tree.sh

app/models/
├── user
│   ├── activation.rb
│   ├── authentication.rb
│   ├── avatar.rb
│   ├── recent_projects.rb
│   ├── roles.rb
│   ├── rss.rb
│   ├── scopes.rb
│   └── validation.rb
├── user.rb

validation.rb

  class User

  validates_presence_of     :login
  validates_length_of       :login,       :within => 3..40
  validates_uniqueness_of   :login,       :case_sensitive => false
  validates_format_of       :login,       :with => Authentication.login_regex, :message => I18n.t("users.form.invalid_login")
  validates_exclusion_of    :login,       :in => RESERVED_USERNAMES

  def before_validate
    [self.email, self.login, self.first_name, self.last_name].strip!
  end

  # More validation related logic...

end