Have Hanami an alternative for .present?

Question

Rails has useful present? method. How can I check the same in Hanami?

Answer 1

present? is the opposite of blank? in Ruby on Rails.

You could use Hanami::Utils::Blank:

require 'hanami/utils/blank'

Hanami::Utils::Blank.blank?(nil)     #=> true
Hanami::Utils::Blank.blank?(' ')     #=> true
Hanami::Utils::Blank.blank?('Artur') #=> false

However there are two concerns:

• blank? is not equal to Hanami::Utils::Blank.blank?
• Hanami::Utils::Blank.blank? is considered to be part of a private API

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

You could use ActiveSupport without Ruby on Rails

Active Support is a collection of utility classes and standard library extensions. It's a separate gem and you can use it independently.

You could extend Object:

class Object
  def blank?
    respond_to?(:empty?) ? !!empty? : !self
  end

  def present?
    !blank?
  end
end

And the last option

You may prefer using pure Ruby and its nil? and empty? methods if semantics is suitable.