Re: EOQualifier to qualify NSTimestamp by month
Re: EOQualifier to qualify NSTimestamp by month
- Subject: Re: EOQualifier to qualify NSTimestamp by month
- From: Mike Schrag <email@hidden>
- Date: Wed, 2 Jun 2010 10:56:33 -0400
admittedly, i could probably answer that more easily than you could at this point :)
On Jun 2, 2010, at 10:47 AM, Kieran Kelleher wrote:
> I never noticed your comment until 5 seconds ago!! :-)
>
> -Kieran
>
> On Jun 2, 2010, at 10:45 AM, Mike Schrag wrote:
>
>> you never responded to my comment btw :)
>>
>> ms
>>
>> On Jun 2, 2010, at 10:38 AM, Kieran Kelleher wrote:
>>
>>> FYI, prototypes of derived columns don't exactly work in EntityModeler. So you need to write the derived prototype config on a piece of paper and recreate those derived attributes from your notes on that piece of paper instead ;-)
>>>
>>> http://issues.objectstyle.org/jira/browse/WOL-1153
>>>
>>>
>>> On Jun 1, 2010, at 7:35 PM, Chuck Hill wrote:
>>>
>>>> Now there is a bit of smart thinking! Make it a prototype and you retain some measure of database independence.
>>>>
>>>> Chuck
>>>>
>>>>
>>>> On Jun 1, 2010, at 4:20 PM, Johnny Miller wrote:
>>>>
>>>>> Could he follow your advice, about using SQL, and create a derived column in his model and then use a standard qualifier against the derived column?
>>>>>
>>>>> On Jun 1, 2010, at 12:53 PM, Chuck Hill wrote:
>>>>>
>>>>>>
>>>>>> On Jun 1, 2010, at 3:30 PM, Joe Kramer wrote:
>>>>>>
>>>>>>> Hi all,
>>>>>>>
>>>>>>> I may be barking up the wrong tree here, but I wanted someone to confirm that for me. I have a simple Person EO with a NSTimestamp attribute for birthdate. I'm wondering if it is possible to create a qualifier to get all the people whose birthday is in a particular month (May, for example). The year doesn't matter so I can't do a simple ">" or "<". If this isn't possible (or efficient) I can change the data model to capture the birth month separately. Then I can just set the month programatically when a new person is created and use that value as the qualifier. Just curious what others think.
>>>>>>
>>>>>>
>>>>>> Define "possible". :-P The SQL way is
>>>>>>
>>>>>> select extract(MONTH from col_name) from table_name;
>>>>>>
>>>>>> So you could write a custom qualifier to do this. Generally, writing qualifiers ranks as "non trivial". I don't know of an existing qualifier that you can use. Depending on your needs, SQL might be the way to go. See EOSQLQualifier JavaDocs.
>>>>>>
>>>>>>
>>>>>> Chuck
>>>>>>
>>>>>> --
>>>>>> Chuck Hill Senior Consultant / VP Development
>>>>>>
>>>>>> Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
>>>>>> http://www.global-village.net/products/practical_webobjects
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>
>>>>> Johnny Miller
>>>>> Kahalawai Media Corp
>>>>> http://www.kahalawai.com
>>>>>
>>>>>
>>>>>
>>>>
>>>> --
>>>> Chuck Hill Senior Consultant / VP Development
>>>>
>>>> Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
>>>> http://www.global-village.net/products/practical_webobjects
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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