How do I specify MongoDB key/value parameters in an $http.get with an AngularJS controller?

Question

I'm using the MEAN stack for a web app. In my controller.js, I have the following:

var refresh3 = function() {
    $http.get('/users').success(function(response) {
        console.log("I got the data I requested");
        $scope.users = response;
        $scope.contact3 = "";
    });
};

refresh3();

This pulls back every object in the "users" collection from my MongoDB. How could I add parameters to this to bring back, for example, only objects where "name" : "Bob" ? I have tried adding parameters in the '/users' parentheses using:

$http.get('/users', {params:{"name":"Bob"}})

I've also tried variants of that, but no luck. Any help would be appreciated!

$http.get('/users', {params:{"name":"Bob"}}) seems correct; please define "no luck" — Manube
– Manube, Commented May 15, 2015 at 13:11
by default its goes to server as query string unless you specify in $resource, to make actual like /users/bob. in both cases, you still have req.query or req.params accessible in server side code. — YOU
– YOU, Commented May 15, 2015 at 13:14
"no luck" meaning either the controller breaks and I don't get any data back, or I get the same data I would have expected without any parameters. — mjoyce91
– mjoyce91, Commented May 15, 2015 at 13:21
please check whether the data is passed alongside your query (as a query string: you can use developer tools in your browser) and whether it is received by your server; does your mean stack use Mongoose? — Manube
– Manube, Commented May 15, 2015 at 13:24
Other parts of the site use mongoose, but this part specifically is using MongoJS. — mjoyce91
– mjoyce91, Commented May 15, 2015 at 13:30

Manube · Accepted Answer · 2015-05-15 19:50:54Z

2

If your server is receiving the data

(and it should, as $http.get('/users', {params:{"name":"Bob"}}) is correct)

On server side, make use of the query string:

req.query

like so:

app.get('/users', function(req,res){
  if(req.query.name){
    db.users.find({"name":req.query.name},function (err, docs) { console.log(docs); res.json(docs); }); 
  }
  else{
    db.users.find(function (err, docs) { console.log(docs); res.json(docs); });
  }
});

WHAT WAS THE ISSUE?

You hinted in your comments that your server was set to respond to the app.get('/users') GET request like so:

db.users.find(function (err, docs) {
 // docs is an array of all the documents in users collection
 console.log(docs); res.json(docs); }); });

So I believe that your angularjs $http get is correct, and your server is receiving the parameters {"name":"Bob"} as it should; it just doesn't know what to do with them: all it is set to do is to return the whole collection in the particular case of a app.get('/users') GET request.

HOW TO CONFIGURE YOUR SERVER FOR REST

You do not have to re-invent the wheel on the server.

Rather, you could consider using a middleware to automate the task (in the present case, the task is to issue a proper MongoDb request when you receive a get query with parameters from the client)

e.g. express-restify-mongoose middleware

edited May 15, 2015 at 19:50

answered May 15, 2015 at 14:57

Manube

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6 Comments

mjoyce91 Over a year ago

Thanks for your response. Would you be able to clarify where the "if" statement goes in relation to the original app.get?

Manube Over a year ago

Excellent remark: got the statement mangled; will rewrite when access to proper computer in 5 min

Manube Over a year ago

ok, I rewrote the "if" statement the way I had originally planned to; but the point is that manually taking care of all possible queries is painful and error prone; it is way easier to rely on a tool especially designed for rest queries, like the one I provided a link to

Manube Over a year ago

by the way, I assumed your server was getting the data (ie the request with the {"name":"Bob"} in the query string). Is it the case?

mjoyce91 Over a year ago

Hey the new code worked man, I really appreciate it. I will definitely look into the tool you linked to. Really appreciate the help.

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How do I specify MongoDB key/value parameters in an $http.get with an AngularJS controller?

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If your server is receiving the data

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