Perhaps this is completely unrelated but I've noticed another pitfall.
class Dad(grok.View):
# see dad.pt
def get_calculation(): ...
class Son(Dad):
def render(self): # will never be called
return "manual render() " + self.get_calculation()
When you publish the view 'son' it be spotted as one having a template
already, thus omitting it's explicit render method.
I made this mistake myself and got confused. In the end I introduced a
baseclass view and put get_calculation() in that instead.
Peter
2008/8/5 Jan-Wijbrand Kolman <
janwijbrand@...>:
> Hi,
>
> Somewhere in June Ivo wrote:
>
>> I'm confused by how grok.template() works with inheritance. What I
>> want is a baseclass that implements a generic way to list objects in a
>> container with an associated template. Specific context
>> implementations should derive from this and reuse the template that's
>> bound to the base listing.
>>
>> This works with render(), but it doesn't work with a template that's
>> bound through grok.template() on the baseclass - grok will complain
>> there's no associated template or render method.
>>
>> I know grok.AddForm does something similar - what's the trick?
>
> Strange thing is, I remember reading this post at that time, but I somehow
> didn't appreciate the issue raised to its full extent.
>
> I do now.
>
> I think this really is a problem, as the behaviour for the `grok.template()`
> directive is counter intuitive *and* different from the behaviour of other
> directives such as `grok.context()` when subclassing view components.
>
> My proposal would be that `grok.template()` inheritance behaviour is fixed.
> I'll create a bug report in launchpad. I also volunteer to fix the problem -
> if we indeed agree this is an issue.
>
> So, is this indeed a bug in your opinion?
>
>
> regards,
> jw
>
>
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--
Peter Bengtsson,
work www.fry-it.com
home www.peterbe.com
hobby www.issuetrackerproduct.com
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