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require 'whyvalidationssuckin96/skippable_validation'
require 'whyvalidationssuckin96/attribute_based_validation'
module WhyValidationsSuckIn96
# Checks to see if a given attribute is a valid numerical value. Allows a certain degree of latitude in determining
# what is a valid numerical value, like allowing commas and spaces in the value for example.
#
# @example Default usage
# setup_validations do
# validates_numericality_of :cost
# end
#
# @example Only allow integer values
# setup_validations do
# validates_numericality_of :cost, :only_integer => true
# end
class ValidatesNumericality < Validation
include WhyValidationsSuckIn96::SkippableValidation
include WhyValidationsSuckIn96::AttributeBasedValidation
DefaultOptions = {:message => "is not a numerical value"}
StripNonNumeric = /[^-+e\d.]/im
ValidNumericChars = /\A[-+e\d.,\s]+\Z/im
def validate
super
if options[:only_integer]
validate_as_integer
else
validate_as_float
end
end
private
def validate_as_integer
fail if attribute_value.to_s !~ ValidNumericChars
Integer(attribute_value.to_s.gsub(StripNonNumeric, ""))
pass
rescue ArgumentError, TypeError
fail
end
def validate_as_float
fail if attribute_value.to_s !~ ValidNumericChars
Kernel.Float(attribute_value.to_s.gsub(StripNonNumeric, ""))
pass
rescue ArgumentError, TypeError
fail
end
end # Validation
ValidationBuilder.register_macro :validates_numericality_of, WhyValidationsSuckIn96::ValidatesNumericality
end # WhyValidationsSuckIn96
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20 entries across 20 versions & 1 rubygems