mongodb empty an array field
db.collection.update({}, { $set : {'myArray': [] }} , {multi:true} )mongodb empty an array field
db.collection.update({}, { $set : {'myArray': [] }} , {multi:true} )mongodb unwind
{
$unwind:
{
path: <field path>,
includeArrayIndex: <string>,
// to include documents whose sizes field is null, missing, or an empty array.
preserveNullAndEmptyArrays: <boolean>
}
}Copyright © 2021 Codeinu
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