Chapter 4 links - serializer method field

[Lcstyle]

Consider this an RFI,

I'm having trouble with adding links to the DRF serializers, seemingly, the "detail-view" doesn't exist anywhere, and I get a NoReverseMatch error

Reverse for 'sprint-detail' not found. 'sprint-detail' is not a valid view function or pattern name.

I am using latest django and python 3.6.

examples/scrum/board/serializers.py

Line 66 in ab0f6e8

if obj.sprint_id:

if obj.sprint_id:
links['sprint'] = reverse('sprint-detail',
kwargs={'pk': obj.sprint_id}, request=request)
if obj.assigned: