.id, api_action.id, api_action.api_resource_id]}
    end
    p orphan_api_actions.reject { |c| c.empty? }
  end