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Type:
Bug
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Resolution: Duplicate
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Priority:
Unknown
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None
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Affects Version/s: None
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Component/s: Change Streams, TypeScript
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Empty show more show less
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Not Needed
What problem are you facing?
I'm watching a stream on my node.js server and need the document _id. However, the typescript lib seem to show the wrong datatype and so I can't get the _id without ugly casts.
What driver and relevant dependency versions are you using?
Node.js 14.17.6
MongoDB 5.0.2
(npm) @types/mongodb 4.0.7
(npm) mongodb 4.1.2
Steps to reproduce?
const changeStream = collection.watch(undefined, { fullDocument: 'updateLookup',}) changeStream.on('change', (changeEvent: ChangeStreamDocument) => { const _id = changeEvent.documentKey._id }
I'm getting the error
Property '_id' does not exist on type 'ObjectId'.ts(2339)
When hoovering the changeEvent.documentKey it says
ChangeStreamDocument<Document>.documentKey?: ObjectId | undefined
However, if I log the changeEvent object I get
{
"_id": {
"_data": "82614AC8A6000000022B022C0100296E5A1004FD360DC87FAC4D5F84617FE81B0C267246645F696400646149E99E87EB1BC211F855480004"
},
"operationType": "update",
"clusterTime": {
"$timestamp": "7010636385245724674"
},
"fullDocument": {
"_id": "6149e99e87eb1bc211f85548",
... rest of the document
},
"ns": {
"db": "<database>",
"coll": "<collection>"
},
"documentKey": {
"_id": "6149e99e87eb1bc211f85548"
},
"updateDescription": {
"updatedFields": {
... updated fields
},
"removedFields": [],
"truncatedArrays": []
}
}
As you can see, the documentKey is not an ObjectId nor undefined, but an object containing _id which is an ObjectId.
- duplicates
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- Closed
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