POST请求未发送任何请求正文

阅读了许多类似的主题后，我看不到问题的原因...

我正在尝试学习如何使用节点创建RESTful API并表达4，非常基本和简单，但是当我尝试使用POST请求保存我的文档时，没有req.body在请求上发送并且我遇到了一些问题。

让我们看一小段代码：

module.exports = (router, Bear) ->
  router.route '/bears'
    .get (req, res) ->
      Bear.find (err, bears) -> if err then err else res.json bears

    .post (req, res) -> 
      newBear =
        _id: req.body.bearId
        nombre: req.body.nombre
      bear = new Bear(newBear)
      bear.save (err) ->
        if err then res.send err 
        # res.json msg: "#{bear.nombre}, creado"
        res.json msg: "created"

到目前为止，这是我的基本路由配置（目前）。服务器是：

express = require 'express'
app = express()
morgan = require 'morgan'
bodyParser = require 'body-parser'
mongoose = require 'mongoose'

app.use bodyParser.urlencoded extended: true
app.use bodyParser.json()
app.use morgan 'dev'

require('./app/config/js/database')(mongoose)

router = express.Router()
Bear = require './app/models/js/bear'

router.get '/', (req, res) -> res.json msg: 'It works'

require('./app/routes/js/bears')(router, Bear)

app.use '/api', router

port = 8080

app.listen(port)
console.log("Corriendo en #{port}")

而且其他代码段在这里不相关（我认为），因此，当我使用邮递员或CURL发送请求时，我总是{}在服务器上收到响应和崩溃消息：

home/nano/Dev/bears/node_modules/mongoose/lib/utils.js:413
        throw err;
              ^
Error: Can't set headers after they are sent.
    at ServerResponse.OutgoingMessage.setHeader (http.js:689:11)
    at ServerResponse.header (/home/nano/Dev/bears/node_modules/express/lib/response.js:662:10)
    at ServerResponse.send (/home/nano/Dev/bears/node_modules/express/lib/response.js:146:12)
    at ServerResponse.json (/home/nano/Dev/bears/node_modules/express/lib/response.js:235:15)
    at Promise.<anonymous> (/home/nano/Dev/bears/app/routes/js/bears.js:22:20)
    at Promise.<anonymous> (/home/nano/Dev/bears/node_modules/mongoose/node_modules/mpromise/lib/promise.js:172:8)
    at Promise.emit (events.js:95:17)
    at Promise.emit (/home/nano/Dev/bears/node_modules/mongoose/node_modules/mpromise/lib/promise.js:84:38)
    at Promise.reject (/home/nano/Dev/bears/node_modules/mongoose/node_modules/mpromise/lib/promise.js:111:15)
    at Promise.error (/home/nano/Dev/bears/node_modules/mongoose/lib/promise.js:95:15)

真的我不知道我真的不知道该怎么办，我整个下午到深夜都在做这个。

好吧，我在代码中进行了更改，现在回溯消失了，但请求仍然为空。

module.exports = (router, Bear) ->
  router.route '/bears'
    .get (req, res) ->
      Bear.find (err, bears) -> 
        if err then return res.send err 
        res.json bears

    .post (req, res) -> 
      newBear =
        _id: req.body.bearId
        nombre: req.body.nombre
      bear = new Bear(newBear)
      bear.save (err) ->
        if err then return res.send err
        res.json msg: "created"

JS代码：

(function() {
  module.exports = function(router, Bear) {
    return router.route('/bears').get(function(req, res) {
      return Bear.find(function(err, bears) {
        if (err) {
          return res.send(err);
        }
        return res.json(bears);
      });
    }).post(function(req, res) {
      var bear, newBear;
      newBear = {
        _id: req.body.bearId,
        nombre: req.body.nombre
      };
      bear = new Bear(newBear);
      return bear.save(function(err) {
        if (err) {
          return res.send(err);
        }
        return res.json({
          msg: "created"
        });
      });
    });
  };

}).call(this);

我正在通过RESTClient发送用于Firefox，Curl，Postman的请求...内容类型标头是 Content-Type: application/json; charset=utf-8