Aggregate.prototype.redact()

Parameters

• expression «Object» redact options or conditional expression

• [thenExpr] «String|Object» true case for the condition

• [elseExpr] «String|Object» false case for the condition

Returns:

• «Aggregate» this

Appends a new $redact operator to this aggregate pipeline.

If 3 arguments are supplied, Mongoose will wrap them with if-then-else of $cond operator respectively If thenExpr or elseExpr is string, make sure it starts with , like DESCEND, PRUNE or KEEP.

Example:

Model.aggregate(...)
 .redact({
   $cond: {
     if: { $eq: [ '$level', 5 ] },
     then: '$$PRUNE',
     else: '$$DESCEND'
   }
 })
 .exec();
// $redact often comes with $cond operator, you can also use the following syntax provided by mongoose
Model.aggregate(...)
 .redact({ $eq: [ '$level', 5 ] }, '$$PRUNE', '$$DESCEND')
 .exec();