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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
# frozen_string_literal: true
require "bigdecimal/util"
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]
INTEGER_REGEX = /\A[+-]?\d+\z/
def check_validity!
keys = CHECKS.keys - [:odd, :even]
options.slice(*keys).each do |option, value|
unless 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
end
def validate_each(record, attr_name, value)
came_from_user = :"#{attr_name}_came_from_user?"
if record.respond_to?(came_from_user)
if record.public_send(came_from_user)
raw_value = record.read_attribute_before_type_cast(attr_name)
elsif record.respond_to?(:read_attribute)
raw_value = record.read_attribute(attr_name)
end
else
before_type_cast = :"#{attr_name}_before_type_cast"
if record.respond_to?(before_type_cast)
raw_value = record.public_send(before_type_cast)
end
end
raw_value ||= value
if record_attribute_changed_in_place?(record, attr_name)
raw_value = value
end
unless is_number?(raw_value)
record.errors.add(attr_name, :not_a_number, filtered_options(raw_value))
return
end
if allow_only_integer?(record) && !is_integer?(raw_value)
record.errors.add(attr_name, :not_an_integer, filtered_options(raw_value))
return
end
value = parse_as_number(raw_value)
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
case option_value
when Proc
option_value = option_value.call(record)
when Symbol
option_value = record.send(option_value)
end
option_value = parse_as_number(option_value)
unless value.send(CHECKS[option], option_value)
record.errors.add(attr_name, option, filtered_options(value).merge!(count: option_value))
end
end
end
end
private
def is_number?(raw_value)
!parse_as_number(raw_value).nil?
rescue ArgumentError, TypeError
false
end
def parse_as_number(raw_value)
if raw_value.is_a?(Float)
raw_value.to_d
elsif raw_value.is_a?(Numeric)
raw_value
elsif is_integer?(raw_value)
raw_value.to_i
elsif !is_hexadecimal_literal?(raw_value)
Kernel.Float(raw_value).to_d
end
end
def is_integer?(raw_value)
INTEGER_REGEX.match?(raw_value.to_s)
end
def is_hexadecimal_literal?(raw_value)
/\A0[xX]/.match?(raw_value.to_s)
end
def filtered_options(value)
filtered = options.except(*RESERVED_OPTIONS)
filtered[:value] = value
filtered
end
def allow_only_integer?(record)
case options[:only_integer]
when Symbol
record.send(options[:only_integer])
when Proc
options[:only_integer].call(record)
else
options[:only_integer]
end
end
def record_attribute_changed_in_place?(record, attr_name)
record.respond_to?(:attribute_changed_in_place?) &&
record.attribute_changed_in_place?(attr_name.to_s)
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 Integer 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+, +:allow_nil+, +:allow_blank+, and +:strict+ .
# See <tt>ActiveModel::Validations#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>
# * <tt>:only_integer</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
|
