typescript 同一文件夹下的文件可以使用另外一个文件的变量？

Question

文件1：

// user数据库Model
const mongoose = require('../../db');
const Schema = mongoose.Schema;

mongoose.Promise = global.Promise;

const messageSchema = new Schema({
    avatar: String,
    content: String,
    sender: String,
    time: String,
    room: String
});
// messageSchema.methods.findByUsername = function(username, cb){
//     return this.model('User').find({username: username}, cb)
// };
module.exports = mongoose.model('Message', messageSchema);

文件2：

/**
 * Created by Jack on 2017/4/20.
 */
const mongoose = require('../../db');
const Schema = mongoose.Schema;

mongoose.Promise = global.Promise;

const roomidSchema = new Schema({
    room: String
});

module.exports = mongoose.model('Roomid', roomidSchema);

结果报错如下：

说我重复声明了，这是怎么回事？

Answer 1

TypeScript 请使用 import 语法导入模块

If you don't have a root level import or export in your file then it is considered a global module.

参见：https://basarat.gitbooks.io/t...

Answer 2

是全局中已经有Schema变量了吧