/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

3 votes156 views1 answer
For of loop in ts with index
TypeScript
0 vote149 views1 answer
Typescript event emitter
TypeScript
0 vote163 views2 answers
Module '"@angular/fire"' has no exported member 'AngularFirestore'
TypeScript
1 vote160 views1 answer
How do i remove the brackets around a list in python
TypeScript
0 vote161 views1 answer
Checked a element is focused with its key pressed
TypeScript
0 vote171 views1 answer
Nmap find all hosts on a network
TypeScript
1 vote145 views1 answer
Firefox hsts clear
TypeScript
9 votes181 views1 answer
Print list without brackets int python
TypeScript
0 vote173 views1 answer
Push array elements if not exists mongoose
TypeScript
0 vote182 views1 answer
How to combine pdf documents C#
TypeScript