$toString

Reference type:Cheat sheetFormat:Syntax + example + use case

Reference group: Conversion and type inspection

What it does

Converts supported values to strings; invalid conversions may error.

Syntax

{$toString: expression}

Use case

Export or integrate with string-based systems.

$toString: practical example

{ $project: { idText: { $toString: "$_id" } } }

💡 Explanation Converts supported values to strings; invalid conversions may error. When to use it Export or integrate with string-based systems.

Key Takeaways

Converts supported values to strings; invalid conversions may error.
Typical use: Export or integrate with string-based systems.

$toString

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