Question

我正在使用Express和Mongoose在NodeJS上构建一个小型REST API，并且我遇到了一个似乎无法解决的TypeError。

Express Router和Mongoose如下：

const Router = require('express').Router;
const router = new Router();
const querystring = require('querystring')
const mongoose = require('mongoose')
const Schema = mongoose.Schema;

const iptvSchema = new Schema({
  appName: { type: String, required: true },
  userId: { type: String, required: true },
  level: { type: String, required: true },
  title: { type: String, required: true },
  message: {type: String},
  meta: {
    ip: {type: String},
    mac: {type: String},
    campus: {type: String},
    venue: {type: String},
    room: {type: String},
    serial: {type: String}
  },
  tags: {type: Array}
});

const Iptv = mongoose.model('Iptv', iptvSchema)

router.route('/add/')
  .all(function(req, res, next) {
    console.log("/add/ route")
    var query = Object.keys(querystring.parse(req.originalUrl))[1]
    console.log(query)
    var record = new Iptv(query);
    record.save(function(err) {
      console.log("save")
      if (err) {
        console.log("error")
        console.log(err)
      } else {
        console.log("record created")
      }
    })
  })


module.exports = router;

传入请求是来自客户端JQuery的GET AJAX请求。 query变量被验证为从GET请求中提取的正确JSON字符串：

{"appName":"iptv","userId":"0002026941e2","level":"info","title":"Amino Connected"}

请求错误如下：

 TypeError: Cannot use 'in' operator to search for '_id' in {"appName":"iptv","userId":"0002026941e2","level":"info","title":"Amino Connected"}
at model.Document.$__buildDoc (/Users/jeremylo/Documents/dev/log/node_modules/mongoose/lib/document.js:222:24)
at model.Document (/Users/jeremylo/Documents/dev/log/node_modules/mongoose/lib/document.js:67:20)
at model.Model (/Users/jeremylo/Documents/dev/log/node_modules/mongoose/lib/model.js:48:12)
at new model (/Users/jeremylo/Documents/dev/log/node_modules/mongoose/lib/model.js:3785:13)
at /Users/jeremylo/Documents/dev/log/model/iptv/router.js:31:18
at Layer.handle [as handle_request] (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/layer.js:95:5)
at next (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/route.js:137:13)
at Route.dispatch (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/layer.js:95:5)
at /Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/index.js:281:22
at Function.process_params (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/index.js:335:12)
at next (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/index.js:275:10)
at Function.handle (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/index.js:174:3)
at router (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/index.js:47:12)
at Layer.handle [as handle_request] (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/Users/jeremylo/Documents/dev/log/node_modules/express/lib/router/index.js:317:13)

非常感谢任何想法。

Answer 1

可能您传递的是JSON字符串而不是JSON对象，您需要在创建记录之前将其解析为JSON对象

替换

tabs

与

var record = new Iptv(query);

Answer 2

大多数浏览器都支持JSON.parse（），它在ECMA-262第5版（JavaScript所基于的规范）中定义。它的用法很简单：

var json = '{"appName":"iptv","userId":"0002026941e2","level":"info","title":"Amino Connected"}',
    obj = JSON.parse(json);

console.log(obj.appName);

NodeJS Mongoose record.save TypeError

2 个答案: