如何在对象数组中打印项目

I am returning an object from a site which apart from other parameters also contains an array of objects.

我从一个站点返回一个对象,除了其他参数之外还包含一个对象数组。

If I do console.log(req.body.cart) I print this [ { title: 'iphone 6', cost: '650' } ]

如果我做console.log(req.body.cart)我打印[{title:'iphone 6',费用:'650'}]

which I need only the title. I tried stringify, which is not what I want and parse which returned an 500 error.

我只需要标题。我尝试了stringify,这不是我想要的,并解析返回500错误。

router.post('/itemstobuy', function(req, res, next){
  if(!req.body.name || !req.body.lastname || !req.body.address
      || !req.body.email || !req.body.cart){
    return res.status(400).json({message: 'Please fill out all fields'});
  }

   var mailOptions={
    from: 'anEmail@gmail.com',
    to: 'anotherEmail@gmail.com',
    subject: 'Subject',
    html: '<p>Name: ' + req.body.name + '</p>' +
    '<p>LastName: ' + req.body.lastname + '</p>' +
    '<p>Address: ' + req.body.address + '</p>' +
    '<p>Email: ' + req.body.email + '</p>' +
    '<p>Cart: ' + JSON.stringify(req.body.cart) + '</p>'
  }

  transporter.sendMail(mailOptions, function(error, info){
    if(error){
      return console.log(error);
    }
    console.log('Message sent: ' + info.response);
  });

  return res.status(200);
});

I need to show the items by their title at

我需要按照标题显示项目

'<p>Cart: ' + JSON.stringify(req.body.cart) + '</p>'

The above works but there are lots of ugly data and need just the titles of the items.

上面的工作,但有很多丑陋的数据,只需要项目的标题。

3 个解决方案

#1

As suggested in the comments:

正如评论中所建议的那样:

'<p>Cart: ' + 
 (req.body.cart || []) //Just to make things not crash and burn if we have no cart
     //Take the title from each of the items
     .map(function(item){ return item.title; })
     //Create a comma-separated string from the titles
     .join(', ') + 
'</p>'

#2

Try this. '<p>Cart: ' + JSON.parse(req.body.cart).title + '</p>'

试试这个。 '

购物车:'+ JSON.parse(req.body.cart).title +' '

#3

In case you have multiple items in the cart you can iterate through these otherwise you can access it directly req.body.cart[0].title

如果你在购物车中有多个项目,你可以迭代这些项目,否则你可以直接访问它req.body.cart [0] .title

var cart = req.body.cart;

var html: '<p>Name: ' + req.body.name + '</p>' +
'<p>LastName: ' + req.body.lastname + '</p>' +
'<p>Address: ' + req.body.address + '</p>' +
'<p>Email: ' + req.body.email + '</p>';

 html +=  '<p>Cart:<ul> '+

for(var i=0;i<cart.length;i++) html +='<li> ' + cart[i].title + '</li>';

html +='</ul></p>';

 var cart = [ { title: 'iphone 6', cost: '650' }, { title: 'iphone 5', cost: '550' } ];

  document.write( '<p>Cart:<ul> ');

for(var i=0;i<cart.length;i++) document.write('<li> ' + cart[i].title + '</li>');

document.write('</ul></p>');

#1