Feedback on http://t.co/sFZYBp08bV - Sorry for being such an advocate for tap :)

gistfile1.rb

def call(form_object)
  form_object.validate!

  if User.where(email: form_object.email).exists?
    form_object.errros.add(:email, 'email already taken')
  end

  # Forgot to access the company_name attribute on the form_object
  company = Company.create!(name: form_object.company_name)
  User.create!(name: form_object.name, email: form_object.email, company: company)

  form_object
rescue form_object.class::ValidationError
  form_object # we have errors here
rescue ActiveRecord::RecordInvalid => e
  # add additional errors to form object
end

#-- VS ----------------------------------------------------------------

def call(form_object)
  form_object.tap do |this|
    this.validate!

    if User.where(email: this.email).exists?
      this.errros.add(:email, 'email already taken')
    end

    User.create!({
      name: this.name,
      email: this.email,
      company: Company.create!({
        name: this.company_name
      })
    })
  end
rescue form_object.class::ValidationError
  form_object # we have errors here
rescue ActiveRecord::RecordInvalid => e
  # add additional errors to form object
end