I have a document that looks a bit like this:
> db.orders.find()
{
_id: ObjectId(),
_reminders: [{
notified: true,
timestamp: ISODate(),
completed: false
}]
}
{
_id: ObjectId(),
_reminders: []
}
What I am trying to find is a document in the orders collection where the "reminders" does not contain a reminder in a specific time range, and is not completed.
db.orders.find({
'_reminders': {
$elemMatch: {
completed: false,
timestamp: { $ne: time }
}
}
});
The problem is that this will not find an order which does not have any reminders at all.
How would one query this?
This should get you what you want
db.getCollection('Clock').find({
$or : [
{
_reminders : {
$elemMatch : {
timestamp : {
$lte : ISODate("2019-07-12T15:35:32.278Z"),
$gte : ISODate("2012-07-12T15:35:32.278Z")
},
completed : false
}
}
},
{
_reminders : {$size : 0}
},
{
_reminders : {$exists : false}
}
]
})
you should use $or query.
db.orders.find({$or: [ { _reminders: [] }, here_put_your_query_with_time_match ]}) - it will return both documents which match your query and these with empty _reminders
Related
say my database collection has
* user collection*
[
{id:'1'}
{id:'2'}
]
I have an array of object
[
{id:'1'}
{id:'2'}
{id:'3'}
]
I want the object that was not found in the collection.
I want
[
{id:'3'}
]
I'm currently have this
const records = await dbo
.collection('user collection')
.find({
'id': { $in: newArr },
})
.toArray();
I'm a bit stumped on what to do! ... hope someone can help Thanks!
Option 1:
Looks like this is what you need via the not in operation ( $nin ) when you need to check the not exisitng id in collection documents from provided array:
db.collection.aggregate([
{
$match: {
id: {
"$nin": [
1,
2
]
}
}
},
{
$group: {
_id: null,
"idnotIntheArray": {
$push: "$id"
}
}
}
])
Explained:
$match for any documents with id not in provided array.
$group all id's in an array
plaground1
Option 2:
And this is the option where you output only the array elements not existing in the collection:
db.collection.aggregate([
{
$group: {
_id: null,
ids: {
$push: "$id"
}
}
},
{
$project: {
missingFromCollection: {
"$setDifference": [
[
1,
5,
4
],
"$ids"
]
}
}
}
])
Explained:
Push all id elements from collection to array ids ( note this solution will not allow more then 16MB total size of id's )
Use $setDifference to identify the difference between the two arrays.
playground2
You can use this aggregation:
db.entity.aggregate([
{
$match : {
"myObjList.id" : 1
}
},
{
$unwind : "$myObjList"
},
{
$match : {
"myObjList.id" : 1
}
}
])
and my aggregation result:
{
"_id" : ObjectId("6225a0f78d435fd2845f1dd1"),
"myObjList" : {
"id" : 1
}
}
I have the following documents:
[{
"_id":1,
"name":"john",
"position":1
},
{"_id":2,
"name":"bob",
"position":2
},
{"_id":3,
"name":"tom",
"position":3
}]
In the UI a user can change position of items(eg moving Bob to first position, john gets position 2, tom - position 3).
Is there any way to update all positions in all documents at once?
You can not update two documents at once with a MongoDB query. You will always have to do that in two queries. You can of course set a value of a field to the same value, or increment with the same number, but you can not do two distinct updates in MongoDB with the same query.
You can use db.collection.bulkWrite() to perform multiple operations in bulk. It has been available since 3.2.
It is possible to perform operations out of order to increase performance.
From mongodb 4.2 you can do using pipeline in update using $set operator
there are many ways possible now due to many operators in aggregation pipeline though I am providing one of them
exports.updateDisplayOrder = async keyValPairArr => {
try {
let data = await ContestModel.collection.update(
{ _id: { $in: keyValPairArr.map(o => o.id) } },
[{
$set: {
displayOrder: {
$let: {
vars: { obj: { $arrayElemAt: [{ $filter: { input: keyValPairArr, as: "kvpa", cond: { $eq: ["$$kvpa.id", "$_id"] } } }, 0] } },
in:"$$obj.displayOrder"
}
}
}
}],
{ runValidators: true, multi: true }
)
return data;
} catch (error) {
throw error;
}
}
example key val pair is: [{"id":"5e7643d436963c21f14582ee","displayOrder":9}, {"id":"5e7643e736963c21f14582ef","displayOrder":4}]
Since MongoDB 4.2 update can accept aggregation pipeline as second argument, allowing modification of multiple documents based on their data.
See https://docs.mongodb.com/manual/reference/method/db.collection.update/#modify-a-field-using-the-values-of-the-other-fields-in-the-document
Excerpt from documentation:
Modify a Field Using the Values of the Other Fields in the Document
Create a members collection with the following documents:
db.members.insertMany([
{ "_id" : 1, "member" : "abc123", "status" : "A", "points" : 2, "misc1" : "note to self: confirm status", "misc2" : "Need to activate", "lastUpdate" : ISODate("2019-01-01T00:00:00Z") },
{ "_id" : 2, "member" : "xyz123", "status" : "A", "points" : 60, "misc1" : "reminder: ping me at 100pts", "misc2" : "Some random comment", "lastUpdate" : ISODate("2019-01-01T00:00:00Z") }
])
Assume that instead of separate misc1 and misc2 fields, you want to gather these into a new comments field. The following update operation uses an aggregation pipeline to:
add the new comments field and set the lastUpdate field.
remove the misc1 and misc2 fields for all documents in the collection.
db.members.update(
{ },
[
{ $set: { status: "Modified", comments: [ "$misc1", "$misc2" ], lastUpdate: "$$NOW" } },
{ $unset: [ "misc1", "misc2" ] }
],
{ multi: true }
)
Suppose after updating your position your array will looks like
const objectToUpdate = [{
"_id":1,
"name":"john",
"position":2
},
{
"_id":2,
"name":"bob",
"position":1
},
{
"_id":3,
"name":"tom",
"position":3
}].map( eachObj => {
return {
updateOne: {
filter: { _id: eachObj._id },
update: { name: eachObj.name, position: eachObj.position }
}
}
})
YourModelName.bulkWrite(objectToUpdate,
{ ordered: false }
).then((result) => {
console.log(result);
}).catch(err=>{
console.log(err.result.result.writeErrors[0].err.op.q);
})
It will update all position with different value.
Note : I have used here ordered : false for better performance.
I have a very loooong aggregate in my nodejs controller:
agentSaleModel.aggregate([
{
$match: {
$and:
[{
_id: { $in: req.body.propertyID },
active : true
}]
}
}, etc....
And it works great when I got elements in my req.body.propertyID
like ["property01","property02"] etc...
My problem is that I also want the aggregate to work when there are nothing in req.body.propertyID. (when its blank) - and then get all records.
This does not work:
agentSaleModel.aggregate([
{
$match: {
$and:
[{
_id: { $in: '' },
active : true
}]
}
}, etc....
So rather than doing an "if" with two huge sets of almost identical code:
if (req.body.propertyID) {
...the entire aggregate...
} else {
...the entire aggregate minus the _id: { $in: req.body.propertyID },...
}
Is there a smarter way to do this?
SOLUTION!! Thanks to FluffyNights :)
if (req.body.propertyID!='') {
var matchStr = {
$match: {
$and:
[{
_id: { $in: req.body.propertyID },
active : true
}]
}
}
} else {
var matchStr = {
$match: {
active : true
}
}
}
agentSaleModel.aggregate([ matchStr, etc..... (rest of pipeline)
you could do it like this:
let query = [
{
$match: {
$and:
[{
active : true
}]
}
}];
if(req.body.propertyID) {
query[0]["$match"]["$and"][0]["_id"] = { $in: req.body.propertyID };
}
agentSaleModel.aggregate(query, ...)
you could also use regex, like:
if(!req.body.properyID){
req.body.propertyID = [ ".*" ];
}
agentSaleModel.aggregate([
{
$match: {
$and:
[{
_id: { $in: req.body.propertyID },
active : true
}]
}
}, etc....
however, this might get slow.
Im not sure if passing null to $in would work the way you want, you could try it though.
What about trying to construct query before running it.
For example.
var query = req.body.propertyID ? { $and: [{_id: { $in: req.body.propertyID }, active : true}]} : {active : true}
agentSaleModel.aggregate([
{
$match: query
}, etc....
Hope this helps.
Here's an inline solution using computed property names:
$match: {
$and: [
{
_id: { [ req.body.propertyID ? '$in' : '$exists' ] : req.body.propertyID || true },
active: true,
},
],
}
When req.body.propertyID exists, the query becomes:
_id : { $in : req.body.propertyID }
If not:
_id : { $exists : true }
EDIT: this will also allow req.body.propertyID to equal "ALL" if you explicitly want to match all documents:
let selectAll = ! req.body.propertyID || req.body.propertyID === 'ALL';
const query = {
$match: {
$and: [
{
_id: { [ selectAll ? '$exists' : '$in' ] : selectAll || req.body.propertyID },
active: true,
},
],
},
};
Doc:
{
_id: 5150a1199fac0e6910000002,
name: 'some name',
items: [{
id: 23,
name: 'item name 23'
},{
id: 24,
name: 'item name 24'
}]
}
Is there a way to pull a specific object from an array? I.E. how do I pull the entire item object with id 23 from the items array.
I have tried:
db.mycollection.update({'_id': ObjectId("5150a1199fac0e6910000002")}, {$pull: {id: 23}});
However I am pretty sure that I am not using 'pull' correctly. From what I understand pull will pull a field from an array but not an object.
Any ideas how to pull the entire object out of the array.
As a bonus I am trying to do this in mongoose/nodejs, as well not sure if this type of thing is in the mongoose API but I could not find it.
try..
db.mycollection.update(
{ '_id': ObjectId("5150a1199fac0e6910000002") },
{ $pull: { items: { id: 23 } } },
false, // Upsert
true, // Multi
);
I have a document like
I have to delete address from address array
After searching lots on internet I found the solution
Customer.findOneAndUpdate(query, { $pull: {address: addressId} }, (err, data) => {
if (err) {
return res.status(500).json({ error: 'error in deleting address' });
}
res.json(data);
});
my database:
{
"_id" : ObjectId("5806056dce046557874d3ab18"),
"data" : [
{ "id" : 1 },
{ "id" : 2 },
{ "id" : 3 }
]
}
my query:
db.getCollection('play_table').update({},{$pull:{"data":{"id":3}}},{multi:true}
output:
{
"_id" : ObjectId("5806056dce046557874d3ab18"),
"data" : [
{ "id" : 1 },
{ "id" : 2 }
]
}
You can try it also:
db.getCollection('docs').update({ },{'$pull':{ 'items':{'id': 3 }}},{multi:true})
For a single record in array:
db.getCollection('documents').update(
{ },
{'$pull':{ 'items':{'mobile': 1234567890 }}},
{new:true}
);
For a multiple records with same mobile number in array:
db.getCollection('documents').update(
{ },
{
$pull: {
items: { mobile: 1234567890 }
}
},
{ new:true, multi:true }
)
Use $pull to remove the data
return this.mobiledashboardModel
.update({"_id": args.dashboardId}, { $pull: {"viewData": { "_id": widgetId}}})
.exec()
.then(dashboardDoc => {
return {
result: dashboardDoc
}
});
Kishore Diyyana:
If you want to remove all elements including the key of the element attributes list.
Here is the example of mongoDB unset operator:
db.UM_PREAUTH_CASE.update(
{ 'Id' : 123}, { $unset: { dataElements: ""} } )
JSON Look like this:
{ "Id":123,"dataElements" : [ { "createdBy" : "Kishore Babu Diyyana", "createdByUserId" : 2020 }, { "createdBy" : "Diyyana Kishore", "createdByUserId" : 2021 } ] }
I'm trying to increment a field in my mongodb document using the $inc operator. The field I am trying to increment is a sub-property of my document's count field, e.g.:
mydoc: {
count: {
schedules: 0
}
}
When I try this:
> db.mydocs.update({ _id: new ObjectId('4db5c2f3dc73c5afdaffd636') }, { $inc: { count.schedules: 1 } }, { upsert: true, safe: true }, null);
from my mongo shell, I get this error message:
Mon Apr 25 11:59:05 SyntaxError: missing : after property id (shell):1
I've tried several syntax variations with similar results. Do I need to take a different approach to this? I've verified my document exists and has a count.schedules field that is set to 0.
I can directly set the value using a command like this:
db.mydocs.update({ _id: new ObjectId('4db5c2f3dc73c5afdaffd636') }, { $set: { count: { schedules:1 } } }, null, null);
But if I try that syntax for the $inc operation, I get this error:
Modifier $inc allowed for numbers only
Thanks
Yes, you can do a $inc only on numbers. Here is how I tried to reproduce your problem, you can notice I've used proper quotes, which is the reason you are seeing the missing : after property id(shell):1 error.
> db.schedules.save({"mydoc": { "count": { "schedules": 0}}});
> db.schedules.find();
{ "_id" : ObjectId("4db5cf199e631c2a52a7c643"), "mydoc" : { "count" : { "schedules" : 0 } } }
> db.schedules.update({ _id: new ObjectId("4db5cf199e631c2a52a7c643") }, { $inc: { "mydoc.count.schedules": 1 } }, { upsert: true, safe: true }, null);
> db.schedules.find();
{ "_id" : ObjectId("4db5cf199e631c2a52a7c643"), "mydoc" : { "count" : { "schedules" : 1 } } }
Hope this helps!
I think this may be a simple fix. Try putting quotes around count.schedules like so:
db.mydocs.update({ _id: new ObjectId('4db5c2f3dc73c5afdaffd636') }, { $inc: { 'count.schedules': 1 } }, { upsert: true, safe: true }, null);