Django RestFramework call the Api by the Field - python-3.x

Question

currently i pass the parameter 'id' in the url and i call the API by id however i would like to call API by the parameter.here is views.py`
class post_list(APIView):
def get(self,request,format=None):
post_resource=PostResource()
dataset=Dataset()
post = Post.objects.all()
serializer = PostSerializer(post, many=True)
a=[]
for row in post:
a.append(row)
return Response(serializer.data)
def post(self,request,format =None):
serializer = PostSerializer(data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data, status=201)
return Response(serializer.errors, status=400)
class post_detail(APIView):
def get_object(self, pk):
try:
return Post.objects.get(pk=pk)
except Post.DoesNotExist:
raise Http404
def get(self, request, pk, format=None):
post = self.get_object(pk)
serializer = PostSerializer(post)
return Response(serializer.data)
def put(self, request, pk, format=None):
snippet = self.get_object(pk)
serializer = PostSerializer(snippet, data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def delete(self, request, pk, format=None):
post = self.get_object(pk)
post.delete()
return Response(status=status.HTTP_204_NO_CONTENT)
this is the result when i pass the id in the url`
when i pass the id in the url it's show only the that particular id result however i need view if i pass the other field instead of the id it's show the result based on that.so my question is what should i have to change in the views.py and Urls.py. this is urls.py file`
from django.conf.urls import url
from api import views
from rest_framework.urlpatterns import format_suffix_patterns
urlpatterns = [
url(r'^post/$', views.post_list.as_view()),
url(r'^post/(?P<pk>[0-9]+)/$', views.post_detail.as_view()),
]
urlpatterns=format_suffix_patterns(urlpatterns)
This is my serializer.py file`
from rest_framework import serializers
from .models import Post
class PostSerializer(serializers.ModelSerializer):
class Meta:
model = Post
#fields=('ProductName','Score')
fields ='__all__'
`

Answer 1

You should change your url so that it accepts string:
url(r'^post/(?P<pname>[a-zA-Z0-9]+)/$', views.post_detail.as_view())
and then change your get_object method like this:
def get_object(self, pname):
try:
return Post.objects.get(pname=pname)
except Post.DoesNotExist:
raise Http404
But you will issues if pname is not unique, because it will complain that you have more than one such Post.
Hope it helps!