What is the canonical way to get lead image

hvelarde · October 3, 2016, 9:02pm

IMO, this is another example of something that was not very well though when designed; let me explain: what if I want to directly provide an image field in my content type without having to depend on the behavior?

and this is not a rare case: we have 2 different content types (News Article and Photo Gallery) that are containers and we implement the lead image as the first image in the container:

github.com

collective/collective.nitf/blob/master/src/collective/nitf/content.py#L32-L42


      
          def image(self):
              """Return the first image."""
              images = self.get_images()
              return images[0] if len(images) > 0 else None
          
          def media_caption(self):
              """Return the description of the first image."""
              try:
                  return self.image().Description()
              except AttributeError:
                  return u""

as previously experienced with the ICollection marker interface, we have an issue here.