Select document by _id accessing database from MongoDB MLAB in Node.js

Question

I am trying to access the document from MongoDB which was hosted on MLab but getting following error while access document with _id. Following is code for your reference

var express = require('express');
var router = express.Router();
var mongojs = require('mongojs');
var db = mongojs('mongodb://<<UserName>>:<<Password>>@aadds157248.mlab.com:57248/<<DatabaseName>>',['temp1']);
router.get('/todo/:id',function(req,res,next){
var ObjectID = mongojs.ObjectID;
var o_id = new ObjectID (req.params.id);
db.temp1.findOne({
   '_id': o_id
},
function(err,temp1){
    if (err){
        res.send(err);
    }
    else {
        res.json(temp1);
    }
})
});

But getting below error when try to access the URL : http://localhost:3000/api/v1/todo/5870f7f1f36d2872530d26f1

TypeError: hex is not a function at Function.from (native) at Function.from (native) at new ObjectID (C:\Kamlesh\Angular2\meantodos\node_modules\bson\lib\bson\objectid.js:52:32) at C:\Kamlesh\Angular2\meantodos\routes\todos.js:23:14 at Layer.handle [as handle_request] (C:\Kamlesh\Angular2\meantodos\node_modules\express\lib\router\layer.js:95:5) at next (C:\Kamlesh\Angular2\meantodos\node_modules\express\lib\router\route.js:131:13) at Route.dispatch (C:\Kamlesh\Angular2\meantodos\node_modules\express\lib\router\route.js:112:3) at Layer.handle [as handle_request] (C:\Kamlesh\Angular2\meantodos\node_modules\express\lib\router\layer.js:95:5) at C:\Kamlesh\Angular2\meantodos\node_modules\express\lib\router\index.js:277:22 at param (C:\Kamlesh\Angular2\meantodos\node_modules\express\lib\router\index.js:349:14)

Can you print req.params.id and see what value you are getting on server side ? do console.log(req.params.id); — Sumeet Kumar Yadav
– Sumeet Kumar Yadav, Commented Jan 8, 2017 at 6:15
@Sumeet Yes, I tried get the value which I am sending from URL as mentioned in question. — Kamlesh
– Kamlesh, Commented Jan 8, 2017 at 6:18

ecunado · Accepted Answer · 2017-01-09 17:08:42Z

1

I'm getting today a similar error related with some mongodb-core update.

I fixed it by forcing mongodb-core to the previous version i had:

npm install --save [email protected]

Anyway, the first thing you have to check is that req.params.id has a valid hexadecimal 25 char string.

edited Jan 9, 2017 at 17:08

answered Jan 9, 2017 at 17:03

ecunado

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