Re: Date-Only NSTimestamps
Re: Date-Only NSTimestamps
- Subject: Re: Date-Only NSTimestamps
- From: Chuck Hill <email@hidden>
- Date: Wed, 2 Jan 2008 13:03:07 -0800
On Jan 2, 2008, at 12:37 PM, David LeBer wrote:
On 2-Jan-08, at 3:18 PM, Chuck Hill wrote:
On Jan 2, 2008, at 12:01 PM, David Avendasora wrote:
Hi all,
I am working on some date-related calculations for a report. On
the report the user specifies a date, and I want to match to a
NSTimestamp-typed attribute in my Entity. The problem is that, of
course, the attribute also contains time information which for
this report is meaningless.
I've come up with a couple ways to achieve what I'm trying to do,
and they seem to work, but they feel _very_ clunky and overly
difficult, which brings me back to the old WO axiom: if it's
hard, you're probably not doing it the WO-way.
That is a mis-quote. The actual axiom is "if it's hard, you're
probably not doing it the WO-way unless you are working with
dates". :-)
I was going to say the same thing. To be fair to WO, Java dates are
a pain for everyone. Though why they had to deprecate all of the
date utility methods in NSTimestamp I'll never know (OK, I actually
do know, more compatible with pure Java and all that, doesn't mean
I like it).
Yeah, it is NOT a WO thing. Dates in Java are just nasty.
So, what are the best practices for working with an NSTimestamp
field, when all you really want is the date, not the time?
There isn't any that I am aware of. I usually "normalize" these
to noon in the setXXXDate() methods.
Oooh, that Chuck, he's a smart one!
I have my rare moments.
I have a bunch of NSTimestamp utility methods like startOfDay and
endOfDay that I use to create qualifiers with (sudo qualifier:
entity.theDate >= TSUtilities.startOfDay(theQueryDate) &&
entity.theDate <= TSUtilities.endOfDay(theQueryDate)).
We have the same thing. I use it where I do need to store the exact
time but need to query on date ranges.
Chuck
--
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems.
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