Omit the aggregation stage when its parameter is empty/unset

[zhangtemplar]

For example, I have such endpoint:

{
    'datasource': {
        'source': 'project',
        'aggregation': {
            'pipeline': [
                {"$match": "$where"},
                {
                    "$lookup": {
                        "from": "user",
                        "localField": "creatorId",
                        "foreignField": "id",
                        "as": "creator",
                    },
                },
                {'$unwind': '$creator'},
                {'$match': "$extraWhere"},
                {"$sort": "$order"},
                {"$project": "$projection"}
            ]
        }
    }
}

Sometimes, I don't have $extraWhere provided. In this case, could eve simply remove this stage from the aggregation pipeline?

[nicolaiarocci]

Yes, would be a nice feature to have.

[zhangtemplar]

#1210

[zhangtemplar]

@nicolaiarocci #1210 is ready.