how to add fields in a single document in mongodb

Question

I am new to MongoDB and I have the following documents:

{
    "_id":ObjectID("55b89409b7d7df8c3d201618"),  
    "name":"John" 
}, 
{ 
    "_id":ObjectID("55b14359b7d7df8c3d20161c"), 
    "name":"Bahubali",  
    "products":7,  
    "contact_no":8819936800 
}

I need to edit the document which has the name "John". I need to add more fields to this document. But, when I use update, it can update only the specific name field and when I use save, it replaces the existing document with new document.

Is there any other approach to add new fields to the above document without using save. Because whenever we use save, we will require to rewrite the whole document.

possible duplicate of [Add new field to a collection in MongoDB](http://stackoverflow.com/questions/7714216/add-new-field-to-a-collection-in-mongodb) — Neo-coder, Jul 29 '15 at 11:55

score 3 · Answer 1 · edited Jul 29 '15 at 15:14

3

You can use the $set operator for it:

Example:

db.products.update(
   { name: "John" },
   { $set:
      {
        quantity: 500,
        details: { model: "14Q3", make: "xyz" },
        tags: [ "coats", "outerwear", "clothing" ]
      }
   }
)

edited Jul 29 '15 at 15:14

bagrat

7,158
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answered Jul 29 '15 at 11:45

Man Programmer

5,300
2
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21

2

Edit this to be relevant to the information asked in the question and I'll give you a smiley stamp for your effort. Explain why it is better and two smiley stamps – Blakes Seven Jul 29 '15 at 11:47

score 0 · Answer 2 · answered Oct 26 '21 at 09:25

0

Try this in your mongoShell.

db.yourCollection.updateMany({"name":"john"}, {$set:{"products":7, "contact_no":8819936800}})

answered Oct 26 '21 at 09:25

Artaghal

21
5

how to add fields in a single document in mongodb

2 Answers2