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module Hippo::Concerns
# @see ClassMethods
module RandomIdentifer
extend ActiveSupport::Concern
# ### Random Identifier Concern
# This adds the {#has_random_hash_code} class method
module ClassMethods
# A random string that identifies an model
# The code is generated by {Hippo::Strings.random} for new records
# It's useful for generating links for anonymous 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
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
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems