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mongodb add or update document fields only if they don't exist

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Gleaming Goat answered on August 3, 2021 Popularity 9/10 Helpfulness 4/10

answer mongodb add or update document fields only if they don't exist

related add additional field in mongodb document if it is not exist while find one and update

mongodb add or update document fields only if they don't exist

Comment

-1

db.foo.update({'field': {$exists : false}}, {$set: {'field': ''}})
// for multiple update do this
db.foo.update({'field': {$exists : false}}, {$set: {'field': ''}}, false, true)

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: add document javascript mongodb

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Contributed on Aug 03 2021

Gleaming Goat

0 Answers Avg Quality 2/10

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add additional field in mongodb document if it is not exist while find one and update

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const filter = { name: 'Will Riker' };
const update = { age: 29 };

await Character.countDocuments(filter); // 0

let doc = await Character.findOneAndUpdate(filter, update, {
  new: true,
  upsert: true // Make this update into an upsert
});
doc.name; // Will Riker
doc.age; // 29

Popularity 6/10 Helpfulness 1/10 Language javascript

Source: mongoosejs.com

Tags: add document field find javascript javas

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Contributed on Mar 15 2022

dhruvin vaghasiya

0 Answers Avg Quality 2/10

add additional field in mongodb document if it is not exist while find one and update

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Using the upsert option, you can use findOneAndUpdate() as a 
find-and-upsert operation. An upsert behaves like a normal findOneAndUpdate() 
if it finds a document that matches filter. But, if no document matches filter, 
MongoDB will insert one by combining filter and update as shown below.


const filter = { name: 'Will Riker' };
const update = { age: 29 };

await Character.countDocuments(filter); // 0

let doc = await Character.findOneAndUpdate(filter, update, {
  new: true,
  upsert: true // Make this update into an upsert
});
doc.name; // Will Riker
doc.age; // 29

Popularity 6/10 Helpfulness 1/10 Language whatever

Source: mongoosejs.com

Tags: add document field find mongodb whatever w

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Contributed on Mar 15 2022

dhruvin vaghasiya

0 Answers Avg Quality 2/10

mongodb add or update document fields only if they don't exist

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mongodb add or update document fields only if they don't exist

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add additional field in mongodb document if it is not exist while find one and update

add additional field in mongodb document if it is not exist while find one and update

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