req.body不能作为数组读取

Question

我正在使用node.js来接收一个帖子请求,请求体在打印后使用以下内容获得此内容console.log():

{ 
  'object 1': 
   { 
     deviceType: 'iPad Retina',
     guid: 'DF1121F9-FE66-4772-BE74-42936F1357FF',
     is_deleted: '0',
     last_modified: '1970-12-19T06:01:17.171',
     name: 'test1',
     projectDescription: '',
     sync_status: '1',
     userName: 'testUser' 
   },
  'object 0': 
   { 
     deviceType: 'iPad Retina',
     guid: '18460A72-2190-4375-9F4F-5324B2FCCE0F',
     is_deleted: '0',
     last_modified: '1970-12-19T06:01:17.171',
     name: 'test2',
     projectDescription: '',
     sync_status: '1',
     userName: 'testUser' 
   } 
}

我正在使用以下node.js代码获取请求:

var restify = require('restify'),
    mongoose = require('mongoose');
var connect = require('connect');
var bodyParser = require('body-parser');
/*server declaration
...
...
*/
server.use(bodyParser.json());
server.use(bodyParser.urlencoded({ extended: true }));

server.post('/project', function (req, res, next) {
       console.log(req.body);//the output is shown above
       console.log(req.body.length);// --> output is undefined

       //2
       body.req.forEach(function (item) {//got an exception 
       console.log(item);
   });
});

具有forEach函数的代码的第二部分给出了这个异常" [TypeError: Object #<Object> has no method 'forEach']"

你知道我错过了什么吗？

Answer 1

req.body不是数组,而是具有两个属性的对象.从您提供的console.log输出中可以看出这一点.因此,它没有length财产也没有forEach方法.

如果它是一个数组,它看起来像这样:

[ 
   { 
     deviceType: 'iPad Retina',
     guid: 'DF1121F9-FE66-4772-BE74-42936F1357FF',
     is_deleted: '0',
     last_modified: '1970-12-19T06:01:17.171',
     name: 'test1',
     projectDescription: '',
     sync_status: '1',
     userName: 'testUser' 
   },
   { 
     deviceType: 'iPad Retina',
     guid: '18460A72-2190-4375-9F4F-5324B2FCCE0F',
     is_deleted: '0',
     last_modified: '1970-12-19T06:01:17.171',
     name: 'test2',
     projectDescription: '',
     sync_status: '1',
     userName: 'testUser' 
   } 
]

要迭代您拥有的对象的键,您可以使用该构造

for(var key in req.body) {
  if(req.body.hasOwnProperty(key)){
    //do something with e.g. req.body[key]
  }
}

Answer 2

forEach 仅为数组定义.

你需要使用for...in循环代替:

for (var key in req.body) {
  if (req.body.hasOwnProperty(key)) {
    item = req.body[key];
    console.log(item);
  }
}