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Find inside a hash MongoDB?
To find inside a hash MongoDB, you can use dot(.) notation. Let us first create a collection with documents
> db.hashDemo.insertOne({"ClientName":"Larry","ClientAge":23,"ClientDetails":{ "isEducated": true, "ClientProject" : "University Management"}}); { "acknowledged" : true, "insertedId" : ObjectId("5ca1ef1266324ffac2a7dc5e") } > db.hashDemo.insertOne({"ClientName":"Chris","ClientAge":26,"ClientDetails":{ "isEducated":false, "ClientProject" : "Online Book Store"}}); { "acknowledged" : true, "insertedId" : ObjectId("5ca1ef7766324ffac2a7dc5f") }
Following is the query to display all documents from a collection with the help of find() method
> db.hashDemo.find().pretty();
This will produce the following output
{ "_id" : ObjectId("5ca1ef1266324ffac2a7dc5e"), "ClientName" : "Larry", "ClientAge" : 23, "ClientDetails" : { "isEducated" : true, "ClientProject" : "University Management" } } { "_id" : ObjectId("5ca1ef7766324ffac2a7dc5f"), "ClientName" : "Chris", "ClientAge" : 26, "ClientDetails" : { "isEducated" : false, "ClientProject" : "Online Book Store" } }
Following is the query to find inside a hash MongoDB
> db.hashDemo.find({"ClientDetails.isEducated" : false, "ClientDetails.ClientProject" : "Online Book Store"}).pretty();
This will produce the following output
{ "_id" : ObjectId("5ca1ef7766324ffac2a7dc5f"), "ClientName" : "Chris", "ClientAge" : 26, "ClientDetails" : { "isEducated" : false, "ClientProject" : "Online Book Store" } }
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