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Corrected expresion $$REMOVE #3227

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Corrected expresion $$REMOVE #3227

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4 changes: 2 additions & 2 deletions source/reference/operator/aggregation/project.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,7 @@ Definition
.. versionchanged:: 3.6

MongoDB 3.6 adds the variable :variable:`REMOVE`. If the
the expression evaluates to ``$$REMOVE``, the field is
the expression evaluates to ``$REMOVE``, the field is
excluded in the output. For details, see :ref:`remove-var`.

* - ``<field>:<0 or false>``
Expand Down Expand Up @@ -373,7 +373,7 @@ variable to excludes the ``author.middle`` field only if it equals ``""``:
"author.middle": {
$cond: {
if: { $eq: [ "", "$author.middle" ] },
then: "$$REMOVE",
then: "$REMOVE",
else: "$author.middle"
}
}
Expand Down