I agree with Jurgen. It would be really nice if I could go into the data
modeler and leave the DbAttribute blank or set it to something like
"User-defined" on an ObjAttribute. The next time I generate classes, the
modeler would create an empty stub method with a comment reminding me to
fill it in. The engine would know that this is a read-only transient
attribute and not try to persist or validate it. As it is now, I get an
error in the modeler if I try to generate classes with the DbAttribute
blank.
Bruce
----- Original Message -----
From: "Jürgen Saar" <Juerge..Saar.org>
To: <cayenne-use..bjectstyle.org>
Sent: Friday, February 17, 2006 1:42 AM
Subject: RE: Re: Computed Attributes
> Yes ist does cover most unusually need,
> but there a 2 additional aspects:
>
> -- 1 --
> For generation tasks, like velocity, it would be helpful
> if they can be controlled by repository
>
> -- 2 --
> In the team it brings more transparency for
> the Datastructure
>
>
> And I think it should be easy to ignore the
> transient attributes on all db activities
> within the cayenne engine.
>
>
>
> 2006/2/16, Joshua Pyle <joshua.t.pyl..mail.com>
>>
>> Maybe I'm over simplifying but if I need an attribute on a cayenne
>> object I just create the appropriate getter and perform whatever calcs
>> needed in that getter. In the example I provide I'm just formatting a
>> date but I could also run another query loop through the results and
>> spit out a sum. I could even execute a SQLTemplate query.
>>
>> public class User extends _User{
>> public String getEntryDateString{
>> Date toFormat = this.getEntryDate();
>> if( toFormat == null ){
>> return "";
>> }else{
>> return Util.SIMPLE_DATE.format( toFormat );
>> }
>> }
>>
>> public Double getComplexThingy{
>> Double toReturn = new Double(0.0);
>> // TODO loop through a List of object and perform a complex
>> calculation
>> return toReturn;
>> }
>> }
>>
>> I have yet to find a situation where this does not cover even my most
>> unusually needs.
>>
>> Joshua T. Pyle
>>
>
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