Class: ActiveModel::Validations::MustBeValidator

Inherits:
EachValidator
  • Object
show all
Defined in:
lib/validators/must_be_validator.rb

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

MATCHERS = 
{
  equal_to: :==,
  greater_than: :>,
  greater_or_equal_to: :>=,
  less_than: :<,
  less_or_equal_to: :<=,
  not_equal_to: :!=,
  matching: :=~,
}.freeze
REQD_OPTS = 
(MATCHERS.keys + [:blank, :present, :one_of, :not_any_of, :only_from, :before, :after])
MESSAGE_PREFIX = 
"must be"
ERRORS_METHOD = 
:errors

Instance Method Summary collapse

Instance Method Details

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/validators/must_be_validator.rb', line 21

def validate_each(record, attribute, value) 
  raise "Requires at least one comparison operator for attribute." unless (options.keys & REQD_OPTS).length > 0
  return if options[:rule_name] && BeValid.config.rules&.fetch(options[:rule_name], {})[:disabled]

  original_value = value
  original_value = record.read_attribute_before_type_cast( attribute ) rescue nil # only in rails

  message = self.class::MESSAGE_PREFIX.dup

  return if options[:blank] && value.blank?
  message << " blank" if options[:blank]

  return if options[:present] && value.present?
  message << " present" if options[:present]

  return if options[:one_of] && Array(options[:one_of]).flatten.include?(value)
  message = ": '#{value}' is not a valid value" if options[:one_of]

  return if options[:not_any_of] && !(options[:not_any_of].include?(value))
  message = ": '#{value}' is not a valid value" if options[:not_any_of]

  return if options[:only_from] && (options[:only_from] & Array(value) == Array(value))
  message = ": #{Array(value).join(",").gsub('"', '\'')} is not a valid value" if options[:only_from]

  # handle before and after date comparisons using date validator
  if options[:before] 
    before_resp = DateValidator.new(options.merge(attributes: attributes)).validate_before_option(record, attribute, value, original_value)
    return if before_resp == true
    message = before_resp
  end
  if options[:after] 
    after_resp = DateValidator.new(options.merge(attributes: attributes)).validate_after_option(record, attribute, value, original_value)
    return if after_resp == true
    message = after_resp
  end

  options.slice(*MATCHERS.keys).each do |key, operand|
    operand_msg = operand.is_a?(Regexp) ? operand.inspect : operand.to_s
    operand = record.send(operand) if operand.is_a? Symbol
    return if operand.nil?
    return if value&.send(MATCHERS[key], operand)
    return if key == :not_equal_to && value != operand
    message << " #{key.to_s.humanize(capitalize: false)} #{operand_msg}"
  end

  if options[:when].present?
    # check if conditions to validate satisfied
    conditions = options[:when]
    raise "Invalid :when option provided to must_be, must be a Hash or method" unless (conditions.is_a? Hash || conditions.is_a?(Method))
    # add error message with predicate info
    message << " when "
    condition_errors = []
    conditions.each do |field, values|
      field_value = record.send(field)
      case values
      when Regexp
        return if !values.match?(field_value)
        condition_errors << "#{field} = #{field_value}"
      when Array
        return if !values.flatten.include?(field_value)
        condition_errors << "#{field} = #{field_value}"
      when :blank
        return unless record.send(field).blank?
        condition_errors << "#{field} is #{values.to_s.gsub('?', '')}"
      when :present
        return unless record.send(field).present?
        condition_errors << "#{field} is #{values.to_s.gsub('?', '')}"
      when Symbol
        return if !record.send(field)&.send(values)
        condition_errors << "#{field} is #{values.to_s.gsub('?', '')}"
      else
        return if values != field_value
        condition_errors << "#{field} = #{field_value}"
      end
    end
    message << condition_errors.join(' and ')
  end

  if options[:one_of] && options.fetch(:show_values, true)
    message << ". Valid values: #{options[:one_of].join(', ')}"
  end
  if options[:only_from] && options.fetch(:show_values, true)
    message << ". Valid values: #{options[:only_from].join(', ')}"
  end
  if options[:not_any_of] && options.fetch(:show_values, true)
    message << ". Invalid values: #{options[:not_any_of].join(', ')}"
  end

  record.send(self.class::ERRORS_METHOD).add(attribute, (options[:message] || "#{message}."), rule_name: options[:rule_name])
end