MongoDB Update (Insert a List of Item to an Array)

Question

I want to add several items to arrays of several rows in Mongo. How can I do this?

I want to start with this:

{\'x\': \'h\', arr: [1,2,3] }
{\'x\':          


        

Answer 1

If you have a MongoDB collection named yourCollection and a record with the name x, you would update the subarray with something like this:

db.test.update( {"name":"x"}, {"$pushAll" : {arr : [1, 2, 3]}} )

The important keyword here is $pushAll. You can use it to add items to arrays inside of a single record attribute.