Re: NSPredicateEditor and date comparisons
Re: NSPredicateEditor and date comparisons
- Subject: Re: NSPredicateEditor and date comparisons
- From: email@hidden
- Date: Sun, 07 Dec 2008 21:16:29 -0500
I remember, way long ago in the past, having to supply a time
component to go with a date component - otherwise some seemingly
"random" time was inserted which then threw off anything else I did.
If I only needed a date (from a datetime field), I had to format it
that way (as only a date, and in the format I needed) and do some
seemingly-odd comparison (like comparing two strings). It worked, so
I didn't care past that point.
Quoting Chris Idou <email@hidden>:
Would your time zone happen to somehow correspond to 8:00 ?
Try doing a setDateValue on the gui component before you start, with
a particular time. I've got a suspicion that it will then leave the
time component alone. When you got a result of 13:41:40, might that
have been the time you ran the program?
--- On Sun, 7/12/08, Josh Abernathy <email@hidden> wrote:
From: Josh Abernathy <email@hidden>
Subject: Re: NSPredicateEditor and date comparisons
To: email@hidden
Cc: "Cocoa-Dev List" <email@hidden>
Received: Sunday, 7 December, 2008, 5:00 PM
Ah, yes, that would be the more accurate way to explain it.
I have an NSDatePicker in my NSPredicateEditor and no funny
business is going on with conversions. It's just the
simple default, setup-in-IB usage.
So I guess the question is better put: is there any
guarantee about the time of an NSDatePicker in an
NSPredicateEditor?
I created a quick test of an NSDatePicker outside an
NSPredicateEditor and its default time seems to be 8:00:00.
On Dec 7, 2008, at 5:57 PM, Chris Idou wrote:
>
> I'm a bit confused by your post. NSPredicateEditor
doesn't compare any dates, it just creates NSPredicates.
Maybe you're saying that if you have a NSDatePicker in
your NSPredicateEditor, that it creates a predicate with a
date set to 13:41:40. If that's the case, then it
probably has more to do with the NSDatePicker than
predicates. Unless you're converting the predicate to a
string, which introduces more complications.
NSPredicateEditor tends to just call objectValue on the gui
component, so try calling that yourself on your NSDatePicker
and see what happens.
>
> --- On Sun, 7/12/08, Josh Abernathy
<email@hidden> wrote:
>
>> From: Josh Abernathy <email@hidden>
>> Subject: NSPredicateEditor and date comparisons
>> To: "Cocoa-Dev List"
<email@hidden>
>> Received: Sunday, 7 December, 2008, 11:14 AM
>> Hi all,
>>
>> In my application, users have the option of
comparing to a
>> date in an NSPredicateEditor. For the NSDates it
is
>> comparing against, only the date is important;
time
>> doesn't matter.
>>
>> The interesting thing I found about
NSPredicateEditor is
>> the NSTimeInterval it compares my NSDates to has
the time
>> set to 13:41:40. That means my NSDates with the
default
>> 12:00:00 time don't match an "is"
predicate.
>> It's not a big deal because I can just change
my
>> NSDate's time to 13:41:40 to fix the problem.
>>
>> But what I'm wondering is if this is
guaranteed to
>> always be true. I couldn't find it anywhere in
the
>> documentation.
>>
>> Thanks,
>> Josh
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