Is there an elseif thing in MongoDB to $cond while aggregating

Question

So I need a custom field calculated in MongoDB as follows

if( field1 ==\"A\")  ->customfield=10
else if(field1 ==\"B\"  )->customfield=20
else (field1 ==\"         


        

Answer 1

MongoDB 3.4 has a new thing called $switch for this exact thing!

$switch: {
   branches: [
      { case: , then:  },
      { case: , then:  },
      ...
   ],
   default: 
}

https://docs.mongodb.com/manual/reference/operator/aggregation/switch/