Class ActiveModel::Validations::LengthValidator < EachValidator

    # File activemodel/lib/active_model/validations/length.rb, line 12
12:       def initialize(options)
13:         if range = (options.delete(:in) || options.delete(:within))
14:           raise ArgumentError, ":in and :within must be a Range" unless range.is_a?(Range)
15:           options[:minimum], options[:maximum] = range.begin, range.end
16:           options[:maximum] -= 1 if range.exclude_end?
17:         end
18: 
19:         super
20:       end

    # File activemodel/lib/active_model/validations/length.rb, line 22
22:       def check_validity!
23:         keys = CHECKS.keys & options.keys
24: 
25:         if keys.empty?
26:           raise ArgumentError, 'Range unspecified. Specify the :in, :within, :maximum, :minimum, or :is option.'
27:         end
28: 
29:         keys.each do |key|
30:           value = options[key]
31: 
32:           unless value.is_a?(Integer) && value >= 0
33:             raise ArgumentError, ":#{key} must be a nonnegative Integer"
34:           end
35:         end
36:       end

    # File activemodel/lib/active_model/validations/length.rb, line 38
38:       def validate_each(record, attribute, value)
39:         value = tokenize(value)
40:         value_length = value.respond_to?(:length) ? value.length : value.to_s.length
41: 
42:         CHECKS.each do |key, validity_check|
43:           next unless check_value = options[key]
44:           next if value_length.send(validity_check, check_value)
45: 
46:           errors_options = options.except(*RESERVED_OPTIONS)
47:           errors_options[:count] = check_value
48: 
49:           default_message = options[MESSAGES[key]]
50:           errors_options[:message] ||= default_message if default_message
51: 
52:           record.errors.add(attribute, MESSAGES[key], errors_options)
53:         end
54:       end