/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

0 vote145 views1 answer
Which Protect Presentation option protects a presentation from accidental changes:
TypeScript
0 vote127 views1 answer
Create 2 set A and B of size n1 and n2 . Print sets A and B.
TypeScript
4 votes142 views3 answers
Find distance between two points in opencv python
TypeScript
2 votes146 views1 answer
Ts date format dd/mm/yyyy
TypeScript
1 vote150 views1 answer
React make multiple fetch requests one after another
TypeScript
0 vote131 views1 answer
Get-dirstats not recognized
TypeScript
15 votes140 views2 answers
Typescript string to enum
TypeScript
0 vote128 views1 answer
React typescript pwa
TypeScript
1 vote128 views1 answer
Add correct host key in known_hosts to get rid of this message
TypeScript
0 vote167 views1 answer
Vba check if two sheets are the same
TypeScript