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$set, $addToSet, $push, $each in MongoDB

Shah Solayman Sinha answered on November 11, 2023 Popularity 4/10 Helpfulness 2/10

answer $set, $addToSet, $push, $each in MongoDB

$set, $addToSet, $push, $each in MongoDB

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// Example: $set
// Update a document by setting a new field or updating an existing field.
db.users.updateOne({ name: 'Alice' }, { $set: { age: 29, location: 'New York' } });

// Example: $addToSet
// Add unique elements to an array field.
db.users.updateOne({ name: 'Bob' }, { $addToSet: { skills: 'MongoDB' } });

// Example: $push
// Add elements to an array field.
db.users.updateOne({ name: 'Charlie' }, { $push: { skills: 'Node.js' } });

// Example: $each with $push
// Add multiple elements to an array field.
db.users.updateOne({ name: 'David' }, { $push: { skills: { $each: ['React', 'Express'] } } });

// Example: $each with $addToSet
// Add multiple unique elements to an array field.
db.users.updateOne({ name: 'Eva' }, { $addToSet: { skills: { $each: ['Python', 'Java'] } } });

Popularity 4/10 Helpfulness 2/10 Language javascript

Source: chat.openai.com

Tags: javascript mongodb

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Contributed on Nov 11 2023

Shah Solayman Sinha

0 Answers Avg Quality 2/10

$set, $addToSet, $push, $each in MongoDB

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