SetStage interface

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SetStage interface

Add computed fields stage - equivalent to MongoDB's $addFields operator.

Adds new fields to documents or replaces existing fields with computed values. Uses the same expression syntax as $project, but retains all existing fields.

Signature:

interface SetStage

Example

{
  $set: {
    isOwner: { $eq: ['$role', 'owner'] },
    fullName: { $concat: ['$firstName', ' ', '$lastName'] }
  }
}

Properties

Property

Modifiers

Type

Description

$addFields

Dict