Question

The database is seeded with values in english language and format, e.g., :hourlyrate => 20.90. On first start (language is english by default), the input form displays the content of the field correctly. I can modify and save, no problem.
If I switch to german, the number is displayed correctly as 20,90. If I edit anything on this form, I can not save again, as the validation catches the number as not being valid.

My question is, do I have to perform corrections in my controller before saving, or did I miss some built-in function of Rails?

Relevant parts of the code

Helper:

def my_number_with_precision(value)
  if value 
    # value
    number_with_precision(value, :precision => 2)
  end  
end

Validation:

validates :hourlyrate, :numericality => { :greater_or_equal_than => 0, :message => " is an invalid number or below zero" }

Form:

<div class="input">
  <%= f.text_field :hourlyrate, :value => my_number_with_precision(f.object.hourlyrate) %>
</div>

Gemfile

gem 'rails-i18n'

Answer 1

I came up with one of the following solutions – language specific code:

def parse_i18n(value)
  if I18n.locale = 'de' 
    value.gsub(',', '.')
  else
    value
  end
end

def parse_i18n(value)
  value.gsub(I18n.t("number.currency.format.unit"),'').
        gsub(I18n.t("number.currency.format.delimiter"), '').
        gsub(I18n.t("number.currency.format.separator"), '.') 
end