method

number_to_currency

v1.0.0 - Show latest stable - 6 notes - Class: ActionView::Helpers::NumberHelper

number_to_currency(number, options = {}) public

Formats a number into a currency string. The options hash can be used to customize the format of the output. The number can contain a level of precision using the precision key; default is 2 The currency type can be set using the unit key; default is "$" The unit separator can be set using the separator key; default is "." The delimiter can be set using the delimiter key; default is "," Examples:

   number_to_currency(1234567890.50)     => $1,234,567,890.50
   number_to_currency(1234567890.506)    => $1,234,567,890.51
   number_to_currency(1234567890.50, {:unit => "&pound;", :separator => ",", :delimiter => ""}) => &pound;1234567890,50

Show source

# File actionpack/lib/action_view/helpers/number_helper.rb, line 37
      def number_to_currency(number, options = {})
        options = options.stringify_keys
        precision, unit, separator, delimiter = options.delete("precision") { 2 }, options.delete("unit") { "$" }, options.delete("separator") { "." }, options.delete("delimiter") { "," }
        separator = "" unless precision > 0
        begin
          parts = number_with_precision(number, precision).split('.')
          unit + number_with_delimiter(parts[0], delimiter) + separator + parts[1].to_s
        rescue
          number
        end
      end

August 29, 2008

6 thanks

Brazilian Real (R$ 1.200,95)

helper:

def number_to_currency_br(number)
  number_to_currency(number, :unit => "R$ ", :separator => ",", :delimiter => ".")
end

October 20, 2008

3 thanks

number_to_euro

in small cells:

12  
€
-->
12 €

def number_to_euro(amount)
  number_to_currency(amount,:unit=>'€').gsub(' ',nbsp)
end

January 15, 2010

3 thanks

Use this in controllers

Sometimes you’re gonna need this in controllers. Just put this in the controller:

include ActionView::Helpers::NumberHelper

October 4, 2011

2 thanks

How to change format automatically depending on locale...

… without passing locale option.

In your application_helper.rb (or in other helper) place following code:

def number_to_currency(number, options = {})
  options[:locale] ||= I18n.locale
  super(number, options)
end

Then, in your locale files:

en-GB:
  number:
    currency:
      format:
        format: "%n %u"
        unit: "USD"

And that is it :)

November 19, 2014

1 thank

Bangladeshi Taka (BDT 1,200.95)

Code example

def to_bdt(amount)
  number_to_currency(amount, :unit => "BDT ", :separator => ".", :delimiter => ",")
end

October 24, 2012

0 thanks

If you happen to face some weird rounding issue...

i.e.

helper.number_to_currency(187)
=> "190 kr"

check out your… translations! Especially ‘significant’ key… In my case it was

number:
   currency:
     format:
       significant: 'false'

that broke rounding. It should have been

number:
   currency:
     format:
       significant: ! 'false'

And now it works perfectly

helper.number_to_currency(187)
=> "187 kr"