Steps to finish (refresh) a mongoDB record

Currently, I am dealing with the following scenario:

An API request from one service is creating multiple MongoDB documents in a single collection. For example: 

[
{_id: 1, test1: 2, test: 3},
{_id: 2, test1: 3, test: 4}
]

Subsequently, a second service reads these documents and retrieves additional information. As a result, I am constructing an object like: 

[
{_id: 1,  newValue: 4},
{_id: 2,  newValue: 4}
]

Now comes my question: Is it possible to update all the documents at once using the "_id" value? The challenge is that I want to avoid updating each document individually due to their large number. Therefore, I am considering deleting all the existing documents and inserting them again with all the necessary information. What are your thoughts on this approach?

javascriptmongodbapinpm

Answer №1

To avoid the negative consequences of mass deletion followed by re-insertion, it is recommended to perform multiple updates in bulk using the bulkWrite method:

var bulkOperations = [];

for each item requiring processing {
        prepare _id and newValue ... ;
        bulkOperations.push({
          "updateOne": {
                    "filter": { "_id": targetId },
                    update: { $set: {"newValue": desiredValue } }
                }
            });
    });

// Execute a single batch of updates. This process could be enclosed within a transaction as well:
printjson( db.foo.bulkWrite(bulkOperations) );

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