修复i18n跟element-ui内置多语言功能冲突的问题。

src/utils/i18n.js

@@ -34,12 +34,44 @@ const langResources = {
   }
 }
 
+// *********************  下述代码参考element-ui/lib/locale/format.js begin  *****************//
+
+const RE_NARGS = /(%|)\{([0-9a-zA-Z_]+)\}/g;
+function hasOwn(obj, key) {
+  return Object.prototype.hasOwnProperty.call(obj, key);
+}
+
+const elLocalFormatter = function template(string, args) {
+  return string.replace(RE_NARGS, (match, prefix, i, index) => {
+    let result;
+
+    if (string[index - 1] === '{' &&
+        string[index + match.length] === '}') {
+      return i;
+    } else {
+      result = hasOwn(args, i) ? args[i] : null;
+      if (result === null || result === undefined) {
+        return '';
+      }
+
+      return result;
+    }
+  })
+}
+
+// *********************  下述代码参考element-ui/lib/locale/format.js end  ******************//
+
 Vue.use(si18n, {
   lang: localStorage.getItem('v_form_locale') || 'zh-CN',
   messages: langResources
 })
 
-locale.i18n((key, value) => Vue.prototype.$st(key))
+locale.i18n((key, value) => {
+  let result = Vue.prototype.$st(key)
+  //console.log('test-key', key)
+  //console.log('test-result', result)
+  return elLocalFormatter(result, value)
+})
 
 export const changeLocale = function(langName) {
   Vue.prototype.$si18n.setLang(langName)

src/utils/smart-vue-i18n/index.js

@@ -27,13 +27,13 @@ const install = (Vue, options) => {
         const message = get(messages, path)
         return typeof message === 'function'
             ? message(...args)
-            : message || path
+            : (message !== null ? message : path)
     }
 
     proto.$st2 = (path, path2) => {
       let messages = _vm.messages[_vm.lang]
       const message = get(messages, path)
-      return (message !== '') ? message : get(messages, path2)
+      return (message !== null) ? message : get(messages, path2)
     }
 
     proto.$si18n.add = (messages = {}) => {

src/utils/smart-vue-i18n/utils.js

@@ -9,7 +9,7 @@ export function get(object, path) {
   let result = object
 
   keys.forEach(key => {
-      result = isDef(result[key]) ? result[key] : ''
+      result = isDef(result) && isDef(result[key]) ? result[key] : null
   })
 
   return result