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Type:
Bug
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Resolution: Works as Designed
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Priority:
Major - P3
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None
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Affects Version/s: 4.3.6
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Component/s: Aggregation Framework
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Labels:None
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ALL
Hey, this is Thomas with the Node.js driver team!
I had a user report this case and I'm passing it up. This seems like odd behavior to me, perhaps there's a way of escaping that I'm not aware of.
For some reason when updateOne is passed a pipeline that `$sets` and the values in that document start with a `$` an update does not take place, it actually removes the property if it exists. If not it will do nothing. I've tried updating strings like `a$a` and they work as expected.
Here's an example from the shell (4.3.6)
> db.meow.insert({ name: 'tom' })
WriteResult({ "nInserted" : 1 })
> const cat = db.meow.findOne()
> db.meow.updateOne({ _id: cat._id }, [{ $set: { password: '$anything' }}])
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 0 }
> db.meow.findOne()
{ "_id" : ObjectId("5ef65b23f330c5e7e431c975"), "name" : "tom" }
> db.meow.updateOne({ _id: cat._id }, [{ $set: { password: 'anything' }}])
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }
> db.meow.findOne()
{
"_id" : ObjectId("5ef65b23f330c5e7e431c975"),
"name" : "tom",
"password" : "anything"
}