mongodb add to array if not exists
db.tags.update(
{name: 'sport'},
{$addToSet: { videoIDs: "34f54e34c" } }
);mongodb add to array if not exists
db.tags.update(
{name: 'sport'},
{$addToSet: { videoIDs: "34f54e34c" } }
);mongodb push to arry in update
db.collection.update({_id:xx}, {$push:{letters : {$each:['first one'], $position:0}}})mongodb add multiple element to array
db.students.update(
{ name: "joe" },
{ $push: { scores: { $each: [ 90, 92, 85 ] } } }
)mongodb push to arry in update
db.collection.update({_id:xx}, {$pop:{letters : -1}})insert item into list mongodb
db.col.update(
{ name: 'doc', 'list.id': 2 },
{$push: {'list.$.items': {id: 5, name: 'item5'}}}
)Copyright © 2021 Codeinu
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