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Contents
# frozen_string_literal: true
module ActiveModel
module Type
module Helpers # :nodoc: all
module Numeric
def serialize(value)
cast(value)
end
def serialize_cast_value(value)
value
end
def cast(value)
# Checks whether the value is numeric. Spaceship operator
# will return nil if value is not numeric.
value = if value <=> 0
value
else
case value
when true then 1
when false then 0
else value.presence
end
end
super(value)
end
def changed?(old_value, _new_value, new_value_before_type_cast) # :nodoc:
(super || number_to_non_number?(old_value, new_value_before_type_cast)) &&
!equal_nan?(old_value, new_value_before_type_cast)
end
private
def equal_nan?(old_value, new_value)
(old_value.is_a?(::Float) || old_value.is_a?(BigDecimal)) &&
old_value.nan? &&
old_value.instance_of?(new_value.class) &&
new_value.nan?
end
def number_to_non_number?(old_value, new_value_before_type_cast)
old_value != nil && !new_value_before_type_cast.is_a?(::Numeric) &&
non_numeric_string?(new_value_before_type_cast.to_s)
end
def non_numeric_string?(value)
# 'wibble'.to_i will give zero, we want to make sure
# that we aren't marking int zero to string zero as
# changed.
!NUMERIC_REGEX.match?(value)
end
NUMERIC_REGEX = /\A\s*[+-]?\d/
private_constant :NUMERIC_REGEX
end
end
end
end
Version data entries
38 entries across 38 versions & 6 rubygems