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

if you are using only object then

{
    $cond: {
        $and: [
            { if: { $eq: ["$$field1", 'A'] }, then: '10', else: 15 },
            { if: { $eq: ["$$field1", 'B'] }, then: '20', else: 15 },
            { if: { $eq: ["$$field1", 'C'] }, then: '10', else: 15 },
        ]
    }
}

And if you are Using Array find Data

{
    $map: {
        input: "$fields", as: "field1", in: {
            $cond: {
                $and: [
                    { if: { $eq: ["$$field1", 'A'] }, then: '10', else: 15 },
                    { if: { $eq: ["$$field1", 'B'] }, then: '20', else: 15 },
                    { if: { $eq: ["$$field1", 'C'] }, then: '10', else: 15 },
                ]
            }
        }
    }
}