calling a function inside mongoose hook 'post save' returns same doc - express

Question

In my schema I'm having a post save hook like
DateInfoSchema.post('save', function (doc) {
var newDoc = helper. getListTimeRate(doc);
console.log(newDoc);
});
Then I'm having a helper module in that I'm having a function to calculate date range
lets consider 'doc' startdate and enddate so I want to calculate date range from start date to enddate
module.exports = {
getListTimeRate: function (data, yearEndDate) {
var toDate = new Date(),
weekName = ["Sun","Mon","Tue","Wed","Thu","Fri","Sat"];
Date.prototype.addDays = function(days) {
var dateAdd = new Date(this.valueOf());
dateAdd.setDate(dateAdd.getDate() + days);
return dateAdd;
};
function getDates(startDate, stopDate) {
var dateArray = [];
var currentDate = startDate;
if (currentDate == undefined){
while (currentDate <= stopDate) {
dateArray.push(currentDate);
currentDate = currentDate.addDays(1);
}
return dateArray;
}else {
var newCurrentDate = new Date(currentDate.toISOString().substr(0,10));
var newStopDate = new Date(stopDate.toISOString().substr(0,10));
while (newCurrentDate <= newStopDate) {
dateArray.push(newCurrentDate);
newCurrentDate = newCurrentDate.addDays(1);
}
return dateArray;
}
}
function calcRange(entry) {
// function get time
var dateList = [],
newList = [];
if (toDate < entry.endDate) {
// calc from endDate
newList = getDates(entry.startDate, entry.endDate);
//status often
selectDateFromOften();
} else {
if (yearEndDate) {
newList = getDates(entry.startDate, entry.endDate);
} else {
newList = getDates(entry.startDate, toDate);
}
// calc from toDate
//status often
selectDateFromOften();
}
function getDateTimeAnother() {
if (entry.hour) {
var setHour = entry.hour.getHours(),
setMin = entry.hour.getMinutes(),
setSecond = entry.hour.getSeconds();
}
dateList.forEach(function(entryDate){
entryDate.setHours(setHour);
entryDate.setMinutes(setMin);
entryDate.setSeconds(setSecond);
});
entry.rangeDate = dateList;
var compareUsedDate = [];
_.forEach(entry.frequencyId, function(value) {
compareUsedDate.push(value.dateRated);
});
entry.rangeDate = _.differenceBy(entry.rangeDate, compareUsedDate,Math.floor);
entry.rangeDate = entry.rangeDate.filter(function( element ) {
return element !== undefined;
});
console.log(dateList);
if (yearEndDate) {
return dateList;
}
}
function selectDateFromOften() {
switch(entry.oftenStatus) {
// Daily
case "0":
for (var i = 0; i< newList.length; i++) {
dateList.push(newList[i]);
}
getDateTimeAnother();
break;
//Weekly
case "1":
for (var i = 0; i< newList.length; i++) {
if (i == 0 || i % 7 == 0) {
dateList.push(newList[i]);
}
}
getDateTimeAnother();
break;
//Bi-Weekly
case "2":
for (var i = 0; i< newList.length; i++) {
if (i == 0 || i % 14 == 0) {
dateList.push(newList[i]);
}
}
getDateTimeAnother();
break;
//Monthly
case "3":
// for (var i = newList.length-1; i >= 0; i--) {
for (var i = 0; i< newList.length; i++) {
if (i == 0 || i % 28 == 0) {
dateList.push(newList[i]);
}
}
getDateTimeAnother();
break;
//Custom Date
case "4":
dateList = newList;
getDateCustom();
break;
default:
}
}
}
if (data.length) {
_.forEach(data, function(entry) {
if(entry.startDate != undefined){
calcRange(entry);
}
});
} else {
if(data.startDate != undefined){
calcRange(data);
}
}
return data;
}
};
But inside the hook 'newDoc' doesn't have 'rangeDate' field in it. Can anyone help me solve this issue? Thank you.