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[09:31:29] <Swahili> Q: When using `updateMany`, the field we're updating is override by the new data. I'd have to get each individual field data and extend or is there a way to add to field?

[09:32:40] <Swahili> What I have is `Collection.updateMany({ _id: { $in: listOfIDs } }, { $set: { field: ARRAY } })`

[09:33:14] <Swahili> Where `field` is the field I want to update with an Array or an array list item/value : )

[09:35:52] <Swahili> I'll test `push`. as in `Collection.updateMany({ _id: { $in: listOfIDs } }, { $push: { field: ARRAY } })`

[14:43:41] <Swahili> Q: Is this ok in mongo? { [foobar === "remove" ? "$pull" : "$addToSet"]: { field: xxx } }

[14:44:14] <Swahili> for `update` in .updateMany(filter, update)