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module DataMapper
module Validate
##
#
# @author Guy van den Berg
# @since 0.9
class AbsentFieldValidator < GenericValidator
def initialize(field_name, options={})
super
@field_name, @options = field_name, options
end
def call(target)
field_value = target.send(field_name).blank?
return true if field_value
error_message = @options[:message] || "%s must be absent".t(Extlib::Inflection.humanize(@field_name))
add_error(target, error_message , @field_name)
return false
end
end # class AbsentFieldValidator
module ValidatesAbsent
##
# Validates that the specified attribute is "blank" via the attribute's
# #blank? method.
#
# @note
# dm-core's support lib adds the #blank? method to many classes,
# @see lib/dm-core/support/blank.rb (dm-core) for more information.
#
# @example [Usage]
# require 'dm-validations'
#
# class Page
# include DataMapper::Resource
#
# property :unwanted_attribute, String
# property :another_unwanted, String
# property :yet_again, String
#
# validates_absent :unwanted_attribute
# validates_absent :another_unwanted, :yet_again
#
# # a call to valid? will return false unless
# # all three attributes are blank
# end
#
def validates_absent(*fields)
opts = opts_from_validator_args(fields)
add_validator_to_context(opts, fields, DataMapper::Validate::AbsentFieldValidator)
end
end # module ValidatesAbsent
end # module Validate
end # module DataMapper
Version data entries
11 entries across 11 versions & 2 rubygems