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mongodbHow to use unwind in MongoDB?

Unwind is an operator in MongoDB that allows you to deconstruct an array field from the input documents to output a document for each element in the array.


        $unwind: "$arrayField"

Output example

{ _id: 1, arrayField: "a" }
{ _id: 1, arrayField: "b" }
{ _id: 1, arrayField: "c" }

Code explanation

  • $unwind: the operator used to deconstruct the array field
  • arrayField: the array field to be deconstructed

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