I'd like to see you model structure, but based on what I think it is:
class Entry(model.Model):
categories=models.ManyToManyField(Category)
class Content(models.Model):
entry=models.ForeignKey(Entry)
You have a Content Instance
You want to see other entries belonging to one or more of the
categories for that Content instances Entry instance
You could do a custom template tag like yours:
{% get_related_entries content_instance.entry as related_entries %}
That tag would do something like the following :
#fetching primary key only since we don't need the whole thing
category_ids=content_instance.entry.categories.values("pk")
context['related_entries']=Entry.objects.filter(pk__in=category_ids)
That would work, but my choice would probably be to add a method to
your Entry class.
class Entry(models.Model):
categories=models.ManyToManyField(Category)
def related_entries(self,**filters):
return
Entry.objects.filter(pk__in=self.categories.filter(**filters).values("pk"))
That way you don't need a tag at all. Just do:
{% for related_entry in content.entry.related_entries %}
...
{% endfor %}
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