Qt 5.2.1: cannot parse date/time

Question

I am having a problem in parsing a date from QString using Qt 5.2.1...

I am using the following code:

QString value = "1979-10-27T04:00:00.000";
QDateTime dt = QDateTime::fromString(value, "yyyy'-'MM'-'dd'T'HH':'mm':'ss'.'zzz");

but the returned QDateTime is invalid... what am I doing wrong?

Are those single quotes supposed to be there in your format string? — Jongware, May 19 '14 at 08:30
There is no problem with your code. It is valid when i run it. — Nejat, May 19 '14 at 08:32
@Jongware, nope, not a dupe, the format here is correct. Morix, what do you mean by *invalid*? Which datetime value does your code return? — Frédéric Hamidi, May 19 '14 at 08:32
@FrédéricHamidi: you're right, I agree. Retracted to prevent others clicking "oh that must be it" :-) — Jongware, May 19 '14 at 08:35
Your code as-is works for me inside a dummy main. How are you determining that the date is invalid? — Mat, May 19 '14 at 08:36
Please see my own answer here below... thanks for your help anyway — Morix Dev, May 19 '14 at 08:45

score 2 · Accepted Answer · edited Jul 12 '19 at 20:55

This is likely due to the following bug in Creator:

GDB pretty printer for QDateTime is broken, shows “(invalid)” even when QDateTime is not invalid

According to the latest comment (01/Apr/14), it now displays a valid date until it's expanded:

It looks much better now. QDateTime shows a human-readable format. Only when I try to expand it, it becomes "not accessible".

I'd recommend upgrading your version of Creator.

With as many users as Qt has, you'll often find existing bug reports for your problem if you have a quick search through Jira.

score 1 · Answer 2 · answered May 19 '14 at 08:43

Thank you guys for you help: I think that the problem is definitively related to QtCreator (or at least to the debugger)...

I said that the QDateTime was not valid because the expression watch of QtCreator told me so (as you can see from the screenshot here below)... But if I qDebug() my datetime, then it appears correct...

Screenshot from my PC

Qt 5.2.1: cannot parse date/time

2 Answers2