Menu
I have a query, that use $lookup to "join" two models, after this i use $project to select olny the fields that i need, but my $project brings an arrray of objects (user_detail) that contains more data that i need. I want only two fields (scheduleStart and scheduleEnd) of my result.
My query:
User.aggregate([{ $match: { storeKey: req.body.store, } }, { $group: { _id: { id: "$_id", name: "$name", cpf: "$cpf", phone: "$phone", email: "$email", birthday: "$birthday", lastName: "$lastname" }, totalServices: { $sum: "$services" }, } }, { $lookup: { from: "schedules", localField: "_id.phone", foreignField: "customer.phone", as: "user_detail" } }, { $project: { _id: 1, name: 1, name: 1, cpf: 1, phone: 1, email: 1, birthday: 1, totalServices: 1, totalValue: { $sum : "$user_detail.value" }, count: { $sum: 1 }, user_detail: 1 } }, Result of query:
count: 1 totalServices: 0 totalValue: 73 user_detail: Array(2) 0: ... paymentMethod: 0 paymentValue: "0" scheduleDate: "2018-10-02" scheduleEnd: "2018-10-02 08:40" scheduleStart: "2018-10-02 08:20" status: 3 store: "5b16cceb56a44e2f6cd0324b" updated: "2018-11-27T13:30:21.116Z" 1: ... paymentMethod: 0 paymentValue: "0" scheduleDate: "2018-11-27" scheduleEnd: "2018-11-27 00:13" scheduleStart: "2018-11-27 00:03" status: 2 store: "5b16cceb56a44e2f6cd0324b" updated: "2018-11-27T19:33:39.498Z" _id: birthday: "1992-03-06" email: "[email protected]" id: "5bfed8bd70de7a383855f09e" name: "Chris Santos G" phone: "11969109995" ... Result that i need:
count: 1 totalServices: 0 totalValue: 73 user_detail: Array(2) 0: scheduleEnd: "2018-10-02 08:40" scheduleStart: "2018-10-02 08:20" 1: scheduleEnd: "2018-11-27 00:13" scheduleStart: "2018-11-27 00:03" _id: birthday: "1992-03-06" email: "[email protected]" id: "5bfed8bd70de7a383855f09e" name: "Chris Santos G" phone: "11969109995" ... How can i do this with my query?
603
The $project takes a document that can specify the inclusion of fields, the suppression of the _id field, the addition of new fields, and the resetting of the values of existing fields. Alternatively, you may specify the exclusion of fields. Specifies the inclusion of a field.
$lookup performs an equality match on the localField to the foreignField from the documents of the from collection. If an input document does not contain the localField , the $lookup treats the field as having a value of null for matching purposes.
For performing MongoDB Join two collections, you must use the $lookup operator. It is defined as a stage that executes a left outer join with another collection and aids in filtering data from joined documents.
$group is used to group input documents by the specified _id expression and for each distinct grouping, outputs a document. $project is used to pass along the documents with the requested fields to the next stage in the pipeline.
You can use $lookup 3.6 syntax to $project the fields inside the $lookup pipeline
User.aggregate([ { "$lookup": { "from": "schedules", "let": { "id": "$_id.phone" }, "pipeline": [ { "$match": { "$expr": { "$eq": ["$customer.phone", "$$id"] }}}, { "$project": { "scheduleStart": 1, "scheduleEnd": 1 }} ], "as": "user_detail" }} ]) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
