How to check if field exists for a specified id in MongoDb

Asked Dec 20 '18 at 10:42

Active Dec 20 '18 at 10:42

Viewed 290 times

I m using NodeJs and MongoDB as a backend service for my app.I want to check if field exist in database for a specified id.I have database structure like below:

{
   {
      _id:"1"
       Name:"Digi"
   }, 
   {
      _id:"2"
       Name:"Digi"
       Place:"London"
   } 
 }

I am using MongoDB driver for NodeJS.

Someone please let me know how to achieve this.

THANKS

asked Dec 20 '18 at 10:42

Digvijay

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1

`db.collection.find({ "Place": { "$exists": true } })` – Ashh Dec 20 '18 at 10:44
1

Possible duplicate of [Check that Field Exists with MongoDB](https://stackoverflow.com/questions/19868016/check-that-field-exists-with-mongodb) – ArunPratap Dec 20 '18 at 10:44
@AnthonyWinzlet i want to check this for some particular id lets say for id :"1" is there place field exists. – Digvijay Dec 20 '18 at 10:50
2

You can still extend the given query: `db.collection.find({ "_id": "1", "Place": { "$exists": true } })` – mbuechmann Dec 20 '18 at 10:52
@mbuechmann how can i use callback with this query in order to perform some task based on result. – Digvijay Dec 20 '18 at 10:56
Thanks all for help finally got it. – Digvijay Dec 20 '18 at 12:50

How to check if field exists for a specified id in MongoDb

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