$$CURRENT
Reference group: Utility expressions and variables
What it does
References current document context; it often starts equal to $$ROOT but can change in scoped expressions.
Syntax
$$CURRENT
Use case
Understand expression scope.
$$CURRENT: practical example
{ $project: { currentId: "$$CURRENT._id" } }💡 Explanation
References current document context; it often starts equal to
$$ROOT but can change in scoped expressions.
When to use it
Understand expression scope.Key Takeaways
- References current document context; it often starts equal to
$$ROOTbut can change in scoped expressions. - Typical use: Understand expression scope.