Filtering on foreign keys

Question

I generate QuerySet as follows:

def get_queryset(self):
    return Article.objects.filter(foreignkey=self.kwargs['value'])

The value is generated like this:

<a href="{% url 'someview' value %}">anchor</a>
url(r'^(?P<value>\w+)/$', someview.as_view(), name='someview')

When value is integer then everything works, but when I pass value as a string I receive:

ValueError: "invalid literal for int() with base 10"

Answer 1

You are passing string to the foreign key's primary key which is integer by default. If you want to filter based on foreign key field use

def get_queryset(self):
    return Article.objects.filter(foreignkey__valuefield=self.kwargs['value'])