在node.js中将函数与返回值一起使用

Question

I try to use function from extern module to create date

helper.js

function createDate() {
  var today = new Date();
  var dd = today.getDate();
  var mm = today.getMonth()+1; //January is 0!

  var yyyy = today.getFullYear();
  if(dd<10){
    dd='0'+dd;
  }
  if(mm<10){
    mm='0'+mm;
  }
  today = dd+'/'+mm+'/'+yyyy;
  return today;
}

module.exports = {
  f1: createDate,
};

And then use it in my server.js in line createdAT :

let helper = require('./helper.js');

app.post('/tasks',  function(req, res) {
  let savedata;
  console.log(req.body);
    let tmpData = [];
    for (let i = 0; i < req.body.length; i ++) {
      savedata = new Model({
        'taskName': req.body[i].taskName,
        'isDone': false,
        //'createdAt': Date.now(),
        'createdAt': helper.f1(),
        'prioraty': req.body[i].prioraty
      });
      tmpData.push(savedata)
    }
    savedata = tmpData;
    Model.collection.insert(savedata, function (err, result) {
      if (err) throw err;

      if (result) {
        res.json(result)
      }
    })
});

But it return me not the date in format dd/mm/yyyy but 2018-02-05T23:00:00.000Z The format is wrong and also the time...How could I fix this?

Answer 1

so from what i understand you don't need the to format the date before you insert it to your database what you actually need is to format the date when you return the response. here is a little bit tweak to your code:

change createDate() to accept date value from database

function createDate(dateFromDb) {
  var today = new Date(dateFromDb);
  var dd = today.getDate();
  var mm = today.getMonth()+1; //January is 0!

  var yyyy = today.getFullYear();
  if(dd<10){
    dd='0'+dd;
  }
  if(mm<10){
    mm='0'+mm;
  }
  today = dd+'/'+mm+'/'+yyyy;
  return today;
}

then uncomment the first //'createdAt': Date.now()

savedata = new Model({
    'taskName': req.body[i].taskName,
    'isDone': false,
    //'createdAt': Date.now(),
    'prioraty': req.body[i].prioraty
  });

then finally before you send the result do this

if (result) {
    result.createdAt = helper.f1(result.createdAt);
    res.json(result)
}