method

number_to_human_size

v3.2.13 - Show latest stable - 0 notes - Class: ActionView::Helpers::NumberHelper

number_to_human_size(number, options = {}) public

Formats the bytes in number into a more understandable representation (e.g., giving it 1500 yields 1.5 KB). This method is useful for reporting file sizes to users. You can customize the format in the options hash.

See number_to_human if you want to pretty-print a generic number.

Options

:locale - Sets the locale to be used for formatting (defaults to current locale).
:precision - Sets the precision of the number (defaults to 3).
:significant - If true, precision will be the # of significant_digits. If false, the # of fractional digits (defaults to true)
:separator - Sets the separator between the fractional and integer digits (defaults to “.”).
:delimiter - Sets the thousands delimiter (defaults to “”).
:strip_insignificant_zeros - If true removes insignificant zeros after the decimal separator (defaults to true)
:prefix - If :si formats the number using the SI prefix (defaults to :binary)
:raise - If true, raises InvalidNumberError when the argument is invalid.

Examples

number_to_human_size(123)                                          # => 123 Bytes
number_to_human_size(1234)                                         # => 1.21 KB
number_to_human_size(12345)                                        # => 12.1 KB
number_to_human_size(1234567)                                      # => 1.18 MB
number_to_human_size(1234567890)                                   # => 1.15 GB
number_to_human_size(1234567890123)                                # => 1.12 TB
number_to_human_size(1234567, :precision => 2)                     # => 1.2 MB
number_to_human_size(483989, :precision => 2)                      # => 470 KB
number_to_human_size(1234567, :precision => 2, :separator => ',')  # => 1,2 MB

Non-significant zeros after the fractional separator are stripped out by default (set :strip_insignificant_zeros to false to change that):

number_to_human_size(1234567890123, :precision => 5)        # => "1.1229 TB"
number_to_human_size(524288000, :precision => 5)            # => "500 MB"

Show source

# File actionpack/lib/action_view/helpers/number_helper.rb, line 411
      def number_to_human_size(number, options = {})
        options.symbolize_keys!

        number = begin
          Float(number)
        rescue ArgumentError, TypeError
          if options[:raise]
            raise InvalidNumberError, number
          else
            return number
          end
        end

        defaults = I18n.translate(:'number.format', :locale => options[:locale], :default => {})
        human    = I18n.translate(:'number.human.format', :locale => options[:locale], :default => {})
        defaults = defaults.merge(human)

        options = options.reverse_merge(defaults)
        #for backwards compatibility with those that didn't add strip_insignificant_zeros to their locale files
        options[:strip_insignificant_zeros] = true if not options.key?(:strip_insignificant_zeros)

        storage_units_format = I18n.translate(:'number.human.storage_units.format', :locale => options[:locale], :raise => true)

        base = options[:prefix] == :si ? 1000 : 1024

        if number.to_i < base
          unit = I18n.translate(:'number.human.storage_units.units.byte', :locale => options[:locale], :count => number.to_i, :raise => true)
          storage_units_format.gsub(/%n/, number.to_i.to_s).gsub(/%u/, unit).html_safe
        else
          max_exp  = STORAGE_UNITS.size - 1
          exponent = (Math.log(number) / Math.log(base)).to_i # Convert to base
          exponent = max_exp if exponent > max_exp # we need this to avoid overflow for the highest unit
          number  /= base ** exponent

          unit_key = STORAGE_UNITS[exponent]
          unit = I18n.translate(:"number.human.storage_units.units.#{unit_key}", :locale => options[:locale], :count => number, :raise => true)

          formatted_number = number_with_precision(number, options)
          storage_units_format.gsub(/%n/, formatted_number).gsub(/%u/, unit).html_safe
        end
      end

number_to_human_size

Related methods

Options

Examples