mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
86 lines
No EOL
4.6 KiB
Ruby
86 lines
No EOL
4.6 KiB
Ruby
module ActiveModel
|
|
module Validations
|
|
module ClassMethods
|
|
ALL_NUMERICALITY_CHECKS = { :greater_than => '>', :greater_than_or_equal_to => '>=',
|
|
:equal_to => '==', :less_than => '<', :less_than_or_equal_to => '<=',
|
|
:odd => 'odd?', :even => 'even?' }.freeze
|
|
|
|
# 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 (default is <tt>:save</tt>, other options <tt>:create</tt>, <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>: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.
|
|
def validates_numericality_of(*attr_names)
|
|
configuration = { :on => :save, :only_integer => false, :allow_nil => false }
|
|
configuration.update(attr_names.extract_options!)
|
|
|
|
numericality_options = ALL_NUMERICALITY_CHECKS.keys & configuration.keys
|
|
|
|
(numericality_options - [ :odd, :even ]).each do |option|
|
|
raise ArgumentError, ":#{option} must be a number" unless configuration[option].is_a?(Numeric)
|
|
end
|
|
|
|
validates_each(attr_names,configuration) do |record, attr_name, value|
|
|
before_type_cast = "#{attr_name}_before_type_cast"
|
|
|
|
if record.respond_to?(before_type_cast.to_sym)
|
|
raw_value = record.send("#{attr_name}_before_type_cast") || value
|
|
else
|
|
raw_value = value
|
|
end
|
|
|
|
next if configuration[:allow_nil] and raw_value.nil?
|
|
|
|
if configuration[:only_integer]
|
|
unless raw_value.to_s =~ /\A[+-]?\d+\Z/
|
|
record.errors.add(attr_name, :not_a_number, :value => raw_value, :default => configuration[:message])
|
|
next
|
|
end
|
|
raw_value = raw_value.to_i
|
|
else
|
|
begin
|
|
raw_value = Kernel.Float(raw_value)
|
|
rescue ArgumentError, TypeError
|
|
record.errors.add(attr_name, :not_a_number, :value => raw_value, :default => configuration[:message])
|
|
next
|
|
end
|
|
end
|
|
|
|
numericality_options.each do |option|
|
|
case option
|
|
when :odd, :even
|
|
unless raw_value.to_i.method(ALL_NUMERICALITY_CHECKS[option])[]
|
|
record.errors.add(attr_name, option, :value => raw_value, :default => configuration[:message])
|
|
end
|
|
else
|
|
unless raw_value.method(ALL_NUMERICALITY_CHECKS[option])[configuration[option]]
|
|
record.errors.add(attr_name, option, :default => configuration[:message], :value => raw_value, :count => configuration[option])
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end |