{delivery_rub: -33},
{delivery_rub: 150}
{delivery_rub: -33},
{delivery_rub: -150}
db.collection.update_many(
{"delivery_rub": {"$lt": 0}},
[
{
"$set": {
"delivery_rub": {
"$multiply": [
"$delivery_rub",
-1
]
}
}
}
])