Re: m2m through problem: object has no attribute 'ce_set'

[Daniel Roseman]

On Friday, 13 July 2012 13:26:53 UTC-7, bn wrote:

I'm trying to get a template to iterate through and print intermediate model data.  Can you look at this and point out what is wrong?  I've tried to follow the django docs closely:

def category_detail(request, pk):
    category    = models.Category.objects.select_related().get(pk=pk)
    entries     = category.entry.order_by('-temp_sort_order').filter(temp_sort_order__gte=0)
    for entry in entries:
        assert isinstance(entry, models.Entry)

        ce = models.CategoryEntry2.objects.get(entry=entry, category=category)
        pprint('1: ' + ce.wiki + str(entry.ce))    # works perfectly

        #foo = entry.ce_set.get(category=category) #'Entry' object has no attribute 'ce_set'
        #pprint('2: ' + foo.wiki + str(foo.ce))  #'Entry' object has no attribute 'ce_set'
    for entry in category.ce_set.all:           #'Category' object has no attribute 'ce_set'
        assert isinstance(entry, models.Entry)
        pprint('1: ' + entry.wiki)

    return render_to_response('category.html'...)

The Category model has a related_name of 'ce'.:

class Category(models.Model):
    title           = models.CharField(max_length=1024,null=True,blank=True)
    entry           = models.ManyToManyField(Entry,null=True,blank=True,
                                             related_name='ce',
                                             through='CategoryEntry2',
                                             )

You've set related_name to 'ce', so you should use 'ce'. You've done that in the line with the 'works perfectly' comment, so I'm not sure why you would think it should be different in the following lines.

--

DR.