Re: Date-Only NSTimestamps
Re: Date-Only NSTimestamps
- Subject: Re: Date-Only NSTimestamps
- From: David LeBer <email@hidden>
- Date: Wed, 2 Jan 2008 15:37:18 -0500
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).
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 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)).
Yes, it's fugly... Depending on your needs Chuck's solution is
probably vastly less so.
;david
--
David LeBer
Codeferous Software
'co-def-er-ous' adj. Literally 'code-bearing'
site: http://codeferous.com
blog: http://davidleber.net
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--
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http://tacow.org
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