132 lines
5.8 KiB
Ruby
132 lines
5.8 KiB
Ruby
module ActiveModel
|
|
|
|
# == Active Model Numericality Validator
|
|
module Validations
|
|
class NumericalityValidator < EachValidator
|
|
CHECKS = { :greater_than => :>, :greater_than_or_equal_to => :>=,
|
|
:equal_to => :==, :less_than => :<, :less_than_or_equal_to => :<=,
|
|
:odd => :odd?, :even => :even?, :other_than => :!= }.freeze
|
|
|
|
RESERVED_OPTIONS = CHECKS.keys + [:only_integer]
|
|
|
|
def check_validity!
|
|
keys = CHECKS.keys - [:odd, :even]
|
|
options.slice(*keys).each do |option, value|
|
|
next if value.is_a?(Numeric) || value.is_a?(Proc) || value.is_a?(Symbol)
|
|
raise ArgumentError, ":#{option} must be a number, a symbol or a proc"
|
|
end
|
|
end
|
|
|
|
def validate_each(record, attr_name, value)
|
|
before_type_cast = "#{attr_name}_before_type_cast"
|
|
|
|
raw_value = record.send(before_type_cast) if record.respond_to?(before_type_cast.to_sym)
|
|
raw_value ||= value
|
|
|
|
return if options[:allow_nil] && raw_value.nil?
|
|
|
|
unless value = parse_raw_value_as_a_number(raw_value)
|
|
record.errors.add(attr_name, :not_a_number, filtered_options(raw_value))
|
|
return
|
|
end
|
|
|
|
if options[:only_integer]
|
|
unless value = parse_raw_value_as_an_integer(raw_value)
|
|
record.errors.add(attr_name, :not_an_integer, filtered_options(raw_value))
|
|
return
|
|
end
|
|
end
|
|
|
|
options.slice(*CHECKS.keys).each do |option, option_value|
|
|
case option
|
|
when :odd, :even
|
|
unless value.to_i.send(CHECKS[option])
|
|
record.errors.add(attr_name, option, filtered_options(value))
|
|
end
|
|
else
|
|
option_value = option_value.call(record) if option_value.is_a?(Proc)
|
|
option_value = record.send(option_value) if option_value.is_a?(Symbol)
|
|
|
|
unless value.send(CHECKS[option], option_value)
|
|
record.errors.add(attr_name, option, filtered_options(value).merge(:count => option_value))
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
protected
|
|
|
|
def parse_raw_value_as_a_number(raw_value)
|
|
case raw_value
|
|
when /\A0[xX]/
|
|
nil
|
|
else
|
|
begin
|
|
Kernel.Float(raw_value)
|
|
rescue ArgumentError, TypeError
|
|
nil
|
|
end
|
|
end
|
|
end
|
|
|
|
def parse_raw_value_as_an_integer(raw_value)
|
|
raw_value.to_i if raw_value.to_s =~ /\A[+-]?\d+\Z/
|
|
end
|
|
|
|
def filtered_options(value)
|
|
options.except(*RESERVED_OPTIONS).merge!(:value => value)
|
|
end
|
|
end
|
|
|
|
module HelperMethods
|
|
# Validates whether the value of the specified attribute is numeric by trying to convert it to
|
|
# a float with Kernel.Float (if <tt>only_integer</tt> is false) or applying it to the regular expression
|
|
# <tt>/\A[\+\-]?\d+\Z/</tt> (if <tt>only_integer</tt> is set to true).
|
|
#
|
|
# class Person < ActiveRecord::Base
|
|
# validates_numericality_of :value, :on => :create
|
|
# end
|
|
#
|
|
# Configuration options:
|
|
# * <tt>:message</tt> - A custom error message (default is: "is not a number").
|
|
# * <tt>:on</tt> - Specifies when this validation is active. Runs in all
|
|
# validation contexts by default (+nil+), other options are <tt>:create</tt>
|
|
# and <tt>:update</tt>.
|
|
# * <tt>:only_integer</tt> - Specifies whether the value has to be an integer, e.g. an integral value (default is +false+).
|
|
# * <tt>:allow_nil</tt> - Skip validation if attribute is +nil+ (default is +false+). Notice that for fixnum and float columns empty strings are converted to +nil+.
|
|
# * <tt>:greater_than</tt> - Specifies the value must be greater than the supplied value.
|
|
# * <tt>:greater_than_or_equal_to</tt> - Specifies the value must be greater than or equal the supplied value.
|
|
# * <tt>:equal_to</tt> - Specifies the value must be equal to the supplied value.
|
|
# * <tt>:less_than</tt> - Specifies the value must be less than the supplied value.
|
|
# * <tt>:less_than_or_equal_to</tt> - Specifies the value must be less than or equal the supplied value.
|
|
# * <tt>:other_than</tt> - Specifies the value must be other than the supplied value.
|
|
# * <tt>:odd</tt> - Specifies the value must be an odd number.
|
|
# * <tt>:even</tt> - Specifies the value must be an even number.
|
|
# * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
|
|
# occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
|
|
# method, proc or string should return or evaluate to a true or false value.
|
|
# * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
|
|
# not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
|
|
# method, proc or string should return or evaluate to a true or false value.
|
|
# * <tt>:strict</tt> - Specifies whether validation should be strict.
|
|
# See <tt>ActiveModel::Validation#validates!</tt> for more information
|
|
#
|
|
# The following checks can also be supplied with a proc or a symbol which corresponds to a method:
|
|
# * <tt>:greater_than</tt>
|
|
# * <tt>:greater_than_or_equal_to</tt>
|
|
# * <tt>:equal_to</tt>
|
|
# * <tt>:less_than</tt>
|
|
# * <tt>:less_than_or_equal_to</tt>
|
|
#
|
|
# class Person < ActiveRecord::Base
|
|
# validates_numericality_of :width, :less_than => Proc.new { |person| person.height }
|
|
# validates_numericality_of :width, :greater_than => :minimum_weight
|
|
# end
|
|
#
|
|
def validates_numericality_of(*attr_names)
|
|
validates_with NumericalityValidator, _merge_attributes(attr_names)
|
|
end
|
|
end
|
|
end
|
|
end
|