如果在congo中进行cond [英] If else if cond in mongodb aggregation

问题描述

我知道这已经被问过了，但是我似乎找不到答案，如何在总计$ project中添加条件

I know this has been asked before but I can't seem to find the answer, how to add condition in aggregate $project

Schedul.aggregate([
    { $match: { flag: 1 } },
    {
        $project: {
            "name": "$name",
            "day_of_week": ("$day_of_week" === 0) ? 'Sunday' : ("$day_of_week" === 1) ? 'Monday' : ("$day_of_week" === 2) ? 'Tuesday' : ("$day_of_week" === 3) ? 'Wednesday' : ("$day_of_week" === 4) ? 'Thursday' : ("$day_of_week" === 5) ? 'Friday' : 'Saturday',
        }
    },
])

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