MongoDB - Update objects remove item in send array in object (nested updating)

Question

this is my mongodb object

{
    "_id" : ObjectId("4faaba123412d654fe83hg876"),
    "user_id" : 123456,
    "posters" : [ 123456,1111,456789,3333]
}

i want to add an item to posters array , or remove one how could i do it ?

its nested updating.

i saw some question around stackoverflow , but i didnt found any answer how to remove object from the array , lets say 3333 there .

so the result will be :

{
    "_id" : ObjectId("4faaba123412d654fe83hg876"),
    "user_id" : 123456,
    "posters" : [ 123456,1111,456789]
}

Does this answer your question? Using MongoDB $pull to delete documents within an Array — whoami - fakeFaceTrueSoul
– whoami - fakeFaceTrueSoul, Commented Jan 23, 2020 at 21:03

Tom Slabbaert · Accepted Answer · 2020-01-23 21:04:20Z

0

db.collection.update(
    { posters: "3333" },
    { $pull: { posters: "3333" } },
    { multi: true }
)

answered Jan 23, 2020 at 21:04

Tom Slabbaert

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1 Comment

Please do not answer direct dups, let those be closed, that makes users do their homework first rather than posting everything they want :-)

Ananthu M · Accepted Answer · 2020-01-24 07:07:02Z

0

Use $push to add something into an array :

db.collection.update(
{ $push:
    {
        "posters" : "0000"
    }
}
)

Use $pull to remove something from an array:

db.collection.update(
{ $pull:
    {
        "posters" : "3333"
    }
}, True
)

answered Jan 24, 2020 at 7:07

Ananthu M

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