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Search a sub-field on MongoDB?
To search a sub-filed in MongoDB, you can use double quotes along with dot notation. Let us first create a collection with documents −
> db.searchSubFieldDemo.insertOne( ... { ... "UserDetails": ... {"UserEmailId":"John123@gmail.com","UserAge":21} ... } ... ); { "acknowledged" : true, "insertedId" : ObjectId("5cd3d909edc6604c74817ce2") } > db.searchSubFieldDemo.insertOne( { "UserDetails": {"UserEmailId":"Carol@yahoo.com","UserAge":26} } ); { "acknowledged" : true, "insertedId" : ObjectId("5cd3d9a4edc6604c74817ce3") }
Following is the query to display all documents from a collection with the help of find() method −
> db.searchSubFieldDemo.find().pretty();
This will produce the following output −
{ "_id" : ObjectId("5cd3d909edc6604c74817ce2"), "UserDetails" : { "UserEmailId" : "John123@gmail.com", "UserAge" : 21 } } { "_id" : ObjectId("5cd3d9a4edc6604c74817ce3"), "UserDetails" : { "UserEmailId" : "Carol@yahoo.com", "UserAge" : 26 } }
Following is the query to search a sub-field on MongoDB −
> db.searchSubFieldDemo.find({"UserDetails.UserEmailId":"Carol@yahoo.com"});
This will produce the following output −
{ "_id" : ObjectId("5cd3d9a4edc6604c74817ce3"), "UserDetails" : { "UserEmailId" : "Carol@yahoo.com", "UserAge" : 26 } }
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