如何遍历请求对象中的字符串？

Question

In Express, I'm trying to scan the POST requests and create the array openingTimes . And then create a MongoDB document , based on the inputs.

Following code snippet works fine but how can I make a loop instead of defining n days?

`module.exports.myController = function (request, response) {
    MongoDBModel.create({
        name: req.body.name,
 //I want to make a loop in here, so I dont have to define each day separately
        openingTimes: [{
            days: req.body.days1
            , opening: req.body.opening1
            , closing: req.body.closing1
            , closed: req.body.closed1
    }, {
            days: req.body.days2
            , opening: req.body.opening2
            , closing: req.body.closing2
            , closed: req.body.closed2
    }]
// catching errors
    }, function (err, location) {
        if (err) {
            sendJsonResponse(res, 400, err);
            console.log("error is " + err);
        }
        else {
            sendJsonResponse(res, 201, location);
        }
    });
};`

Answer 1

You could create the array beforehand (or inline with an IIFE that returns the array).

var numDays = 7;
var openingTimes = [];
for (var i = 1; i <= numDays; i++) {
    openingTimes.push({
        days: reg.body['days' + i],
        opening: req.body['opening' + i],
        closing: req.body['closing' + i],
        closed: req.body['closed' + i]
    });
}
MongoDBModel.create({
    name: req.body.name,
    openingTimes: openingTimes
}, etc);

Or with ES6, you could be creative and make an IIFE with a generator function.

const numDays = 7;
MongoDBModel.create({
    name: req.body.name,
    openingTimes: [...function*() {
        for (let i = 1; i <= numDays; i++) {
            yield {
                days: reg.body['days' + i],
                opening: req.body['opening' + i],
                closing: req.body['closing' + i],
                closed: req.body['closed' + i]
            };
        }
    }()]
}, etc);