[Product-Developers] Re: bug with portetRenderer?

[Dylan Jay]

On 18/01/2010, at 5:44 PM, Vitaliy Podoba wrote:

> Hi Dylan,
>
> Actually that's a side effect of zope component registry because as  
> you said
> carousel portlet inherits from collection portlet thus also provides
> ICollectionPortlet interface.

Actually I said the implementation inheritted from CollectionPortlet  
not the interface but looking at the code again you are right.
I removed the Interface inheritance since Carousel isn't really a  
collection portlet it's just reusing some code.

class ICarouselPortlet(Interface):
     """A portlet displaying a carousel with a Collection's results
     """
however this doesn't stop the porletRenderer override :(

Is it that portlets don't work like views or that the portlet views  
are registered by the class instead of the interface?


>
> Of course this behavior is usually not desirable while working with  
> plone 3
> portlets. I think there are at least two workarounds for this issue:
>
> 1. Artificially add marker interface to collection portlet  
> Assignement via
> five:implements directive and then register portletRenderer for this
> interface instead of ICollectionPortlet. Though I'm not sure it'll  
> work as I
> don't know if directly provided interfaces are inherited...
>
> 2. Add one more portletRenderer for carousel portlet which will  
> remain the
> same renderer for this portlet as it'll be registered for more  
> specific
> portlet interface ICarouselPortlet.

thanks. I think both would work but I still think something is going  
wrong since ICarouselPortlet no longer inherits from ICollectionPortlet.


>
>
> Good luck,
> Vitaliy Podoba
>
> Dylan Jay wrote:
>
>> Hi,
>>
>> In collective.carousel is the following definition
>>
>>     <plone:portlet
>>         name="portlet.Carousel"
>>         interface=".carousel.ICarouselPortlet"
>>         assignment=".carousel.Assignment"
>>         view_permission="zope2.View"
>>          
>> edit_permission="plone.portlet.collection.AddCollectionPortlet"
>>         renderer=".carousel.Renderer"
>>         addview=".carousel.AddForm"
>>         editview=".carousel.EditForm"
>>         />
>>
>> carousel.Renderer etc all inherit from
>> plone.portlet.collection.collection and the Renderer uses its own
>> template
>>
>> class Renderer(base.Renderer):
>>     render = ViewPageTemplateFile('carousel.pt')
>>
>>
>> This seems all fine and works well until I install a theme with the
>> following zcml
>>
>>     <plone:portletRenderer
>>     portlet="plone.portlet.collection.collection.ICollectionPortlet"
>>     layer=".interfaces.IThemeSpecific"
>>     template="templates/collection.pt"
>>     />
>>
>> This changes the renderer for ICarouselPortlet as well as
>> ICollectionPortlet and all my carousel portlets appear as collection
>> portlets even though they add and edit forms still remain as carousel
>> forms.
>>
>> Is that expected?
>>
>>
>> ---
>> Dylan Jay, Plone Solutions Manager
>> www.pretaweb.com
>> tel:+61299552830
>> mob:+61421477460
>> skype:dylan_jay
>
>
>
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