Module: StripControlChars::ArExtend

Defined in:
lib/strip_control_chars/ar_extend.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.narrow(attributes, options) ⇒ Object

Necessary because Rails has removed the narrowing of attributes using :only and :except on Base#attributes



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# File 'lib/strip_control_chars/ar_extend.rb', line 21

def self.narrow(attributes, options)
  if options.nil?
    attributes
  else
    if except = options[:except]
      except = Array(except).collect { |attribute| attribute.to_s }
      attributes.except(*except)
    elsif only = options[:only]
      only = Array(only).collect { |attribute| attribute.to_s }
      attributes.slice(*only)
    else
      raise ArgumentError, "Options does not specify :except or :only (#{options.keys.inspect})"
    end
  end
end

Instance Method Details

#strip_control_chars!(options = nil) ⇒ Object

Strips ASCII control chars from attributes before they get saved



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# File 'lib/strip_control_chars/ar_extend.rb', line 4

def strip_control_chars!(options = nil)
  before_validation do |record|
    attributes = StripControlChars::ArExtend.narrow(record.attributes, options)
    attributes.each do |attr, value|
      if value.respond_to?(:tr)
        value = value.tr("\x00\x01\x02\x03\x04\x05\x06\x07\x08","         ")
        value = value.tr("\x0B\x0C\x0E\x0F\x10\x11\x12\x13\x14","         ")
        value = value.tr("\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D","         ")
        value = value.tr("\x1E\x1F","  ")
        record[attr] = value
      end
    end
  end
end