company_migration.rb

log_path = File.join(File.dirname(__FILE__), 'company_migration.log')
puts "Writing log to '#{log_path}'"

# a - append to file
open(log_path, 'a') do |f|
  f.puts 'Running migration script'

  f.puts 'Moving values from some custom fields to core fields...'
  Company.find_each do |c|
    c.update!(
      short_name: c.try(:em_short_name),
      vat_number: c.try(:em_inn),
      email: c.try(:em_email),
      phone_number: c.try(:em_phone_number) || c.try(:em_phone)
    )
  end
  f.puts 'Done!'

  f.puts 'Creating Company::StateOrder records'
  CRM::StateOrder.joins(:company).find_each do |so|
    company_state_order = Company::StateOrder.find_or_create_by!(company: so.company)
    # 'update_attribute' to skip validations because VKGC has a required field added in EntityManager
    so.update_attribute(:company_state_order, company_state_order)
  end
  f.puts 'Done!'

  f.puts 'Creating Company::Pansion records'
  Pansion.find_each do |p|
    company_id = p.try(:em_company) || p.try(:em_company_id)
    next if company_id.blank?

    company = Company.find(company_id)

    # we don't want to have Company with Company::StateOrder and Company::Pansion
    if company.state_order
      f.puts "Pansion with id '#{p.id}' and name '#{p.name} has Company with id #{company.id}' and name '#{company.name}' but the company already has Company::StateOrder so Company::Pansion isn't created"
      next
    end

    company_pansion = Company::Pansion.find_or_create_by!(company_id: company_id)
    p.update!(company_pansion: company_pansion)
  end
  f.puts 'Done!'

  f.puts 'Creating Company::StateOrder records for companies without a pansion or a state order'
  Company.find_each do |c|
    next if c.pansion || c.state_order

    f.puts "Company with id '#{c.id}' and name '#{c.name}' doesn't have a pansion or a state order. Creating Company::StateOrder"
    Company::StateOrder.find_or_create_by!(company: c)
  end
  f.puts 'Done!'

  f.puts 'Creating Company::ServiceProvider records!'
  ServiceProvider.with_kind(:default).find_each do |sp|
    company = Company.find_or_create_by!(name: sp.name) do |c|
      c.name = sp.name
      c.vat_number = sp.inn
    end

    provider = Company::ServiceProvider.find_or_create_by!(company: company)

    Resident::AdditionalService.where(service_provider_id: sp.id).find_each do |as|
      as.update!(company_service_provider: provider)
    end
  end
  f.puts 'Done!'

  f.puts 'Creating Company::Lab records, transfering Analysis.service_providers labs to Company::Lab!'
  ServiceProvider.with_kind(:lab).find_each do |sp|
    company = Company.find_or_create_by!(name: sp.name) do |c|
      c.name = sp.name
      c.vat_number = sp.inn
    end

    lab = Company::Lab.find_or_create_by!(company: company)

    Analysis.where(service_provider: sp).find_each do |a|
      a.update!(company_lab: lab)
    end
  end
  f.puts 'Done!'

  f.puts 'Migration script is finished'
end