Mongoose: CastError: Cast to ObjectId failed for value “[object Object]” at path “_id”

Question

I am new to node.js, so I have a feeling that this will be something silly that I have overlooked, but I haven\'t been able to find an answer that fixes my problem. What I\'

Answer 1

I've faced this error, That was because the value you want to filter in the _id field is not in an ID format, one "if" should solve your error.

const mongoose = require('mongoose');

console.log(mongoose.Types.ObjectId.isValid('53cb6b9b4f4ddef1ad47f943'));
// true
console.log(mongoose.Types.ObjectId.isValid('whatever'));
// false

To solve it, always validate if the criteria value for search is a valid ObjectId

const criteria = {};
criteria.$or = [];

if(params.q) {
  if(mongoose.Types.ObjectId.isValid(params.id)) {
    criteria.$or.push({ _id: params.q })
  }
  criteria.$or.push({ name: { $regex: params.q, $options: 'i' }})
  criteria.$or.push({ email: { $regex: params.q, $options: 'i' }})
  criteria.$or.push({ password: { $regex: params.q, $options: 'i' }})
}

return UserModule.find(criteria).exec(() => {
  // do stuff
})

Answer 2

For the record: I had this error trying to fill a subdocument in a wrong way:

{
[CastError: Cast to ObjectId failed for value "[object Object]" at path "_id"]
message: 'Cast to ObjectId failed for value "[object Object]" at path "_id"',
name: 'CastError',
type: 'ObjectId',
path: '_id'
value:
  [ { timestamp: '2014-07-03T00:23:45-04:00',
  date_start: '2014-07-03T00:23:45-04:00',
  date_end: '2014-07-03T00:23:45-04:00',
  operation: 'Deactivation' } ],
}

look ^ value is an array containing an object: wrong!

Explanation: I was sending data from php to a node.js API in this way:

$history = json_encode(
array(
  array(
  'timestamp'  => date('c', time()),
  'date_start' => date('c', time()),
  'date_end'   => date('c', time()),
  'operation'  => 'Deactivation'
)));

As you can see $history is an array containing an array. That's why mongoose try to fill _id (or any other field) with an array instead than a Scheme.ObjectId (or any other data type). The following works:

$history = json_encode(
array(
  'timestamp'  => date('c', time()),
  'date_start' => date('c', time()),
  'date_end'   => date('c', time()),
  'operation'  => 'Deactivation'
));

Answer 3

Had the same problem, I just coerced the id into a string.

My schema:

const product = new mongooseClient.Schema({
    retailerID: { type: mongoose.SchemaTypes.ObjectId, required: true, index: true }
});

And then, when inserting:

retailerID: `${retailer._id}`

Answer 4

My solution is that i want data from all docs and i dont want _id, so

User.find({}, {_id:0, keyToShow:1, keyToNotShow:0})

Answer 5

I was receiving this error CastError: Cast to ObjectId failed for value “[object Object]” at path “_id” after creating a schema, then modifying it and couldn't track it down. I deleted all the documents in the collection and I could add 1 object but not a second. I ended up deleting the collection in Mongo and that worked as Mongoose recreated the collection.

Answer 6

I also encountered this mongoose error CastError: Cast to ObjectId failed for value \"583fe2c488cf652d4c6b45d1\" at path \"_id\" for model User

So I run npm list command to verify the mongodb and mongoose version in my local. Heres the report: ......
......
├── mongodb@2.2.19
├── mongoose@4.7.2
.....

It seems there's an issue on this mongodb version so what I did is I uninstall and try to use different version such as 2.2.16

$ npm uninstall mongodb, it will delete the mongodb from your node_modules directory. After that install the lower version of mongodb.
$ npm install mongodb@2.2.16
Finally, I restart the app and the CastError is gone!!