$unset

Removes specified fields from documents.

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Syntax

{ "$unset": "<fieldName>" }

{ "$unset": ["<field1>", "<field2>", ...] }

• Accepts either a single string or an array of field names.
• To remove nested fields, specify the path (for example "shipping.trackingNumber").

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✅ Basic Example

📌 Stage

{
  "$unset": "internal"
}

📥 Input

{
  "product": "Phone",
  "internal": true
}

📤 Output

{
  "product": "Phone"
}

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🧱 Deep Nested Pipeline Usage (Ecommerce)

[
  {
    "$unset": [
      "internal",
      "archived"
    ]
  }
]

📥 Input Document

{
  "name": "Shoes",
  "archived": false,
  "internal": true
}

📤 Output Documents

{
  "name": "Shoes"
}

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➕ Supported Accumulators

None for this stage

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🔧 Common Operators

None

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