how to remove an array element by its index in mongodb

Rich Rabbit answered on May 4, 2021 Popularity 10/10 Helpfulness 1/10

answer how to remove an array element by its index in mongodb

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how to remove an array element by its index in mongodb

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> db.removeArrayElementByItsIndexDemo.update({}, {$unset : {"InstructorSubject.2" : 1 }});
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })

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Source: www.tutorialspoint.com

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Contributed on Aug 27 2021

Rich Rabbit

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remove an array element from mongodb

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const mongoose = require('mongoose');

// Define your schema
const mySchema = new mongoose.Schema({
  myArray: [String] // Replace "String" with the actual type of the elements in your array
});

// Create your model
const MyModel = mongoose.model('MyModel', mySchema);

// Remove an item from the array by index using a MongoDB query
const removeItemByIndex = async (documentId, arrayIndex) => {
  try {
    await MyModel.updateOne({ _id: documentId }, { $unset: { [`myArray.${arrayIndex}`]: 1 } });
    console.log('Item removed successfully.');
  } catch (error) {
    console.error(error);
  }
};

// Usage
removeItemByIndex('documentId', 2); // Replace 'documentId' with the actual ID of the document and '2' with the index of the item you want to remove

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Contributed on Jun 19 2023

john

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Mongodb Remove array element by index

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db.example.update({}, [
     {$set: {field: {
           $concatArrays: [ 
                  {$slice: ["$field", P]}, 
                  {$slice: ["$field", {$add: [1, P]}, {$size: "$field"}]}
           ]
     }}}
]);

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Source: stackoverflow.com

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Contributed on May 04 2021

Lerigou

0 Answers Avg Quality 2/10

how to remove an array element by its index in mongodb

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