播放更改语言动态

Question

Fairly new to Play trying to change the language dynamically.

route

GET     /language/:lang             controllers.Index.setLanguage(lang: String)

Tried so far (but none of them work)

Lang.apply(language);
Lang.change(language);    // <-- doesn't even compile
Lang.apply(language);
ctx().changeLang(language);

view

@import play.i18n.Messages
...
@Messages.get("message")
@messages.at("message")
...

Both not working..

application.config

messages

Method with some logging

public Result setLanguage(String language) {
  Http.Context context = Http.Context.current();
  String langFromHttpContext = context.lang().language();
  String langFromCtx = ctx().lang().language();
  String playLangCookieVal = request().cookies().get("PLAY_LANG").value();
  boolean changed = ctx().changeLang(language);

  Logger.info("Request param: " + language);
  Logger.info("Http context language: " + langFromHttpContext);
  Logger.info("ctx language: " + langFromHttpContext);
  Logger.info("PLAY_LANG cookie value: " + langFromCtx);
  Logger.info("Changed: " + changed);
  return ok(index.render("Index"));
}

Result

application - Request param: en
application - Http context language: nl
application - ctx language: nl
application - PLAY_LANG cookie value: nl
application - Changed: false

Answer 1

尝试这个：

ctx().changeLang(language);

Answer 2

You need to delete the application.langs="nl" from the configuration. It's deprecated and replaced by the play.i18n.langs .

You must leave only play.i18n.langs=["en","nl"]

You code does not work because Play reads the application.langs="nl" and ignore play.i18n.langs=["en","nl"] (because langs already read from the application.langs ), so it suggest your application use only "nl" language and, of course could not set it to "en", so ctx().changeLang(language) method return false