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How to update array with multiple conditions in MongoDB
To update array with multiple conditions, use $push in MongoDB. Let us create a collection with documents −
> db.demo94.insertOne(
... {
...
... "Details" : [
... {
... "Name" : "Chris",
... "Subject" : []
... },
... {
... "Name" : "David",
... "Subject" : []
... },
... {
... "Name" : "Bob",
... "Subject" : []
... }
... ]
... }
... );
{
"acknowledged" : true,
"insertedId" : ObjectId("5e2d553bb8903cdd865577a9")
}Display all documents from a collection with the help of find() method −
> db.demo94.find();
This will produce the following output −
{
"_id" : ObjectId("5e2d553bb8903cdd865577a9"), "Details" : [
{ "Name" : "Chris", "Subject" : [ ] },
{ "Name" : "David", "Subject" : [ ] }, { "Name" : "Bob", "Subject" : [ ] }
]
}Following is the query to update array with multiple conditions in MongoDB −
> db.demo94.updateOne(
... {
...
... "Details": { "$elemMatch": { "Name": "David"}}
... },
... {
... "$push": { "Details.$.Subject": { "Subject": "MongoDB" }}
... }
...);
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }Display all documents from a collection with the help of find() method −
> db.demo94.find();
This will produce the following output −
{
"_id" : ObjectId("5e2d553bb8903cdd865577a9"), "Details" : [
{ "Name" : "Chris", "Subject" : [ ] },
{ "Name" : "David", "Subject" : [ { "Subject" : "MongoDB" } ] },
{ "Name" : "Bob", "Subject" : [ ] }
]
}
Updated on: 30-Mar-2020
568 Views
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