Batch update with Mongoose

Question

I\'m pulling data from a RETS(XML) feed and saving it in a local MongoDB using node and mongoose.

Periodically I need to update the documents and delete the inactive one

Answer 1

For completeness, If any one has multiple query conditions and want to add new fields for every matching documents of query condition then we can go with

 var bulk = Person.collection.initializeUnorderedBulkOp();
   bulk.find(query1).update(update1);
   bulk.find(query2).update(update2);
   bulk.execute(callback);

In following documentation It is said that db.collection.initializeUnorderedBulkOp()

Initializes and returns a new Bulk() operations builder for a collection. The builder constructs an unordered list of write operations that MongoDB executes in bulk. MongoDB executes in parallel the write operations in the list.

https://docs.mongodb.org/v3.0/reference/method/db.collection.initializeUnorderedBulkOp/