I am trying to run this simple embedded document using mongoose:

var mongoose = require('mongoose');
var PageSchema = new mongoose.Schema({
    url:String
});
var AlbumSchema = new mongoose.Schema({
    pages:[ PageSchema ]
});

mongoose.model('Album', AlbumSchema);
var Album = mongoose.model('Album');
var album = new Album({pages:[{url:"1"}]});
album.save(function(err, a) {
    console.log(err);
});

After I run this code the second time I get this Error:

{ 
    [MongoError: E11000 duplicate key error index: doalbums.albums.$pages.id_1  dup key: { : null }]
    name: 'MongoError',
    err: 'E11000 duplicate key error index: doalbums.albums.$pages.id_1  dup key: { : null }',
    code: 11000,
    n: 0,
    connectionId: 161,
    ok: 1 
}

What am I doing wrong?

I am trying to run this simple embedded document using mongoose:

var mongoose = require('mongoose');
var PageSchema = new mongoose.Schema({
    url:String
});
var AlbumSchema = new mongoose.Schema({
    pages:[ PageSchema ]
});

mongoose.model('Album', AlbumSchema);
var Album = mongoose.model('Album');
var album = new Album({pages:[{url:"1"}]});
album.save(function(err, a) {
    console.log(err);
});

After I run this code the second time I get this Error:

{ 
    [MongoError: E11000 duplicate key error index: doalbums.albums.$pages.id_1  dup key: { : null }]
    name: 'MongoError',
    err: 'E11000 duplicate key error index: doalbums.albums.$pages.id_1  dup key: { : null }',
    code: 11000,
    n: 0,
    connectionId: 161,
    ok: 1 
}

What am I doing wrong?

• javascript
• node.js
• mongodb
• mongoose

1 Answer 1

I am not sure what you are doing wrong here,but what is happening is: An index is created for field 'pages' so it does not allow duplicates.To check this you may give this mand in mongo shell doalbums.albums.getIndexes()(I think your DB name is doalbums and collection name is albums ) this will list all indexes in "albums". Then remove index that is not required,using db.albums.dropIndex().This will allow duplication. You can refer http://docs.mongodb/manual/administration/indexes/