Re: Booleans
Re: Booleans
- Subject: Re: Booleans
- From: Kieran Kelleher <email@hidden>
- Date: Wed, 10 Mar 2004 22:56:02 -0500
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: | |
| | >Booleans (From: David Griffith <email@hidden>) |