Asad:
I believe what you want should work with SearchFilter. Something like this:
from rest_framework.filters import SearchFilter
class UnitViewSet(viewsets.ReadOnlyModelViewSet):
serializer_class = UnitSerializer
queryset = Unit.objects.all()
filter_backends = (SearchFilter, )
search_fields = ('pk', 'unit_name')
On Tue, Oct 30, 2018 at 2:05 PM Asad Habib <asadhha...@gmail.com> wrote:
> Alan, appreciate your input. Basically, I want to be able to retrieve
> units based on either a primary key or other attribute. Is this possible
> using filtering if URLs are being defined using routers?
>
> On Tue, Oct 30, 2018 at 8:23 AM Alan Crosswell <a...@columbia.edu> wrote:
>
>> This seems like you are reinventing SearchFilter. Maybe I’m
>> misunderstanding.
>> https://www.django-rest-framework.org/api-guide/filtering/
>>
>> On Mon, Oct 29, 2018 at 2:50 PM Foobar <asadhha...@gmail.com> wrote:
>>
>>> I have the following code which doesn't work:
>>>
>>> In models.py:
>>>
>>> class Unit(models.Model):
>>> unit_name = models.CharField(max_length=255)
>>>
>>> In views.py
>>>
>>> class MultipleFieldLookupMixin(object):"""
>>> Apply this mixin to any view or viewset to get multiple field filtering
>>> based on a `lookup_fields` attribute, instead of the default single field
>>> filtering.
>>> """def get_object(self):
>>> queryset = self.get_queryset() # Get the base queryset
>>> queryset = self.filter_queryset(queryset) # Apply any filter backends
>>> filter = {}
>>> for field in self.lookup_fields:
>>> if self.kwargs[field]: # Ignore empty fields.
>>> filter[field] = self.kwargs[field]
>>> obj = get_object_or_404(queryset, **filter) # Lookup the object
>>> self.check_object_permissions(self.request, obj)
>>> return obj
>>> class UnitViewSet(viewsets.ReadOnlyModelViewSet, MultipleFieldLookupMixin):
>>> serializer_class = UnitSerializer
>>> queryset = Unit.objects.all()
>>> lookup_fields = ('pk', 'unit_name')
>>>
>>> In router.py
>>>
>>> router.register(r'units', UnitViewSet)
>>>
>>> I am able to access units/pk but units/unit_name gives a 404 error. Do I
>>> have to write a custom URL to make this work? If so, then what is the point
>>> of using Routers with ViewSets?
>>>
>>>
>>> I even tried adding the following directly to urls.py but it didn't make
>>> a difference (perhaps because this needs to be defined in router.py?)
>>>
>>>
>>> url(r'^units/(?P<unit_name>[^/.]+)$', views.UnitViewSet, name='unit-detail')
>>>
>>>
>>> Any help would be appreciated. Thanks.
>>>
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>> --
>> Alan Crosswell
>> Associate VP & CTO
>>
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Associate VP & CTO
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