TypeError:无法使用"in"运算符在[{}]中搜索"_id" [英] TypeError: Cannot use 'in' operator to search for '_id' in [{}]

问题描述

我有一个如下创建的模型

I have a model created as follows

var AddressSchema = new Schema({
  category: {type: String,  default: 'home'},
  lines: {type: String },
  city: {type: String}  
});


/**
 * Employee Schema
 */
var EmployeeSchema = new Schema({
  created: {
    type: Date,

    default: Date.now
  },
  name: {
    type: String,
    required: true,
    trim: true
  },
  address: [AddressSchema],
  user: {
    type: Schema.ObjectId,
    ref: 'User'
  }
});

以下是controller.js中的代码

Following is the code in controller.js

exports.create = function(req, res) {
  console.log('in create');
  var employee = new Employee(req.body);
  employee.user = req.user;
  var address = new Address(req.body.address);
  employee.address = [address];
  console.log(employee);
  console.log(req.body);

  employee.save(function(err) {
    if (err) {
        console.log(err);

      return res.status(500).json({
        error: 'Cannot save the employee'
      });
    }
    res.json(employee);

  });
};

在我的控制台中写的日志是

Log written in my console is

{ user: 5493dabf682b42be6af784b1,
  name: 'santhu',
  _id: 5495010203fa1e000068808b,
  address: [ { _id: 5495010203fa1e000068808c, category: 'home' } ],
  created: Sat Dec 20 2014 10:24:26 GMT+0530 (IST) }
{ name: 'santhu', address: '{}' }
[TypeError: Cannot use 'in' operator to search for '_id' in {}]

为什么会出现此错误?我搜索了此错误，当我尝试保存期望对象的字符串时发生了此错误.我正在保存适当的对象，正如您在日志中看到的那样.为什么我仍然面临这个问题?

Why am I getting this error? I searched for this error and it happens when I try to save string when it expects object. I am saving proper object as you can see in logs. Why am I still facing this problem?

推荐答案

这是因为您的请求正文包含地址:"{}"，该地址不是字符串，也不是对象，如果您编写

it is because your req.body contains address: '{}' which is string not array and not object if you write

 var body={ name: 'santhu', address: []}; //and not { name: 'santhu', address: '{}'}
 var employee = new Employee(body);

它将正常工作

这篇关于TypeError:无法使用"in"运算符在[{}]中搜索"_id"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！