solution

cinema/migrations/0001_initial.py

@@ -107,7 +107,8 @@ class Migration(migrations.Migration):
                 (
                     "movie",
                     models.ForeignKey(
-                        on_delete=django.db.models.deletion.CASCADE, to="cinema.movie"
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="cinema.movie",
                     ),
                 ),
             ],

cinema/models.py

@@ -94,7 +94,8 @@ def validate_ticket(row, seat, cinema_hall, error_to_raise):
             if not (1 <= ticket_attr_value <= count_attrs):
                 raise error_to_raise(
                     {
-                        ticket_attr_name: f"{ticket_attr_name} number must be in available range: "
+                        ticket_attr_name: f"{ticket_attr_name} number "
+                        f"must be in available range: "
                         f"(1, {cinema_hall_attr_name}): "
                         f"(1, {count_attrs})"
                     }
@@ -122,7 +123,8 @@ def save(
 
     def __str__(self):
         return (
-            f"{str(self.movie_session)} (row: {self.row}, seat: {self.seat})"
+            f"{str(self.movie_session)} "
+            f"(row: {self.row}, seat: {self.seat})"
         )
 
     class Meta:

cinema/permissions.py

@@ -0,0 +1,15 @@
+from rest_framework.permissions import BasePermission, SAFE_METHODS
+
+
+class IsAdminOrIfAuthenticatedReadOnly(BasePermission):
+    """
+    The request is authenticated as an admin - read/write,
+     if as user - a read-only.
+    """
+
+    def has_permission(self, request, view):
+        return bool(
+            request.method in SAFE_METHODS
+            and request.user
+            and request.user.is_authenticated
+        ) or (request.user and request.user.is_staff)

cinema/views.py

@@ -1,11 +1,21 @@
 from datetime import datetime
 
 from django.db.models import F, Count
-from rest_framework import viewsets
+from rest_framework import viewsets, mixins
+from rest_framework.authentication import TokenAuthentication
 from rest_framework.pagination import PageNumberPagination
-
-from cinema.models import Genre, Actor, CinemaHall, Movie, MovieSession, Order
-
+from rest_framework.permissions import IsAuthenticated
+from rest_framework.viewsets import GenericViewSet
+
+from cinema.models import (
+    Genre,
+    Actor,
+    CinemaHall,
+    Movie,
+    MovieSession,
+    Order,
+)
+from cinema.permissions import IsAdminOrIfAuthenticatedReadOnly
 from cinema.serializers import (
     GenreSerializer,
     ActorSerializer,
@@ -21,24 +31,50 @@
 )
 
 
-class GenreViewSet(viewsets.ModelViewSet):
+class GenreViewSet(
+    mixins.CreateModelMixin,
+    mixins.ListModelMixin,
+    GenericViewSet
+):
     queryset = Genre.objects.all()
     serializer_class = GenreSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
 
-class ActorViewSet(viewsets.ModelViewSet):
+class ActorViewSet(
+    mixins.CreateModelMixin,
+    mixins.ListModelMixin,
+    GenericViewSet
+):
     queryset = Actor.objects.all()
     serializer_class = ActorSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
 
-class CinemaHallViewSet(viewsets.ModelViewSet):
+class CinemaHallViewSet(
+    mixins.CreateModelMixin,
+    mixins.ListModelMixin,
+    GenericViewSet
+):
     queryset = CinemaHall.objects.all()
     serializer_class = CinemaHallSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
 
-class MovieViewSet(viewsets.ModelViewSet):
-    queryset = Movie.objects.all().prefetch_related("genres", "actors")
+class MovieViewSet(
+    mixins.CreateModelMixin,
+    mixins.ListModelMixin,
+    mixins.RetrieveModelMixin,
+    GenericViewSet
+):
+    queryset = Movie.objects.prefetch_related("genres", "actors")
+
     serializer_class = MovieSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
     @staticmethod
     def _params_to_ints(qs):
@@ -63,7 +99,6 @@ def get_queryset(self):
         if actors:
             actors_ids = self._params_to_ints(actors)
             queryset = queryset.filter(actors__id__in=actors_ids)
-
         return queryset.distinct()
 
     def get_serializer_class(self):
@@ -81,12 +116,15 @@ class MovieSessionViewSet(viewsets.ModelViewSet):
         MovieSession.objects.all()
         .select_related("movie", "cinema_hall")
         .annotate(
-            tickets_available=F("cinema_hall__rows")
-            * F("cinema_hall__seats_in_row")
-            - Count("tickets")
+            tickets_available=(F("cinema_hall__rows")
+                               * F("cinema_hall__seats_in_row")
+                               - Count("tickets")
+                               )
         )
     )
     serializer_class = MovieSessionSerializer
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAdminOrIfAuthenticatedReadOnly,)
 
     def get_queryset(self):
         date = self.request.query_params.get("date")
@@ -118,20 +156,28 @@ class OrderPagination(PageNumberPagination):
     max_page_size = 100
 
 
-class OrderViewSet(viewsets.ModelViewSet):
-    queryset = Order.objects.all().prefetch_related(
+class OrderViewSet(
+    mixins.CreateModelMixin,
+    mixins.ListModelMixin,
+    GenericViewSet
+):
+    queryset = Order.objects.prefetch_related(
         "tickets__movie_session__movie", "tickets__movie_session__cinema_hall"
     )
     serializer_class = OrderSerializer
     pagination_class = OrderPagination
+    authentication_classes = (TokenAuthentication,)
+    permission_classes = (IsAuthenticated,)
+    lookup_field = "id"
 
     def get_queryset(self):
         return Order.objects.filter(user=self.request.user)
 
     def get_serializer_class(self):
         if self.action == "list":
             return OrderListSerializer
-
+        elif self.action == "retrieve":
+            return OrderSerializer
         return OrderSerializer
 
     def perform_create(self, serializer):

cinema_service/settings.py

@@ -125,7 +125,7 @@
 
 USE_I18N = True
 
-USE_TZ = False
+USE_TZ = True
 
 
 # Static files (CSS, JavaScript, Images)

cinema_service/urls.py

@@ -4,5 +4,6 @@
 urlpatterns = [
     path("admin/", admin.site.urls),
     path("api/cinema/", include("cinema.urls", namespace="cinema")),
+    path("api/user/", include("user.urls", namespace="user")),
     path("__debug__/", include("debug_toolbar.urls")),
 ]

user/serializers.py

@@ -1 +1,38 @@
-# write your code here
+from django.contrib.auth import get_user_model
+from rest_framework import serializers
+
+
+class UserSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = get_user_model()
+        fields = (
+            "id",
+            "username",
+            "email",
+            "password",
+            "is_staff"
+        )
+        read_only_fields = ("id", "is_staff")
+        extra_kwargs = {
+            "password": {
+                "write_only": True,
+                "min_length": 5
+            }
+        }
+
+    def create(self, validated_data):
+        """
+        create user with encrypted password
+        """
+        return get_user_model().objects.create_user(**validated_data)
+
+    def update(self, instance, validated_data):
+        """
+        Update User with encrypted password
+        """
+        password = validated_data.pop("password", None)
+        user = super().update(instance, validated_data)
+        if password:
+            user.set_password(password)
+            user.save()
+        return user

user/urls.py

@@ -1 +1,12 @@
-# write your code here
+from django.urls import path
+
+from user.views import CreateUserView, LoginUserView, ManageUserView
+
+app_name = "user"
+
+urlpatterns = [
+    path("register/", CreateUserView.as_view(), name="create"),
+    path("login/", LoginUserView.as_view(), name="login"),
+    path("me/", ManageUserView.as_view(), name="manage")
+
+]

user/views.py

@@ -1 +1,29 @@
-# write your code here
+from rest_framework import generics
+from rest_framework.authentication import TokenAuthentication
+from rest_framework.authtoken.views import ObtainAuthToken
+from rest_framework.permissions import IsAuthenticated
+from rest_framework.settings import api_settings
+
+from user.serializers import UserSerializer
+
+
+class CreateUserView(generics.CreateAPIView):
+    serializer_class = UserSerializer
+
+
+class LoginUserView(ObtainAuthToken):
+    renderer_classes = api_settings.DEFAULT_RENDERER_CLASSES
+
+
+class ManageUserView(generics.RetrieveUpdateAPIView):
+    serializer_class = UserSerializer
+    authentication_classes = (
+        TokenAuthentication,
+    )
+    permission_classes = (IsAuthenticated,)
+
+    def get_object(self):
+        """
+        Retrieve and return the authenticated user.
+        """
+        return self.request.user