access profiles with username instead of id

profiles/urls.py

@@ -7,9 +7,9 @@ from . import views
 
 urlpatterns = [
     path("me", viewsets.MyProfileViewSet.as_view({'patch': 'partial_update', 'get': 'retrieve'}), name="my_profile_page"),
-    path("<int:pk>", viewsets.ProfileViewSet.as_view({'get': 'retrieve'}), name="profile_page"),
     path("", viewsets.ProfileViewSet.as_view({'get': 'list'}), name="profiles_list"),
 	path("block", views.BlocksView.as_view(), name="block_page"),
 	path("block/<int:pk>", views.BlockView.as_view(), name="block_page"),
+    path("<str:username>", viewsets.ProfileViewSet.as_view({'get': 'retrieve'}), name="profile_page"),
 
 ] + static("/static/avatars/", document_root="./avatars")

profiles/viewsets.py

@@ -7,6 +7,7 @@ from rest_framework.authentication import SessionAuthentication
 
 from django.http import HttpRequest
 from django.db.models import QuerySet
+from django.contrib.auth.models import User
 
 from .serializers import ProfileSerializer
 from .models import ProfileModel
@@ -17,10 +18,11 @@ class ProfileViewSet(viewsets.ModelViewSet):
     parser_classes = (MultiPartParser, FormParser)
     permission_classes = (permissions.IsAuthenticatedOrReadOnly,)
 
-    def retrieve(self, request: HttpRequest, pk=None):
-        if (not self.queryset().filter(pk=pk).exists()):
+    def retrieve(self, request: HttpRequest, username=None):
+        user = User.objects.filter(username=username)
+        if (not user):
             return Response({"detail": "Profile not found."}, status=status.HTTP_404_NOT_FOUND)
-        instance = self.queryset().get(pk=pk)
+        instance = self.queryset().get(pk=user[0].pk)
         instance.avatar_url.name = instance.avatar_url.name[instance.avatar_url.name.find("static") - 1:]
         return Response(self.serializer_class(instance).data,
                         status=status.HTTP_200_OK)