/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 vote178 views1 answer
Github sync local with remote
TypeScript
47 votes259 views9 answers
Cannot be loaded because running scripts is disabled on this system
TypeScript
0 vote168 views1 answer
See all github issue comments i made site:stackoverflow.com
TypeScript
0 vote171 views1 answer
Discord.py rewrite on reaction
TypeScript
1 vote202 views2 answers
Property 'userId' does not exist on type 'Session & Partial<SessionData>'.ts(2339)
TypeScript
3 votes164 views1 answer
Angular resize window height event
TypeScript
0 vote178 views1 answer
Node js if url is image
TypeScript
0 vote160 views1 answer
Wordpress posts sidebar with category link programmatically
TypeScript
0 vote165 views1 answer
Add correct host key in /root/.ssh/known_hosts to get rid of this message
TypeScript
1 vote263 views3 answers
Stripe create subscription
TypeScript