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Questions - objectid

de-duping items in a mongoose list of populate IDs

I have a mongoose object which contains an array of ObjectIds, being used for population from another table. I want to be able to dedupe these. eg I have [ '61e34f3293d9361bbb5883c7' ,'61e34f3293d9361...
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dcsan

arrays

mongodb

mongoose

objectid

Votes: 0

Answers: 0

Match with toObjectId in mongodb Aggregate

Really stuck with something that to me seems like it should be easy I want to essentially do is convert the string of an objectId to an objectId and match on that, but I can't figure out how to do it....
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Neville Bamshoot

mongodb

mongodb-query

nosql

aggregation-framework

objectid

Votes: 0

Answers: 1

Latest Answer

You can do it like this: db.collection.aggregate([ { "$match": { "$expr": { "$eq": [ "$App", { "$toObje...
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NeNaD

generate mongodb's ObjectId value from data in the doc

just to check if it is possible and if it worth the trouble: i'm using python 3.9.5, with mongoengine as ORM. lets say, i have data to to save in a collection: { "value": string, &qu...
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drizzt13

python-3.x

mongodb

hash

mongoengine

objectid

Votes: 0

Answers: 1

Latest Answer

If you assert value "plus" origin are truly unique, then just construct _id from both prior to insert. _id does not have to be autogenerated nor must it be an ObjectId type. var d = { &...
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Buzz Moschetti

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