Re: Booleans
Re: Booleans
- Subject: Re: Booleans
- From: David Griffith <email@hidden>
- Date: Thu, 11 Mar 2004 11:53:14 +0100
Hi,
Yes, I have actually searched and read a lot of the articles on the list
relating to booleans, although the way I have done it appeared to be one of
the suggested ways. However it does not work.
Does anyone else recommend that I change this to use a 1 and 0 in the
database? Does this appear to be the problem?
Regards,
Dave.
> Kevin,
>
> Look at the heading "Value Type" on this page:
> http://developer.apple.com/documentation/WebObjects/UsingEOModeler/
> 4WorkingWithAttributes/chapter_4_section_3.html
>
> Search the list archives if you wish .... you will find some previous
> threads on this.
>
> Handling booleans has been discussed many times on the list and there
> are two or three common methods of managing them. From what I can
> remember, developers have been using 1 and 0 to represent true and
> false at the database level. Some then map it to java.lang.Boolean
> using 'c' as the value type just as the link above shows. Others, like
> me, use a "cover" method ..... for example isShipped is a cover method
> with boolean get and set for the real attribute isShippedInteger which
> is a short int.
>
> Check out this link for download link for Joseph Moreno's WO
> Conventions document which has some info on handling booleans:
> http://homepage.mac.com/kelleherk/iblog/C1216817469/E141295339/
> index.html
>
>
> Also, the prototypes available for MySQL here may be of use:
> http://homepage.mac.com/kelleherk/iblog/C711669388/E80430015/index.html
>
> -Kieran
>
> ________________________________________________________________
> Config = OS X 10.3.2 / Java 1.4.1 / WO 5.2.2 / MySQL 4.0.18 /
> Connector-J 3.0.11
> Blog: http://webobjects.webhop.org/
>
>
> On Mar 10, 2004, at 8:57 PM, David Griffith wrote:
>
>> HI all,
>>
>> I have en EOPrototype set up in my EOModel like this:
>>
>> Name: boolean
>> Value Class: java.lang.Boolean
>> Factory Method: valueOf
>> Conversion Method: toString
>> Init Arguament: NSString
>>
>> And I have just added 'c' as the value type.
>>
>> The value stored in the database as a result is 'true' or 'false' and
>> it is
>> getting stored ok.
>>
>> However, anytime I reference the value in code, like:
>>
>> orderStatus.oscIsShipped()
>>
>> I ALWAYS get false. No matter what. Even though it is true in the
>> database.
>>
>> It's got to be something small, can someone tell me why? It's driving
>> me
>> crazy.
>>
>> Regards,
>> Dave.
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| References: | |
| | >Re: Booleans (From: Kieran Kelleher <email@hidden>) |