我试图瞄准,以便我可以在所调用的函数中使用i18n。
我有错误:
(node:15696) UnhandledPromiseRejectionWarning: TypeError: i18n.__ is not a function
我怎样才能使i18n可以在函数内部工作并且不必在要求之内?
Server.js:
var i18n = require('i18n-2');
global.i18n = i18n;
i18n.expressBind(app, {
// setup some locales - other locales default to en silently
locales: ['en', 'no'],
// change the cookie name from 'lang' to 'locale'
cookieName: 'locale'
});
app.use(function(req, res, next) {
req.i18n.setLocaleFromCookie();
next();
});
//CALL another file with some something here.
otherfile.js:
somefunction() {
message = i18n.__("no_user_to_select") + "???";
}
我该如何解决?
答案 0 :(得分:4)
如果您仔细阅读Using with Express.js下的文档,则清楚地记录了它的用法。通过i18n
绑定i18n.expressBind
到Express应用后,i18n
通过req
对象可用,该对象可用于所有快递中间件,例如:
req.i18n.__("My Site Title")
因此somefunction
应该是像这样的中间件:
function somefunction(req, res, next) {
// notice how its invoked through the req object
const message = req.i18n.__("no_user_to_select") + "???";
// outputs -> no_user_to_select???
}
或者您需要通过类似以下的中间件显式传递req
对象:
function somefunction(req) {
const message = req.i18n.__("no_user_to_select") + "???";
// outputs -> no_user_to_select???
}
app.use((req, res, next) => {
somefunction(req);
});
如果您想直接使用i18n
,则需要instantiate
,如文档所述
const I18n = require('i18n-2');
// make an instance with options
var i18n = new I18n({
// setup some locales - other locales default to the first locale
locales: ['en', 'de']
});
// set it to global as in your question
// but many advise not to use global
global.i18n = i18n;
// use anywhere
somefunction() {
const message = i18n.__("no_user_to_select") + "???";
// outputs -> no_user_to_select???
}
许多建议不要使用global。
// international.js
// you can also export and import
const I18n = require('i18n-2');
// make an instance with options
var i18n = new I18n({
// setup some locales - other locales default to the first locale
locales: ['en', 'de']
});
module.exports = i18n;
// import wherever necessary
const { i18n } = require('./international');