Find object id in object ids array returns empty array using Mongoose
I think you need $elemMatch! From docs:
{ _id: 1, results: [ { product: "abc", score: 10 }, { product: "xyz", score: 5 } ] },{ _id: 2, results: [ { product: "abc", score: 8 }, { product: "xyz", score: 7 } ] },{ _id: 3, results: [ { product: "abc", score: 7 }, { product: "xyz", score: 8 } ] }Search like:
db.survey.find({ results: { $elemMatch: { product: "xyz", score: { $gte: 8 } } } })Results in:
{ "_id" : 3, "results" : [ { "product" : "abc", "score" : 7 }, { "product" : "xyz", "score" : 8 } ] }But since you're doing a single query condition (look at the docs again) you can replace
db.survey.find( { results: { $elemMatch: { product: "xyz" } } })with
db.survey.find( { "results.product": "xyz" })So in your case it should be something like:
find({ 'servicesProvided': ObjectId(req.params.service_id)})