module Skr::Concerns::RandomHashCode::ClassMethods

### Random Hash Code Concern This adds the {#has_random_hash_code} class method

Public Instance Methods

has_random_hash_code( field_name: :hash_code, length: 12 ) click to toggle source

A random string that identifies an entity, such as a Customer, or Vendor The code is generated by {Skr::Strings.random} for new records It's useful for generating magic links for access to an entity that cannot be guessed. @param field_name [Symbol] which field should the hash_code be stored in @param length [Integer] how long the hash_code should be

# File lib/skr/concerns/random_hash_code.rb, line 19
def has_random_hash_code( field_name: :hash_code, length: 12 )

    validates field_name, :presence=>{
        :message=>"hash code is not set (should be automatically chosen)"
    }

    scope :with_hash_code, lambda{ | code |
        where({ :hash_code=>code })
    }

    before_validation(:on=>:create) do
        self[ field_name ] = Lanes::Strings.random( length ) if self[ field_name ].blank?
    end

end