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$unset, $pop, $pull, $pullAll in MongoDB

Shah Solayman Sinha answered on November 11, 2023 Popularity 2/10 Helpfulness 1/10

answer $unset, $pop, $pull, $pullAll in MongoDB

$unset, $pop, $pull, $pullAll in MongoDB

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// Example: $unset
// Remove a field from a document.
db.users.updateOne({ name: 'Alice' }, { $unset: { location: 1 } });

// Example: $pop
// Remove the first or last element from an array field.
db.users.updateOne({ name: 'Bob' }, { $pop: { skills: 1 } }); // Removes the last element
db.users.updateOne({ name: 'Charlie' }, { $pop: { skills: -1 } }); // Removes the first element

// Example: $pull
// Remove specific elements from an array field.
db.users.updateOne({ name: 'David' }, { $pull: { skills: 'Express' } });

// Example: $pullAll
// Remove multiple specific elements from an array field.
db.users.updateOne({ name: 'Eva' }, { $pullAll: { skills: ['Python', 'Java'] } });

Popularity 2/10 Helpfulness 1/10 Language javascript

Source: chat.openai.com

Tags: javascript mongodb

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Contributed on Nov 11 2023

Shah Solayman Sinha

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$unset, $pop, $pull, $pullAll in MongoDB

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