Error on chapter 1 first quiz on $match

[Ann_90310 (Ann Le)]

As I read through the doc on $match, it says that we can use aggregation expression in $match, but not in raw form. But the quiz say it’s wrong that

match can use both query operators and aggregation expressions

What are your opinions?

[Natac13 (Sean Campbell)]

Hey @Ann_90310

Because of the following, specifically that last sentence.

$match takes a document that specifies the query conditions. The query syntax is identical to the read operation query syntax; i.e. $match does not accept raw aggregation expressions. Instead, use a $expr query expression to include aggregation expression in $match .

$match can, if you use $expr, take aggregation expressions.

This is even a common bit of confusion among students.

Ch1 Lab2 Computing Fields: why aggregation doesn't work?

Hey @Rouslan_62970 Please review the docs for $match $match takes a document that specifies the query conditions. The query syntax is identical to the read operation query syntax; i.e. $match does not accept raw aggregation expressions. Instead, use a $expr query expression to include aggregation expression in $match . Therefore $match doesn’t take aggregate expression. It take query operators. Which looking at my first post will show the difference. UNLESS you use $expr