Question

I don’t understand the following code on page 87 of Practical Django Projects:

from django.views.generic.list_detail import object_list

def category_detail(request, slug):
    category = get_object_or_404(Category, slug=slug)
    return object_list(request, queryset=category.entry_set.all(),
                       extra_context={ 'category': category }))

Where does that entry_set come from ? Where has it been defined ? Thanks.

Answer 1

It was created by the Entry model.

If a model has a ForeignKey, instances of the foreign-key model will have access to a Manager that returns all instances of the first model. By default, this Manager is named FOO_set, where FOO is the source model name, lowercased.