Mongodb copy documents from one collection to another python

Studio 3T’s convenient built-in copy and paste features allow you to copy or duplicate a MongoDB collection to another database in just a few clicks.

If you’re looking to copy entire MongoDB databases across servers, here’s that article.

Copy MongoDB collection

Select the source collection you want to copy and right-click it in the Connection Tree.

In our case, this is collection test.people on localhost.

Choose Copy Collection.

Mongodb copy documents from one collection to another python

Paste MongoDB collection

Select your target MongoDB database (or collection) that you want to copy your source collection to.

In our example, that is database “test” on server “ADX”.

Right-click your target and choose Paste Collection.

Mongodb copy documents from one collection to another python

Configure copy & paste

In the Paste Collection dialog, you can choose how the copy operation should treat (existing) document _ids.

Note that this usually only relevant when you decide to copy a collection into another, existing target collection.

If you paste a collection into a target database that already contains a collection with the same name, the source collection will be inserted with the prefix “Copy_of_”.

To finish, click Paste Collection. This will copy your source collection to your target.

Mongodb copy documents from one collection to another python

And just like that, your MongoDB collection is copied to another database and/or server.

You can always monitor your copy job on the bottom-left corner and cancel any long-running operations.


Mongodb Move Documents To Another Collection With Code Examples

Hello, everyone! In this post, we will investigate how to discover the answer to Mongodb Move Documents To Another Collection using the computer language.

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!")
}

As we’ve seen, a lot of examples were used to address the Mongodb Move Documents To Another Collection problem.

How do I move files from one collection to another in MongoDB?

collection). find(query).

  • create mongodb objects to connect to the database.
  • instantiate the bulk objects.
  • Obtain the source records that matches the filter criteria.
  • Loop through the source records.
  • When the record count to 1000, execute the target – bulk insertion and source – bulk removal.

How do I join a collection to another collection in MongoDB?

MongoDB is not a relational database, but you can perform a left outer join by using the $lookup stage. The $lookup stage lets you specify which collection you want to join with the current collection, and which fields that should match.

How do I clone a document in MongoDB?

To clone a document, hover over the desired document and click the Clone button. When you click the Clone button, Compass opens the document insertion dialog with the same schema and values as the cloned document. You can edit any of these fields and values before you insert the new document.

How do I copy a database in MongoDB to another database?

How we copy MongoDB database files

  • Stop MongoDB on the source server. It’s always a good idea to shut down any connections to mongod service before starting database backup.
  • Create a MongoDB database backup.
  • Copy MongoDB database files to the destination server.
  • Restore MongoDB database.
  • Access to users on the new server.

How do I move files from one collection to another?

Moving document from one collection to another

  • Use change streams to grab a document delete and write it to archive destination.
  • Use a $merge on the future deleted documents to write them to another collection than delete.

How do you transfer data from one collection to another?

MongoDB – copyTo() Method In MongoDB, copyTo() method is used to copies all the documents from one collection(Source collection) to another collection(Target collection) using server-side JavaScript and if that other collection(Target collection) is not present then MongoDB creates a new collection with that name.16-Mar-2021

Does MongoDB support query join between collections?

Does MongoDB supports query joins between collections ? No MongoDB doesnot supports query joins between collections.20-Jun-2022

What is sharding in MongoDB?

Sharding is the process of distributing data across multiple hosts. In MongoDB, sharding is achieved by splitting large data sets into small data sets across multiple MongoDB instances.11-Nov-2020

What is unwind in MongoDB?

What is MongoDB $unwind? The MongoDB $unwind operator is used to deconstruct an array field in a document and create separate output documents for each item in the array.02-Dec-2020

How do I fetch duplicate records in MongoDB?

How to Find Duplicates in MongoDB

  • Group all documents having the same value in field1.
  • Match the groups that have more than one document.
  • Project all groups that have more than one document.

How do I transfer data from one MongoDB file to another?

How to Migrate Data In MongoDB.
Create a zipped backup of the existing data..
Dump the data in a new DB..

How do I clone a document in MongoDB?

To clone a document, hover over the desired document and click the Clone button. When you click the Clone button, Compass opens the document insertion dialog with the same schema and values as the cloned document. You can edit any of these fields and values before you insert the new document.

How do I copy an index from one collection to another in MongoDB?

The following commands works for this scenario:.
Copy both index key and index options var indexes = db. user. getIndexes(); indexes. forEach(function(index){ delete index. v; delete index. ... .
Copy index key only (batch processing) var indexKeys = db. user. getIndexKeys(); db. usertest. createIndexes(indexKeys);.

What does .save do in MongoDB?

The save() returns a WriteResult() object that contains the status of the insert or update operation.