Forum: Rails I18n Translating dynamic content

Hi all.  I have a custom validation which produces an error message with
dynamic content, like so:

  errors.add_to_base("Must have exactly #{self.size} questions for a
#{self.size}-question sequenced quiz")

Can anyone tell me the cleanest way to localise this?  I can think of
some dirty sort of ways along the lines of

  errors.add_to_base("#{I18n.t(:'quiz.errors.sequential.wrong_question_number_1')}
#{self.size}
#{I18n.t(:'quiz.errors.sequential.wrong_question_number_2')}
#{self.size}
#{I18n.t(:'quiz.errors.sequential.wrong_question_number_3')}")

But this seems nasty like i say, and also assumes that in all languages
there will be three text chunks with the size in between, which might
not be the case.  Can i somehow incorporate variables into my locale.yml
files?  or some other similar approach?

On Fri, Mar 26, 2010 at 12:12, Max Williams <lists@ruby-forum.com> 
wrote:
> Hi all.  I have a custom validation which produces an error message with
> dynamic content, like so:
>
>  errors.add_to_base("Must have exactly #{self.size} questions for a
> #{self.size}-question sequenced quiz")
>
> Can anyone tell me the cleanest way to localise this?  I can think of
> some dirty sort of ways along the lines of

You could do something like

errors.add_to_base(I18n.t(:'activerecord.errors.quiz.wrong_question_number',
:count => self.size))


with a key like

...
wrong_question_number:
 one: "Must have #{count} question"
 other: "Must have #{count} questions"

Henrik --- wrote:
> On Fri, Mar 26, 2010 at 12:12, Max Williams <lists@ruby-forum.com> 
> wrote:
>> Hi all. �I have a custom validation which produces an error message with
>> dynamic content, like so:
>>
>> �errors.add_to_base("Must have exactly #{self.size} questions for a
>> #{self.size}-question sequenced quiz")
>>
>> Can anyone tell me the cleanest way to localise this? �I can think of
>> some dirty sort of ways along the lines of
> 
> You could do something like
> 
> errors.add_to_base(I18n.t(:'activerecord.errors.quiz.wrong_question_number',
> :count => self.size))
> 
> 
> with a key like
> 
> ...
> wrong_question_number:
>  one: "Must have #{count} question"
>  other: "Must have #{count} questions"

Thanks Henrik.  So you can pass variables into the <locale>.yml file 
then?  (tries it...)

Hmm, i just get the string without the interpolation: eg, trying it with 
a simple example, just called from the view template rather than a model 
validation:

#in template
        = t(:'quiz.attributes.description', :size => "#{@quiz.size}")

#in .config/locales/en.yml
  quiz:
    attributes:
      description: "Description for your #{size} question quiz"

#rendered out
Description for your #{size} question quiz

Do i need to change my setup to enable this variable-passing?  I'm just 
using all of the basic I18n in rails 2.3.4.

thanks, max

You have to change this:
t(:'quiz.attributes.description', :size => @quiz.size)


In the view you pass the varible without direct to hash.

2010/3/26 Max Williams <lists@ruby-forum.com>

> >> some dirty sort of ways along the lines of
> > ...
>
>
> "rails-i18n" group.
> To post to this group, send email to rails-i18n@googlegroups.com.
> To unsubscribe from this group, send email to
> rails-i18n+unsubscribe@googlegroups.com<rails-i18n%2Bunsubscribe@googlegroups.com>
> .
> For more options, visit this group at
> http://groups.google.com/group/rails-i18n?hl=en.
>
>


--
Experiencia es lo que obtienes, cuando no obtienes lo que quieres.

Thanks Andres, but that gives the same result.

 = t(:'quiz.attributes.description', :size => @quiz.size)

gives

 Description for your #{size} question quiz

Surely it wouldn't make any difference anyway?  The string interpolation 
would happen before the t method is called, right?  So it would just be 
like passing a string through.  And if it can take integers dynamically 
then surely it can take strings dynamically.  Seems my problem is that 
it's not taking anything dynamically.

Solved it:  This part of the I18n documentation showed me how:
http://guides.rubyonrails.org/i18n.html#interpolation

The problem was the syntax for string interpolation in the <locale>.yml 
file.  You *don't* do this:

      description: "Description for your #{size} question quiz"

But instead, do this:

      description: "Description for your {{size}} question quiz"

Thanks all.  Max

On Fri, Mar 26, 2010 at 14:46, Max Williams <lists@ruby-forum.com> 
wrote:
>      description: "Description for your {{size}} question quiz"
Oops, yeah, I should have added an "off the top of my head" :) Stupid
mistake on my part. Glad you got it working!

Henrik --- wrote:
> On Fri, Mar 26, 2010 at 14:46, Max Williams <lists@ruby-forum.com> 
> wrote:
>> � � �description: "Description for your {{size}} question quiz"
> Oops, yeah, I should have added an "off the top of my head" :) Stupid
> mistake on my part. Glad you got it working!

No worries, cheers :)