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Contents
module Hashie
module Extensions
# IgnoreUndeclared is a simple mixin that silently ignores
# undeclared properties on initialization instead of
# raising an error. This is useful when using a Trash to
# capture a subset of a larger hash.
#
# Note that attempting to retrieve or set an undeclared property
# will still raise a NoMethodError, even if a value for
# that property was provided at initialization.
#
# @example
# class Person < Trash
# include Hashie::Extensions::IgnoreUndeclared
#
# property :first_name
# property :last_name
# end
#
# user_data = {
# :first_name => 'Freddy',
# :last_name => 'Nostrils',
# :email => 'freddy@example.com'
# }
#
# p = Person.new(user_data) # 'email' is silently ignored
#
# p.first_name # => 'Freddy'
# p.last_name # => 'Nostrils'
# p.email # => NoMethodError
module IgnoreUndeclared
def initialize_attributes(attributes)
return unless attributes
klass = self.class
translations = klass.respond_to?(:translations) && klass.translations
attributes.each_pair do |att, value|
next unless klass.property?(att) || (translations && translations.include?(att))
self[att] = value
end
end
def property_exists?(property)
self.class.property?(property)
end
end
end
end
Version data entries
21 entries across 20 versions & 4 rubygems