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Contents
module Lanes
module Concerns
# @see ClassMethods
module RandomHashCode
extend ActiveSupport::Concern
# ### Random Hash Code Concern
# This adds the {#has_random_hash_code} class method
module ClassMethods
# A random string that identifies an entity, such as a Customer, or Vendor
# The code is generated by {Lanes::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
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
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems