Date in database is considered as String in front-end

Question

I want to save a date item in my database for logs of my website:

var LogSchema = new mongoose.Schema({
    date: Date,
    ... ...
})

To generate and save a log in the back-end:

log.date = new Date()
console.log(log.date.getTime()) // it works well
log.save(...)

When I check the database in mongo, it shows: "date" : ISODate("2017-12-02T01:51:44.540Z") .

However, in the front-end, when i want to read the log, log.date.getTime() gives an error TypeError: log.date.getTime is not a function . It seems that log.date is considered as a String rather than a Date .

Does anyone know what's wrong here?

Answer 1

You're mixing up a JavaScript Date object with an ISO Date string. When you save to the database, it does become a string. You have to convert the date string back into a javascript date object before you can use the getTime() method. Try:

var myDate = new Date(dateStringFromDatabase);
console.log(myDate.getTime());