[Product-Developers] Attaching plone.app.widgets to a custom Dexterity schema.

David Glick (Plone) david.glick at plone.org
Sat Mar 8 19:18:44 UTC 2014

On 2/26/14, 12:28 PM, ajung wrote:
> I have a custom Dexterity type with a RelationField
>   54     media = RelationChoice($
>   55         title=_(u"label_podcast_item_media"),$
>   56         description=_(u"help_podcast_item_media"),$
>   57
> source=ObjPathSourceBinder(object_provides=IMediaItem.__identifier__),$
>   58         required=False,$
>   59     )  $
> that should make use of the plone.app.widgets's widget of the related items
> field.
> I was reading through dx.py and dx_bbb.py but I don't get the point how to
> reuse
> the existing widget here. Any pointer?
This week I did some work on adding support for sources in 

Now, with master of plone.app.vocabularies and plone.app.widgets, you 
can import plone.app.vocabularies.catalog.CatalogSource and do this:

media = RelationChoice(

and it will query the source when searching in the widget.

With my changes it's also now possible to use a plain Choice field with 
this source instead of RelationChoice, if you want to store a UUID 
rather than creating a relation.


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