grails g:select i18n

问题

I just read a lot and googled but I'm frustrated right now.

I have a Country domain model

class Country{
   String countryCode //maybe EN, DE, CH...
}

Now I want a translation inside the . I read in the documentation (and with google) that it is possible with the "id" to select it from the translation message property files. Something like:

country.code.1=America
country.code.2=England
country.code.3=Germany

But this is not what I want. I want to have something like:

country.code.US=America
country.code.EN=England
country.code.DE=Germany

So, I found a possible solution from stackoverflow: translate a HTML select element in Grails that would mean for me I have to put it like this:

<g:select name="country"
          from="${allCountries}"
          value="${country}"
          optionKey="id"
          optionValue="${ {countryCode->g.message(code:'country.code.'+countryCode)}  }"/>

But my result is inside the dropdown: "country.code.grails.Country : 1" (and so on for each country)

If I change the last line of the gsp-g:select implementation to:

[...]optionValue="${ {countryCode->g.message(code:'country.code.US')}

as you see hardcoded! And THIS works :-D

Hope you got me and can help me, thank you very much!

回答1:

There are 3 possibilities:

1. Instead of sending the id to the controller, use the contryCode instead of id:

   <g:select name="contryByCountryCode" 
       from="${countryCodes}" 
       valueMessagePrefix="com.yourcompany"/>
   

   Will produce:

   <select name="contryByCountryCode" id="contryByCountryCode" >
       <option value="US">United States<option>
       ...
   </select>
   

   If you have proper messages configured. In the backend you need to do something like:

   def country = Country.findByCountryCode(params.contryByCountryCode)
   

2. Do it manually:

   <select name="contryByCountryCode" id="contryByCountryCode" >
       <g:each in="${countryCodes}" var="country">
       <option value="${country.id}">
           ${message(code:"prefix" + country.countryCode)}
       <option>
       </g:each>
   </select>
   

3. Patch g:select to work in case optionValue and messagePrefix is defined ;-)

来源：https://stackoverflow.com/questions/8280715/grails-gselect-i18n