delete document mongoose
Tank.deleteOne({ size: 'large' }, function (err) {
if (err) return handleError(err);
// deleted at most one tank document
});delete document mongoose
Tank.deleteOne({ size: 'large' }, function (err) {
if (err) return handleError(err);
// deleted at most one tank document
});mongoose remove element from array
db.survey.update( // select your doc in moongo
{ }, // your query, usually match by _id
{ $pull: { results: { $elemMatch: { score: 8 , item: "B" } } } }, // item(s) to match from array you want to pull/remove
{ multi: true } // set this to true if you want to remove multiple elements.
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