Im using mongoose, I have the following data of user collection:
[{
"_id": "1",
"notes": [
{
"value": "A90",
"text": "math"
},
{
"value": "A80",
"text": "english"
},
{
"value": "A70",
"text": "art"
}
]
},
{
"_id": "2",
"notes": [
{
"value": "A90",
"text": "math"
},
{
"value": "A80",
"text": "english"
}
]
},
{
"_id": "3",
"notes": [
{
"value": "A80",
"text": "art"
}
]
}]
and I have as a parameters the following array: [ "A90", "A80" ]
so I want to make a query to use this array to return only the records that have all the array items in the notes (value) table.
So for the example above it will return:
[{
"_id": "1",
"notes": [
{
"value": "A90",
"text": "math"
},
{
"value": "A80",
"text": "english"
},
{
"value": "A70",
"text": "art"
}
]
},
{
"_id": "2",
"notes": [
{
"value": "A90",
"text": "math"
},
{
"value": "A80",
"text": "english"
}
]
}]
I tried the following find query:
{ "notes": { $elemMatch: { value: { $in: valuesArray } } }}
but it returns a record even if just one element in valuesArray exist.
it turned out to be quite easy:
find({ "notes.value": { $all: arrayValues } })
Related
Given two collections users and activities, I want to enrich users.friends.user with all relevant activities, such that users.friends.user matches doc2.invitations.userId.
Below describes exactly what I would like:
user f24b189f-9e00-4d2b-b7f2-148a265fae7c is not a part of any activity, so their activities array is [].
user 223f2e04-6f0c-40a3-a88a-69d0127f2e92 is a part of an activity, so their activities array is populated with the activity object.
Raw:
db={
"users": [
{
"_id": "9c69a57f-e90a-43be-b559-449e973c6cba",
"__v": {
"$numberInt": "0"
},
"friends": [
{
"status": "ACCEPTED",
"user": "f24b189f-9e00-4d2b-b7f2-148a265fae7c"
},
{
"status": "ACCEPTED",
"user": "223f2e04-6f0c-40a3-a88a-69d0127f2e92"
}
]
}
],
"activities": [
{
"_id": {
"$oid": "63a92531bc6dea668f93bb06"
},
"invitations": [
{
"_id": {
"$oid": "63a92531bc6dea668f93bb07"
},
"userId": "9c69a57f-e90a-43be-b559-449e973c6cba",
"status": "ACCEPTED"
},
{
"_id": {
"$oid": "63a92544bc6dea668f93bb09"
},
"userId": "223f2e04-6f0c-40a3-a88a-69d0127f2e92",
"status": "ACCEPTED"
},
],
"__v": {
"$numberInt": "0"
}
}
]
}
Expected result:
"expectedResult": [
{
"_id": "9c69a57f-e90a-43be-b559-449e973c6cba",
"__v": {
"$numberInt": "0"
},
"friends": [
{
"status": "ACCEPTED",
"activities": [{
"_id": {
"$oid": "63a92531bc6dea668f93bb06"
},
"invitations": [
{
"_id": {
"$oid": "63a92531bc6dea668f93bb07"
},
"userId": "9c69a57f-e90a-43be-b559-449e973c6cba",
"status": "ACCEPTED"
},
{
"_id": {
"$oid": "63a92544bc6dea668f93bb09"
},
"userId": "223f2e04-6f0c-40a3-a88a-69d0127f2e92",
"status": "ACCEPTED"
},
],
"__v": {
"$numberInt": "0"
}
}]
},
{
"status": "ACCEPTED",
"activities": []
}
]
}
]
And here's a link to the playground.
I played around with aggregate and populate, but this use case is unlike a regular "join", which is throwing me off. Any pointers will be appreciated.
In my application, I have a section of comments and replies under some documents.
Here's how my database schema looks like
db.updates.insertOne({
"_id": "62347813d28412ffd82b551d",
"documentID": "17987e64-f848-40f3-817e-98adfd9f4ecd",
"stream": [
{
"id": "623478134c449b218b68f636",
"type": "comment",
"text": "Hey #john, we got a problem",
"authorID": "843df3dbbdfc62ba2d902326",
"taggedUsers": [
"623209d2ab26cfdbbd3fd348"
],
"replies": [
{
"id": "623478284c449b218b68f637",
"type": "reply",
"text": "Not sure, let's involve #jim here",
"authorID": "623209d2ab26cfdbbd3fd348",
"taggedUsers": [
"26cfdbbd3fd349623209d2ab"
]
}
]
}
]
})
db.users.insertMany([
{
"_id": "843df3dbbdfc62ba2d902326",
"name": "Manager"
},
{
"_id": "623209d2ab26cfdbbd3fd348",
"name": "John"
},
{
"_id": "26cfdbbd3fd349623209d2ab",
"name": "Jim"
},
])
I want to join those two collections, and replace user ids with complete user information on all levels. So the final JSON should look like this
{
"_id": "62347813d28412ffd82b551d",
"documentID": "17987e64-f848-40f3-817e-98adfd9f4ecd",
"stream": [
{
"id": "623478134c449b218b68f636",
"type": "comment",
"text": "Hey #john, we got a problem",
"author": {
"_id": "843df3dbbdfc62ba2d902326",
"name": "Manager"
},
"taggedUsers": [
{
"_id": "623209d2ab26cfdbbd3fd348",
"name": "John"
}
],
"replies": [
{
"id": "623478284c449b218b68f637",
"type": "reply",
"text": "Not sure, let's involve #jim here",
"author": {
"_id": "623209d2ab26cfdbbd3fd348",
"name": "John"
},
"taggedUsers": [
{
"_id": "26cfdbbd3fd349623209d2ab",
"name": "Jim"
}
]
}
]
}
]
}
I know how to do the $lookup on the top-level fields, including pipelines, but how can I do with the nested ones?
I have the following data, which describes who is going to do what work.
Basically I want to replace the "workId" and "userId" with objects that contain all the data from their respective documents and retain the "when" data.
I am starting with this data:
{
"schedule": {
"WorkId": "4e51dc1069c27c015ede4e3e",
"daily": [
{
"when": 1,
"U_W": [
{
"workId": "3a60dc1069c27c015ede1111",
"userId": "5f60c3b7f93d8e00a1cdf414"
},
{
"workId": "3a60dc1069c27c015ede1122",
"userId": "5f60c3b7f93d8e00a1cdf415"
}
]
}
]
}
}
Here is the user table
"userSchema": [
{
_id: "5f60c3b7f93d8e00a1cdf414",
Name: "Bob"
},
{
_id: "5f60c3b7f93d8e00a1cdf415",
Name: "Joe"
}
],
Here is the work table
"workSchema": [
{
_id: "3a60dc1069c27c015ede1111",
Name: "shovel"
},
{
_id: "3a60dc1069c27c015ede1122",
Name: "hammer"
}
]
what I want to end up with is this
{
"schedule": {
"WorkId": "4e51dc1069c27c015ede4e3e",
"daily": [
{
"when": 1,
"U_W": [
{
"work": {
"id": "3a60dc1069c27c015ede1111",
"name": "shovel"
},
"user": {
"id": "5f60c3b7f93d8e00a1cdf414",
"name": "bob"
}
},
{
"work": {
"id": "3a60dc1069c27c015ede1122",
"name": "hammer"
},
"user": {
"id": "5f60c3b7f93d8e00a1cdf415",
"name": "joe"
}
}
]
}
]
}
}
Here is my first attempt:
I have it joining the the two documents
How can I get rid of the duplicates ( bob:hammer and joe:shovel ) ?
and how do I include the "when" ?
Here is the playground that provides the following :
[
{
"_id": ObjectId("5a934e000102030405000000"),
"user_info": {
"Name": "Bob",
"_id": "5f60c3b7f93d8e00a1cdf414"
},
"work_role": {
"Name": "shovel",
"_id": "3a60dc1069c27c015ede1111"
}
},
{
"_id": ObjectId("5a934e000102030405000000"),
"user_info": {
"Name": "Bob",
"_id": "5f60c3b7f93d8e00a1cdf414"
},
"work_role": {
"Name": "hammer",
"_id": "3a60dc1069c27c015ede1122"
}
},
{
"_id": ObjectId("5a934e000102030405000000"),
"user_info": {
"Name": "Joe",
"_id": "5f60c3b7f93d8e00a1cdf415"
},
"work_role": {
"Name": "shovel",
"_id": "3a60dc1069c27c015ede1111"
}
},
{
"_id": ObjectId("5a934e000102030405000000"),
"user_info": {
"Name": "Joe",
"_id": "5f60c3b7f93d8e00a1cdf415"
},
"work_role": {
"Name": "hammer",
"_id": "3a60dc1069c27c015ede1122"
}
}
]
After beating my head against the wall for some time...
I found a pretty cool feature of mongo "references"
eg:
REF_work: { type: Schema.Types.ObjectId, required: true, ref: 'work' },
REF_person: { type: Schema.Types.ObjectId, required: true, ref: 'users' },
then when I call it from my get function I add a populate to the find
assignments.find(query).populate('daily.cp.REF_person').populate('daily.cp.REF_work');
I get exactly what I want:
[
{
"_id": ObjectId("5a934e000102030405000000"),
"REF_person": {
"Name": "Bob",
"_id": "5f60c3b7f93d8e00a1cdf414"
},
"REF_work": {
"Name": "shovel",
"_id": "3a60dc1069c27c015ede1111"
}
},
{
"_id": ObjectId("5a934e000102030405000000"),
"REF_person": {
"Name": "Joe",
"_id": "5f60c3b7f93d8e00a1cdf415"
},
"REF_work": {
"Name": "hammer",
"_id": "3a60dc1069c27c015ede1122"
}
}
]
I try to filter some results data from mongodb with mongoose in javascript.
This is my json structure:
{
"name": "john",
"firstname": "doe",
"yearold": 22,
"recipes": [
{
"title": "cheesecake",
"data": [
{
"name": "egg",
"label": "Eggs for",
"value": 6,
"unit": "piece"
},
{
"name": "oil",
"label": "Specific oil",
"unit": "oz",
"value": 0.2
},
{
"name": "flour",
"label": "Wholemel flour",
"value": 450,
"unit": "gr"
}
]
},
{
"title": "cake",
"data": [
{
"name": "egg",
"label": "Eggs for",
"value": 6,
"unit": "piece"
},
{
"name": "flour",
"label": "Wholemel flour",
"value": 500,
"unit": "gr"
},
]
}
]
}
In some case i need to return json data with hiding some values. For example I have a list that specifies all the values to hide
hidekeys=["egg"];
and i would like to get this:
{
"name": "john",
"firstname": "doe",
"yearold": 22,
"recipes": [
{
"title": "cheesecake",
"data": [
{
"name": "egg",
"label": "Eggs for",
"value": #######,
"unit": "piece"
},
{
"name": "oil",
"label": "Specific oil",
"unit": "oz",
"value": 0.2
},
{
"name": "flour",
"label": "Wholemel flour",
"value": 450,
"unit": "gr"
}
]
},
{
"title": "cake",
"data": [
{
"name": "egg",
"label": "Eggs for",
"value": #######,
"unit": "piece"
},
{
"name": "flour",
"label": "Wholemel flour",
"value": 500,
"unit": "gr"
},
]
}
]
}
For each recipe i need to hide ingredient value if it is specified in hidekeys.
I tried something with $project and $cond but it doesnt works
Here's a quick way of how to achieve this using $map
const hidekeys = ["egg"];
db.collection.aggregate([
{
$addFields: {
recipes: {
$map: {
input: "$recipes",
as: "recipe",
in: {
$mergeObjects: [
"$$recipe",
{
data: {
$map: {
input: "$$recipe.data",
as: "datum",
in: {
"$mergeObjects": [
"$$datum",
{
$cond: [
{
"$setIsSubset": [
[
"$$datum.name"
],
hidekeys
]
},
{
value: "#####"
},
{
value: "$$datum.value"
}
]
}
]
}
}
}
}
]
}
}
}
}
}
])
Mongo Playground
how can get the first element using in in mongo ?
if i've a list like ['car', 'house', 'cat', dog'], and a collection which contains many documents these element, i'd like to find the first document which contain cat, and first which contains dog etc.
I've tried to use limit() but in fact it gives me only one document, which can be either car, or dog or cat etc.
is there a way to combine a limit with $in ?
Thanks
EDIT:
example of data i've:
{
"_id": {
"$oid": "51d53ace9e674607e837d62d"
},
"sensors": [{
"name": "os-hostname",
"value": "yahourt"
}, {
"name": "os-domain-name",
"value": ""
}, {
"name": "os-platform",
"value": "Win32NT"
}, {
"name": "os-fullname",
"value": "Microsoft Windows XP Professional"
}, {
"name": "os-version",
"value": "5.1.2600.131072"
}],
"type": "os",
"serial": "2_os_os-hostname_yahourt"
} {
"_id": {
"$oid": "51d53ace9e674607e837d62e"
},
"sensors": [{
"name": "cpu-id",
"value": "_Total"
}, {
"name": "cpu-usage",
"value": 37.2257042
}],
"type": "cpu",
"serial": "2_cpu_cpu-id_total"
} {
"_id": {
"$oid": "51d53ace9e674607e837d62f"
},
"sensors": [{
"name": "cpu-id",
"value": "0"
}, {
"name": "cpu-usage",
"value": 48.90282
}],
"type": "cpu",
"serial": "2_cpu_cpu-id_0"
} {
"_id": {
"$oid": "51d53ace9e674607e837d630"
},
"sensors": [{
"name": "cpu-id",
"value": "1"
}, {
"name": "cpu-usage",
"value": 25.54859
}],
"type": "cpu",
"serial": "2_cpu_cpu-id_1"
} {
"_id": {
"$oid": "51d53ace9e674607e837d631"
},
"sensors": [{
"name": "volume-name",
"value": "C:"
}, {
"name": "volume-label",
"value": ""
}, {
"name": "volume-total-size",
"value": "52427898880"
}, {
"name": "volume-total-free-space",
"value": "20305170432"
}, {
"name": "volume-percent-free-space",
"value": "38"
}, {
"name": "volume-reads-per-second",
"value": 0.0
}, {
"name": "volume-writes-per-second",
"value": 9.324152
}, {
"name": "volume-read-bytes-per-second",
"value": 0.0
}, {
"name": "volume-write-bytes-per-second",
"value": 194141.6
}, {
"name": "volume-queue-length",
"value": 0.0
}],
"type": "disk",
"serial": "2_disk_volume-name_c"
}
You cannot add a limit to $in but you could cheat by using the aggregation framework:
db.collection.aggregate([
{$match:{serial:{$in:[list_of_serials]}}},
{$sort:{_id:-1}},
{$group:{_id:'$serial',type:{$first:'$type'},sensors:{$first:'$sensors'},id:{$first:'$_id'}}}
]);
Would get a list of all first found of each type.
Edit
The update will get the last inserted according to the _id.