Module: Hippo::Concerns::RandomIdentifer::ClassMethods

Defined in:
lib/hippo/concerns/random_identifier.rb

Overview

### Random Identifier Concern This adds the #has_random_hash_code class method

Instance Method Summary collapse

Instance Method Details

#has_random_identifier(field_name: :identifier, length: 12) ⇒ Object

A random string that identifies an model The code is generated by Strings.random for new records It's useful for generating links for anonymous access to an entity that cannot be guessed.

Parameters:

  • field_name (Symbol) (defaults to: :identifier)

    which field should the hash_code be stored in

  • length (Integer) (defaults to: 12)

    how long the hash_code should be


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# File 'lib/hippo/concerns/random_identifier.rb', line 18

def has_random_identifier(field_name: :identifier, length: 12)

    validates field_name,
              presence: {
                  message: "random identifier is not set (should be automatically chosen)"
              }

    before_validation(on: :create) do
        5.times do
            if self[field_name].blank?
                code = Hippo::Strings.random(length)
                self[field_name] = code if self.class.where("#{field_name}" => code).none?
            end
            break if self[field_name].present?
        end
    end
end