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From Dan Haywood <dkhayw...@gmail.com>
Subject Re: Why are NonPersistent field not editable?
Date Mon, 11 Oct 2010 11:38:18 GMT

On 11/10/2010 12:30, Robert Matthews wrote:
> Dan
>
> What was your rational behind making non-persistent fields non-editable?
I guess cos I've only used them in the sense of showing derived 
information.  If it were editable, then modifying the value would need 
to have a side-effect of updating some other property on this object or 
an associated one.  That strikes me as something that ought to be 
represented as an action.


>
> For example, I have a Task object that is created to change a Plan's 
> details.  It is coded so that the get and modify method in the Task 
> delegate to the Plan (there is no need to persist this information 
> twice). 

Could you post the code, so we can debate it?  (Since it's something 
that also would occur in NO MVC, it might also be helpful to to get 
Richard's view).




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