Hello,
Let’s put it simple. The problem is that to_param generates URLS
according to the current language.
Suppose my current locale is ‘nl’ and I’m currently viewing an article
with this URL :
http://cms/nl/articles/86-wandeling-op-maat-
On this page I need localized URLS for each language for this page.
so if I generate an URLS like this (using the “translate routes” plugin)
:
url_for(params.merge(:locale=>‘de’))
url_for(params.merge(:locale=>‘en’))
I get this result :
http://cms/de/articles/86-wandeling-op-maat-
http://cms/en/articles/86-wandeling-op-maat-
The links will direct my to the right page, but I can’t figure out how
to translate the
to_params part ! The article id is correct but the last part should also
be translated
like this :
http://cms/de/articles/86-wanderung-nach-mass-
http://cms/en/articles/86-hiking-tour-to-measure-
In the article model, my to_param looks like this:
def to_param
“#{id}-#{title($activelanguage.code).downcase.gsub(/[^[:alnum:]]/,‘-’)}”.gsub(/-{2,}/,‘-’)
end
When the links are generated by url_for, the $activelanguage (=locale)
is of course ‘nl’ (=current language) . Is there a way to make url_for
pass it’s parameters to to_param ?
Any help would be appreciated
Hi,
I18n should know the current locale throughout the request, so there
should be no need to use a global variable.
You could do this:
def to_param
“#{id}-#{title(I18n.locale).downcase.gsub(/[^[:alnum:]]/,‘-’)}”.gsub(/-{2,}/,‘-’)
end
But passing I18n.locale to the title-method seems a bit odd, since it
is available there as well.
Hope this helps,
Iain
Iain H. wrote:
Hi,
I18n should know the current locale throughout the request, so there
should be no need to use a global variable.
You could do this:
def to_param
“#{id}-#{title(I18n.locale).downcase.gsub(/[^[:alnum:]]/,‘-’)}”.gsub(/-{2,}/,‘-’)
end
But passing I18n.locale to the title-method seems a bit odd, since it
is available there as well.
Hope this helps,
Iain
http://iain.nl/
Hi Lian,
the thing about the global variable isn’t the issue. I’m just storing
the language record in a variable
for global use in my CMS. I have e-mail the creator of the translate
routes plugin, and he suggests
the following:
You may need to set your
locale before generating each link:
def i18n_link_for(resource, locale)
current_i18n = I18n.locale
I18n.locale = locale
link = url_for(…) # now your model should use I18n.locale to set
the correct text
I18n.locale = current_i18n
link
end
It’s an improvised and untested code, but I think you can see the point.
I still have to test it
Hi Maarten,
You should set I18n.locale on every request. This is what my
application controller usually looks like:
before_filter :set_locale
def set_locale
I18n.locale = params[:locale]
end
I don’t know where your locale comes from. I use the params, but it
could also come from the session (although that’s not really RESTful).
This way every request has it’s own locale.
Iain
Let’s give some more random advice, hoping that one of these tips is
the one you need 
When I make a link to the same page in another locale I use a hash as
url parameter:
link_to “English”, :locale => :en
link_to “Dutch”, :locale => :nl
As for translating multiple times, you can pass the locale option to
the translate method:
I18n.t(:foo, :locale => :jp)
Also, there is no reason as far as I’m aware of that prohibits setting
I18n.locale multiple times during a request
Hope the right advice is in here
PS. my name is “iain” not “Lian”
Iain H. wrote:
Hi Maarten,
You should set I18n.locale on every request. This is what my
application controller usually looks like:
before_filter :set_locale
def set_locale
I18n.locale = params[:locale]
end
I don’t know where your locale comes from. I use the params, but it
could also come from the session (although that’s not really RESTful).
This way every request has it’s own locale.
Iain
Lian,
of course the locale is set every request … But it’s not solving the
problem if you are on page X,
and need links to the same page, translated in every language. Then you
have to change the locale
before generating each link. And then reset the locale back to the
current locale.
However the suggested solution by Raul (translate routes author) does
not work ! It seems like you can’t change the locale multiple times per
request.
Iain H. wrote:
Let’s give some more random advice, hoping that one of these tips is
the one you need
When I make a link to the same page in another locale I use a hash as
url parameter:
link_to “English”, :locale => :en
link_to “Dutch”, :locale => :nl
As for translating multiple times, you can pass the locale option to
the translate method:
I18n.t(:foo, :locale => :jp)
Also, there is no reason as far as I’m aware of that prohibits setting
I18n.locale multiple times during a request
Hope the right advice is in here
PS. my name is “iain” not “Lian”
Hi Iain,
thanks for the advice but I don’t think you understand the problem.
Passing the locale
param to link_to generates indeed urls to translated pages. But
I18n.locale always remains
the same in to_param method of the model. So the article titles are not
translated in the URL,
they remain the same. It works but you end up with multiple urls to the
same page, which is
bad 
Any luck yet in solving this one?
I’v got the same problem and have been googling around but haven’t found
a solution.
Hi,
The solution given by the translate_route plugin author is right. You
have
to switch the locale for every generated link.
But there is still another issue, how do you create your title ? It’s
from
an AR object ?
If it is the case, maybe you should reload your Active Record object
with
the current switched locale, as your current object has been loaded with
your primary locale.
2010/5/24 Lp Lp [email protected]
Hi,
The better thing is to reload your objects, you do not have the choice.
But
maybe you can just load the name of your record, and not the full object
?
After that, use fragment caching for your generated links and this will
just
be fine and performant.
2010/5/27 Lp Lp [email protected]
Guillaume Luccisano wrote:
Hi,
The solution given by the translate_route plugin author is right. You
have
to switch the locale for every generated link.
But there is still another issue, how do you create your title ? It’s
from
an AR object ?
If it is the case, maybe you should reload your Active Record object
with
the current switched locale, as your current object has been loaded with
your primary locale.
Hi and thanks for replying!
The links are generated based on the id and name fields of the loaded
active record objects.
I did a test and it seems the links do get generated corrently if I
specify the locale in the object’s to_param method.
If I reload all of the objects in each page three times (the number of
translations currently) my site gets a huge performance hit…
I was wondering if it would be possible to generate the ids (id+name
fields) for each locale in the to_param method and store them into the
active record object (as an array for example)? Then this array could be
utilized by overriding the link_to method that’s used in the fragments?