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MongoDB update array of documents with new array of documents


MongoDB update array of documents with new array of documents

By : Wilson Lee
Date : October 17 2020, 03:08 PM
Any of those help You mean .bulkWrite(), which allows multiple update operations ( Insert/Update/Remove) on the same collection in a single batch request. It actually is what modern drivers really call when either .insert() or .insertMany() is called with an array of documents.
Your new update would be:
code :
var arrToUpdate = [
    {_id:0,name:"Dennis"},
    {_id:1,name:"Peter"},
    {_id:2,name:"Ghandi"}
];

collection.bulkWrite(
  arrToUpdate.map( d => ({
    "replaceOne": {
      "filter": { "_id": d._id },
      "replacement": d
    }
  })),
  function(err,result) {
    console.log(result)
  }
)


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MongoDB: how to update embeded documents in array

MongoDB: how to update embeded documents in array


By : user3736468
Date : March 29 2020, 07:55 AM
I wish this helpful for you You have to use $ poistional operator to update the embedded documents,
code :
db.Departments.update(
     { "_id" : ObjectId("4eb79ee1e60fc603788e7259"),
       "Subsidiaries._id" : ObjectId("4eb79eeae60fc603788e7271") },
     { "$set" : { "Subsidiaries.$.Location" : "City" } }
 )
MongoDB - update documents in an array

MongoDB - update documents in an array


By : gus
Date : March 29 2020, 07:55 AM
Does that help UPDATE
It is pretty obvious mindset to have collection like above to group documents. But having documents in array will result in some other problems. You have to suffer with Array Update operators to update each document. Instead, i restructured my collection as shown below. Also, see this google group discussion. As "idbentley" specified there is a possibility to exceed document size limit (16 MB) which will lead to data fragmentation. So be conscious while you model your data.
code :
{
        "_id" : ObjectId("51fa619a8e843042c0c24e46"),
        "uniqDates" : [
                ISODate("2013-07-30T18:30:00Z"),
                ISODate("2013-07-31T18:30:00Z")
        ]
}
{
        "_id" : ObjectId("51fa61b38e843042c0c24e47"),
        "eid" : 1,
        "title" : "Event 1",
        "start" : ISODate("2013-08-04T18:30:00Z")
}
{
        "_id" : ObjectId("51fa61b38e843042c0c24e48"),
        "eid" : 2,
        "title" : "Event 2",
        "start" : ISODate("2013-08-08T18:30:00Z")
}
db.schedule.find({"eid": {$exists: 1}});
db.schedule.find({"uniqDates": {$exists: 1}});
db.schedule.update({"eid": 3}, {"eid": 3, "title": "Event 3", 
                                "start": new Date(2013, 05, 06)}, true); 
Return values of specific columns of documents in array of documents in MongoDB shell

Return values of specific columns of documents in array of documents in MongoDB shell


By : parisny
Date : March 29 2020, 07:55 AM
should help you out I have documents stored in the following way in MongoDB: , You can specify what you want in your projection:
code :
db.a.find({},{'arr.col2' : 0, _id : 0})
Querying a MongoDB collection with documents containing an array of (sub)documents where ALL documents in the array matc

Querying a MongoDB collection with documents containing an array of (sub)documents where ALL documents in the array matc


By : Praveen Kumar
Date : March 29 2020, 07:55 AM
wish helps you At it's simplest form, this can be achieved with $nin.
db.collection.find({"comment.status" : {$nin : ["Spam" , "PendingReview"]}})
How to $pull documents in nested array of documents in MONGODB

How to $pull documents in nested array of documents in MONGODB


By : Md Shakil Ahmed
Date : March 29 2020, 07:55 AM
I wish this helpful for you Pull operator works by applying query as it was top level document so when the criteria finds the document it removes documents in organizationembedded array.
You've to use positional operator to remove documents in parentHierarchy embedded array.
code :
var condition={"organization.organizationId":condition.orgId}
var update={"organization.$.parentHierarchy":{"userId": userdata[0]._id}}
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