[Answer]-Get gallery thumb from inline photo

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You can use a custom Manager and QuerySet, like this:

class PhotoQuerySet(models.query.QuerySet):
    def frontpage_thumb(self):
        return self.filter(frontpage_thumb=True)

class PhotoManager(models.Manager):
    use_for_related_fields = True

    def get_queryset(self):
        return PhotoQuerySet(self.model)

class Photo(models.Model):
    # ...
    objects = PhotoManager()

Then you can do things like:

# get first thumb for a gallery:
>>> g = Gallery.objects.all()[0]
>>> thumb = g.photo_set.all().frontpage_thumb()[0]

# or all thumbs for all galleries:
>>> all_thumbs = Photo.objects.all().frontpage_thumb()

Because your schema doesn’t guarantee that you only have one Photo per Gallery with frontpage_thumb=True set, you still have to get the first element of the result in the template, using .0, like in the first Python example above:

{% for gallery in gallery_list %}
    <img src="{{ gallery.photo_set.all.frontpage_thumb.0.image.url }}">
{% endfor %}
👤sk1p

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