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Coincide con toObjectId en mongodb Aggregate

Realmente atrapado con algo que me parece que debería ser fácil

Básicamente, lo que quiero hacer es convertir la cadena de un objectId en un objectId y hacer coincidir eso, ¡pero no puedo encontrar la manera de hacerlo...!

Para ser claros , no puedo usar { x: ObjectId(someObjectId) } porque quiero serializar la consulta a JSON

Datos:

 [{ "_id": { "$oid": "5f37eaaae4102600180078a8" }, "Details": "Something A", "App": { "$oid": "5f37cec069106932d4710ea6" } },{ "_id": { "$oid": "5f3860f10a9db00018f2e2e3" }, "Details": "Something B", "App": { "$oid": "5f37cec069106932d4710ea6" } },{ "_id": { "$oid": "5f3908a7db8fd70018b19942" }, "Details": "Something C", "App": { "$oid": "5f37cec069106932d4710ea7" } },{ "_id": { "$oid": "5f390961db8fd70018b19945" }, "Details": "Something D", "App": { "$oid": "5f37cec069106932d4710ea8" } } ]

Y consulta con algo como:

 [ { '$match': { 'App': { '$eq': { '$toObjectId': '5f37cec069106932d4710ea8' } } } } ]

el resultado obviamente es:

 { "_id": { "$oid": "5f390961db8fd70018b19945" }, "Details": "Something D", "App": { "$oid": "5f37cec069106932d4710ea8" } }
over 4 years ago · Santiago Trujillo
1 answers
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Puedes hacerlo así:

 db.collection.aggregate([ { "$match": { "$expr": { "$eq": [ "$App", { "$toObjectId": "5f37cec069106932d4710ea8" } ] } } } ])

ejemplo de trabajo

over 4 years ago · Santiago Trujillo Report
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