1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
module ActiveModel
module Validations
class NumericalityValidator < EachValidator # :nodoc:
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>: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.
#
# There is also a list of default options supported by every validator:
# +:if+, +:unless+, +:on+ and +: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>
#
# For example:
#
# class Person < ActiveRecord::Base
# validates_numericality_of :width, less_than: ->(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
|
