Re: [Wonder-disc] D2W and Inheritance

[David H. <pro...@ma...>]

On 2010-10-29, at 7:52 AM, David LeBer wrote:

> 
> On 2010-10-29, at 10:49 AM, Ramsey Gurley wrote:
> 
>> I'm not aware of any component that does that, although I think that  
>> would make a nice addition to an edit relationship page.  Obviously,  
>> you couldn't instantiate something like ERAttachment, so the page  
>> could check for sub entities and require an entity selection before  
>> enabling the create button.
> 
> Patches welcome ;-)

I've got this working for a specific EO and it's subclasses. It is a WOPopUpButton with choices of sub entity and a submit button that takes you to a 'create' page for that sub entity.

I'll see if I can make it generic (in which case I'll submit a patch). If I can't, I'll write up in the wiki how to do it.

d

> 
>> 
>> Ramsey
>> 
>> On Oct 28, 2010, at 1:58 PM, David Holt wrote:
>> 
>>> Many (many) moons ago, in response to this question:
>>> 
>>> 1. Imagine you have a class with a to-one relationship to the root  
>>> of a class hierarchy. When you create an instance of that class, you  
>>> would also like to  connect to a new instance of a class under the  
>>> root of the class hierarchy the source object is pointing to.  
>>> However, since the model has the relationship to the root it can't  
>>> know which subclass you want to instanciate. I would therefore like  
>>> to add several buttons such as "new Code" or "new Decimal" or "new  
>>> Text" assuming the sublasses are Decimal_somehting Code_something  
>>> and Text_something.
>>> 
>>> Max Muller wrote:
>>> 
>>> This is easy to handle.  We make heavy use of entity inheritance and  
>>> have run into this multiple times.  My suggestion would be to write  
>>> a custom component for use in a D2W page that would either a) give  
>>> the user the choice when it is displayed when editing the object or  
>>> b) take the user to another page where they would choose the type of  
>>> sub entity they would like to create and when that is chosen the  
>>> object would be created, have the relationships set and then taken  
>>> to a D2W page for editing that particular eo..
>>> 
>>> Does anyone know if Wonder has such components?
>>> 
>>> Thanks,
>>> David
>>> ------------------------------------------------------------------------------
>>> Nokia and AT&T present the 2010 Calling All Innovators-North America  
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>> 
>> 
>> ------------------------------------------------------------------------------
>> Nokia and AT&T present the 2010 Calling All Innovators-North America contest
>> Create new apps & games for the Nokia N8 for consumers in  U.S. and Canada
>> $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
>> Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store 
>> http://p.sf.net/sfu/nokia-dev2dev
>> _______________________________________________
>> Wonder-disc mailing list
>> Won...@li...
>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
> 
> ;david
> 
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> David LeBer
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