CODEWITHSUNDEEP
node.jsmongodbmongoose
Rishav Pandey
Rishav Pandey

Reputation: 33

document must have an _id before saving mongoose error

I am trying to create a schema.

I keep getting the document does not have an _id error, besides the code below I did try to initialize it explicitly, but nothing works.

var UserSchema = new mongoose.Schema({
     _id: mongoose.Schema.ObjectId,
     username: String,
     password: String
 });

var User = mongoose.model('user', UserSchema);

Upvotes: 3

Views: 11064

Answers (5)

MD SHAYON
MD SHAYON

Reputation: 8055

simple remove the line from your code

_id: mongoose.Schema.ObjectId

Upvotes: 0

shahryarab
shahryarab

Reputation: 109

if you want to define _id in your schema explicity you should assign a value to "_id" for each insertation. you have two way to solve this problem : 1. remove "_id" from your schema and mongoose generate id automatically. 2. assign a value to _id :

var ObjectId = require('mongodb').ObjectID; // or  var ObjectId = require('mongoose').Types.ObjectId; "but the first worked for me"
User._id = objectId('1111111111111111111');

Upvotes: 0

Alqama Bin Sadiq
Alqama Bin Sadiq

Reputation: 358

_id is the primary key for document in a mongoDB. You don't have to specify the _id in your Schema. It will be added automatically once the document is created.

Here is the sample code:

var mongoose = require('mongoose');

var Schema = mongoose.Schema;

var User = new Schema({
  username: {
    type: String
  },
  password: {
    type: String
  }
});


module.exports = mongoose.model('User', User);

Upvotes: 1

Alex Blex
Alex Blex

Reputation: 37048

http://mongoosejs.com/docs/guide.html#_id reads:

Mongoose assigns each of your schemas an _id field by default if one is not passed into the Schema constructor.

If you explicitly define _id type in the schema, it's your responsibility to set it:

User._id = mongoose.Types.ObjectId('000000000000000000000001');

Upvotes: 5

Anto S
Anto S

Reputation: 46

I think you dont need to define the _id. Try without and see if it works.

Also if that is not the problem try this:

_id: { type: Mongoose.Schema.Types.ObjectId }

Upvotes: 0

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