104 lines
4.3 KiB
Ruby
104 lines
4.3 KiB
Ruby
# Extracted from dm-validations 0.9.10
|
|
#
|
|
# Copyright (c) 2007 Guy van den Berg
|
|
#
|
|
# Permission is hereby granted, free of charge, to any person obtaining
|
|
# a copy of this software and associated documentation files (the
|
|
# "Software"), to deal in the Software without restriction, including
|
|
# without limitation the rights to use, copy, modify, merge, publish,
|
|
# distribute, sublicense, and/or sell copies of the Software, and to
|
|
# permit persons to whom the Software is furnished to do so, subject to
|
|
# the following conditions:
|
|
#
|
|
# The above copyright notice and this permission notice shall be
|
|
# included in all copies or substantial portions of the Software.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
module CouchRest
|
|
module Validation
|
|
|
|
##
|
|
#
|
|
# @author Guy van den Berg
|
|
# @since 0.9
|
|
class NumericValidator < GenericValidator
|
|
|
|
def initialize(field_name, options={})
|
|
super
|
|
@field_name, @options = field_name, options
|
|
@options[:integer_only] = false unless @options.has_key?(:integer_only)
|
|
end
|
|
|
|
def call(target)
|
|
value = target.send(field_name)
|
|
return true if @options[:allow_nil] && value.nil?
|
|
|
|
value = value.kind_of?(Float) ? value.to_s('F') : value.to_s
|
|
|
|
error_message = @options[:message]
|
|
precision = @options[:precision]
|
|
scale = @options[:scale]
|
|
|
|
if @options[:integer_only]
|
|
return true if value =~ /\A[+-]?\d+\z/
|
|
error_message ||= ValidationErrors.default_error_message(:not_an_integer, field_name)
|
|
else
|
|
# FIXME: if precision and scale are not specified, can we assume that it is an integer?
|
|
# probably not, as floating point numbers don't have hard
|
|
# defined scale. the scale floats with the length of the
|
|
# integral and precision. Ie. if precision = 10 and integral
|
|
# portion of the number is 9834 (4 digits), the max scale will
|
|
# be 6 (10 - 4). But if the integral length is 1, max scale
|
|
# will be (10 - 1) = 9, so 1.234567890.
|
|
if precision && scale
|
|
#handles both Float when it has scale specified and BigDecimal
|
|
if precision > scale && scale > 0
|
|
return true if value =~ /\A[+-]?(?:\d{1,#{precision - scale}}|\d{0,#{precision - scale}}\.\d{1,#{scale}})\z/
|
|
elsif precision > scale && scale == 0
|
|
return true if value =~ /\A[+-]?(?:\d{1,#{precision}}(?:\.0)?)\z/
|
|
elsif precision == scale
|
|
return true if value =~ /\A[+-]?(?:0(?:\.\d{1,#{scale}})?)\z/
|
|
else
|
|
raise ArgumentError, "Invalid precision #{precision.inspect} and scale #{scale.inspect} for #{field_name} (value: #{value.inspect} #{value.class})"
|
|
end
|
|
elsif precision && scale.nil?
|
|
# for floats, if scale is not set
|
|
|
|
#total number of digits is less or equal precision
|
|
return true if value.gsub(/[^\d]/, '').length <= precision
|
|
|
|
#number of digits before decimal == precision, and the number is x.0. same as scale = 0
|
|
return true if value =~ /\A[+-]?(?:\d{1,#{precision}}(?:\.0)?)\z/
|
|
else
|
|
return true if value =~ /\A[+-]?(?:\d+|\d*\.\d+)\z/
|
|
end
|
|
error_message ||= ValidationErrors.default_error_message(:not_a_number, field_name)
|
|
end
|
|
|
|
add_error(target, error_message, field_name)
|
|
|
|
# TODO: check the gt, gte, lt, lte, and eq options
|
|
|
|
return false
|
|
end
|
|
end # class NumericValidator
|
|
|
|
module ValidatesIsNumber
|
|
|
|
# Validate whether a field is numeric
|
|
#
|
|
def validates_is_number(*fields)
|
|
opts = opts_from_validator_args(fields)
|
|
add_validator_to_context(opts, fields, CouchRest::Validation::NumericValidator)
|
|
end
|
|
|
|
end # module ValidatesIsNumber
|
|
end # module Validation
|
|
end # module CouchRest
|