How can I pass an array to the server when using $http?

Question

I have an array of ids that I want to pass to the server. The other answers I have seen online describe how to pass these ids as query parameters in the url. I prefer not to use this method because there may be lots of ids. Here is what I have tried:

AngularJS:

console.log('my ids = ' + JSON.stringify(ids)); // ["482944","335392","482593",...]

var data = $.param({
    ids: ids
});

return $http({
    url: 'controller/method',
    method: "GET",
    data: data,
    headers: {'Content-Type': 'application/x-www-form-urlencoded'}
})
.success(function (result, status, headers, config) {
    return result;
})

Node.js:

app.get('/controller/method', function(req, res) {
    console.log('my ids = ' + JSON.stringify(req.body.ids)); // undefined
    model.find({
        'id_field': { $in: req.body.ids }
    }, function(err, data){
        console.log('ids from query = ' + JSON.stringify(data)); // undefined
        return res.json(data);
    });

});

Why am I getting undefined on the server side? I suspect it's because of my use of $.params, but I'm not sure.

Dalorzo · Accepted Answer · 2014-08-31 00:10:55Z

4

In Rest GET methods uses the URL as the method to transfer information if you want to use the property data in your AJAX call to send more information you need to change the method to a POST method.

So in the server you change your declaration to:

app.post( instead of app.get(

edited Aug 31, 2014 at 0:10

answered Aug 31, 2014 at 0:01

Dalorzo

20k7 gold badges57 silver badges102 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Community · Accepted Answer · 2017-05-23 12:08:38Z

1

If you're using ExpressJS server-side, req.body only contains data parsed from the request's body.

With GET requests, data is instead sent in the query-string, since they aren't expected to have bodies.

GET /controller/method?ids[]=482944&ids[]=...

And, the query-string is parsed and assigned to req.query instead.

console.log('my ids = ' + JSON.stringify(req.query.ids));
// ["482944","335392","482593",...]

edited May 23, 2017 at 12:08

CommunityBot

11 silver badge

answered Aug 31, 2014 at 0:20

Jonathan Lonowski

124k35 gold badges203 silver badges202 bronze badges

1 Comment

Chris Paterson Over a year ago

Is there a limit on how much data I can send via this method? My concern is that it will break if I am sending a large number of ids.

Collectives™ on Stack Overflow

How can I pass an array to the server when using $http?

2 Answers 2

Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related