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# File 'dm-more/dm-validations/lib/dm-validations/auto_validate.rb', line 36

def auto_generate_validations(property)
  property.options[:auto_validation] = true unless property.options.has_key?(:auto_validation)
  return unless property.options[:auto_validation]

  # a serial property is allowed to be nil too, because the
  # value is set by the storage system
  opts = { :allow_nil => property.nullable? || property.serial? }
  opts[:context] = property.options[:validates] if property.options.has_key?(:validates)

  # presence
  unless opts[:allow_nil]




    validates_present property.name, opts
  end

  # length
  if property.type == String




    #len = property.length  # XXX: maybe length should always return a Range, with the min defaulting to 1
    len = property.options.fetch(:length, property.options.fetch(:size, DataMapper::Property::DEFAULT_LENGTH))
    if len.is_a?(Range)




      opts[:within] = len
    else
      opts[:maximum] = len
    end
    validates_length property.name, opts
  end

  # format
  if property.options.has_key?(:format)




    opts[:with] = property.options[:format]
    validates_format property.name, opts
  end

  # uniqueness validator
  if property.options.has_key?(:unique)




    value = property.options[:unique]
    scope = []
    scope.concat(value) if value.is_a?(Array)
    scope << value if value.is_a?(Symbol)
    opts = {}
    opts[:scope] = scope if scope.length > 0

    if value.is_a?(TrueClass) || scope.length > 0




      validates_is_unique property.name, opts
    end
  end

  # numeric validator
  if Integer == property.type




    opts[:integer_only] = true
    validates_is_number property.name, opts
  elsif BigDecimal == property.type || Float == property.type
    opts[:precision] = property.precision
    opts[:scale]     = property.scale
    validates_is_number property.name, opts
  end
end