What's wrong with "$in" in mongoose

Question

Good day for everyone. I have a strange error working with mongoose

module.js:437
  var compiledWrapper = runInThisContext(wrapper, filename, tru
                        ^
SyntaxError: Unexpected token .
    at Module._compile (module.js:437:25)
    at Object.Module._extensions..js (module.js:467:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:362:17)
    at require (module.js:378:17)
    at Object.<anonymous> (E:\Dropbox\Dropbox\FCP\server.js
    at Module._compile (module.js:449:26)
    at Object.Module._extensions..js (module.js:467:10)
    at Module.load (module.js:356:32)

I gues it's goes from

dbQueries.remove({_id: {$in: {req.body.data}}, authorId: req.user._id}, function onRemoveSomething(err){
            if(err) {
                res.json({epicFail: 'ERR_RestrictedAccess'});
                return; 
            }
        });

So, I have no idea what is wrong.

score 37 · Accepted Answer · edited Sep 20 '16 at 14:27

37

$in takes an array, not an invalidly formatted javascript object

{_id: {$in: [req.body.data]}

or if req.body.data is already an array, omit the wrapping [ ]

edited Sep 20 '16 at 14:27

malix

3,566
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answered Aug 07 '12 at 05:33

Andy Ray

30,372
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Holly syncasis... Thanks a lot – Roman Aug 07 '12 at 08:00
1

After a few restarts of node it works fine with {_id: {$in: req.body.data} – Roman Aug 07 '12 at 18:40
@andy-ray How to do this when req.body.data has one element? Basically the contents of req.body.data can be a single element or an array is the requirement and I am using the in operator. How should I handle this situation? – godimedia Mar 23 '15 at 16:36
1

Why is this answer being upvoted so much? Is there some tutorial which has the broken syntax listed in the original question? – Andy Ray Jan 28 '16 at 23:54
stop upvoting this answer – Andy Ray Nov 26 '18 at 05:08

score 0 · Answer 2 · answered Nov 05 '15 at 06:37

0

you have to check req.body.data is an array or not, see the code below {_id: {$in: _.isArray(req.body.data) ? req.body.data : [req.body.data] } //const _ = require('lodash');

answered Nov 05 '15 at 06:37

Haneef Abdulla

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1
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score 0 · Answer 3 · answered Aug 24 '16 at 15:52

0

Build your query based on the data

var match = {
    authorId: req.user._id
};

if(Array.isArray(data)) {
    match._id = {$in: data};
} else {
   match._id = data;
}

dbQueries.remove(match, function findMyDocs(err, foundDocs) {

});

answered Aug 24 '16 at 15:52

Lucky Soni

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What's wrong with "$in" in mongoose

3 Answers3

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