insert documents in MongoDB multiple nested elements - mongodb

Question

I am looking to insert another document in a multiple nested document. Do you have any other ideas of how to solve it? Thanks
{
"_id" : ObjectId("576bddaa08b8f7dc20000033"),
"Name" : "Business",
"Image" : "fa fa-dollar",
"Description" : "Money, Capitalism, Business",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "https://www.rocklandtrust.com/assets/content/txh9vvwg/2014/08/06/business%20savings.jpg",
"Children" : [
{
"_id" : ObjectId("57715e0608b8f7441b00002d"),
"Name" : "Business School",
"URLName" : "Business-School",
"Image" : "http://www.small-business-website.net/wp-content/uploads/2016/04/How-to-achieve-a-successful-business-sale-128x128.jpg",
"Description" : "Everything about Business Schools",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "http://www.incae.edu/sites/default/files/styles/slideshow-un-medio/public/primerdiamba2010_018.jpg?itok=LfZmxw14",
"Children" : []
},
{
"_id" : ObjectId("57715f0d08b8f7942c00002b"),
"Name" : "Journals",
"URLName" : "Journals",
"Image" : "http://www.alliedacademies.org/images/accounting.png",
"Description" : "Journals and Diaries about Businesses",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "http://www.advantagebusinessvaluations.com/wp-content/uploads/2015/08/slide3.jpg",
"Children" : []
},
{
"_id" : ObjectId("57740ae208b8f7f41a000039"),
"Name" : "Stock Exchange",
"URLName" : "Stock-Exchange",
"Image" : "https://38.media.tumblr.com/avatar_bd29383b5657_128.png",
"Description" : "Stock Exchange, US Stock",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "http://c.fastcompany.net/multisite_files/coexist/imagecache/1280/poster/2013/04/1681873-poster-1280-stock-chart.jpg",
"Children" : [
{
"_id" : ObjectId("5774464608b8f7f41a00004a"),
"Name" : "Stock Software",
"URLName" : "Stock-Software",
"Image" : "http://s1.evcdn.com/images/block/I0-001/026/278/060-2.jpeg_/1-day-introduction-forex-stock-market-trading-60.jpeg",
"Description" : "Stock Excba ge Software",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "http://media.therakyatpost.com/wp-content/uploads/2015/04/stock-exchange-record-bigstock-900x470.jpg",
"Children" : []
},
{
"_id" : ObjectId("5774e2cb08b8f76c1a00002e"),
"Name" : "Meta Trader",
"URLName" : "Meta-Trader",
"Image" : "http://www.file-extensions.org/imgs/app-icon/128/6904/metatrader-icon.png",
"Description" : "MetaTrader",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "http://www.roboforex.com/files/filemanager/image/site/metatrader.png",
"Children" : []
},
{
"_id" : ObjectId("5774eb2708b8f76c1a000043"),
"Name" : "Meta Trader",
"URLName" : "Meta-Trader",
"Image" : "http://www.file-extensions.org/imgs/app-icon/128/6904/metatrader-icon.png",
"Description" : "MetaTrader",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "http://www.roboforex.com/files/filemanager/image/site/metatrader.png",
"Children" : []
},
{
"_id" : ObjectId("5774eb8208b8f76c1a000044"),
"Name" : "Meta Trader",
"URLName" : "Meta-Trader",
"Image" : "http://www.file-extensions.org/imgs/app-icon/128/6904/metatrader-icon.png",
"Description" : "MetaTrader",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "http://www.roboforex.com/files/filemanager/image/site/metatrader.png",
"Children" : []
},
{
"_id" : ObjectId("5774eb8f08b8f76c1a000045"),
"Name" : "Meta Trader",
"URLName" : "Meta-Trader",
"Image" : "http://www.file-extensions.org/imgs/app-icon/128/6904/metatrader-icon.png",
"Description" : "MetaTrader",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0,
"CoverImage" : "http://www.roboforex.com/files/filemanager/image/site/metatrader.png",
"Children" : []
}
]
}
],
"URLName" : "Business"
}
How can I insert another document in Business.Children.Children.(Stock Software).Children

Answer 1

Use the positional operator to push values.
https://docs.mongodb.com/manual/reference/operator/update/positional/
db.collectioname.update(
{
"_id" : ObjectId("576bddaa08b8f7dc20000033"),
"Children._id" : ObjectId("57715e0608b8f7441b00002d")
},
{
$push: {
"Children.$.Children": {
"Name" : "Business School",
"URLName" : "Business-School",
"Image" : "http://www.small-business-website.net/wp-content/uploads/2016/04/How-to-achieve-a-successful-business-sale-128x128.jpg",
"Description" : "Everything about Business Schools",
"NoForums" : 0,
"NoTopics" : 0,
"NoComments" : 0,
"NoUsers" : 0
}
}
}
)
Note : Beware Mongo does not not allow nested documents to update.It is a known issue. It allows only to a single level.
https://jira.mongodb.org/browse/SERVER-831