Hello all,
I'm new to DRF and am attempting to use it to add API features to an
existing application. I'm getting the following error with a model that
has a 1:n relationship with itself:
Could not resolve URL for hyperlinked relationship using view name
"dockerimage-detail". You may have failed to include the related model in
your API, or incorrectly configured the `lookup_field` attribute on this
field.
Here is my setup:
Model:
class DockerImage(models.Model):
class Meta:
verbose_name = 'Docker Image'
verbose_name_plural = 'Docker Images'
ordering = ('di_name',)
# 1:n with self
parent_image = models.ForeignKey(
'self',
on_delete=models.PROTECT,
verbose_name='Parent Image',
blank=True,
null=True,
)
di_name = models.CharField(
'Image Name',
max_length=32,
unique=True,
validators=[validate_lower],
)
# The last time the image was built
di_last_built = models.DateTimeField(
'Last Built',
blank=True,
null=True,
)
def __str__(self):
return self.di_name
Serializer:
class DockerImageSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = DockerImage
fields = ['parent_image', 'di_name', 'di_last_built']
View:
class DockerImageViewSet(viewsets.ModelViewSet):
queryset = DockerImage.objects.all()
serializer_class = DockerImageSerializer
URLs:
router = routers.DefaultRouter()
router.register(r'dockerimage', views.DockerImageViewSet)
urlpatterns = [
url(r'^api/', include(router.urls)),
]
If I remove "parent_image" (the self-1:n) from the field list all works as
expected.
I've also tried using this as my serializer with no difference:
class DockerImageSerializer(serializers.ModelSerializer):
parent_image = serializers.HyperlinkedRelatedField(
read_only=True,
view_name='dockerimage-detail',
)
class Meta:
model = DockerImage
fields = ['parent_image', 'di_name', 'di_last_built']
Could someone shed some light as to where I'm going wrong and/or a
reasonable workaround?
Thanks in advance,
j
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