added some type hints to functions and methods :)

backend/account/models.py

@@ -9,7 +9,7 @@
 
 
 @receiver(post_save, sender=User)
-def create_or_update_vendor(sender, instance, created, **kwargs):
+def create_or_update_vendor(sender, instance, created, **kwargs) -> None:
     print("RECEIVER")
     print("SENDER", sender.username)
     print("INSTANCE", instance)

backend/account/schema.py

@@ -17,7 +17,7 @@ class Query(graphene.ObjectType):
     user_details = graphene.Field(UserType)
     # user_details = graphene.List(UserType)
 
-    def resolve_user_details(root, info, **kwargs):
+    def resolve_user_details(root, info, **kwargs) -> User:
         """
         The resolve_user_details function is a resolver function that returns the user details of the currently logged in user.
         It takes three arguments: root, info, and **kwargs. The root argument is required by all resolve functions and contains data about the query itself;

backend/account/serializers.py

@@ -24,7 +24,7 @@ class Meta:
         fields = ["id", "username", "email", "password"]
         extra_kwargs = {"password": {"write_only": True}}
 
-    def create(self, validated_data):
+    def create(self, validated_data: dict) -> User:
         print("SERIALIZER")
         user = User.objects.create_user(
             validated_data["username"],
@@ -42,13 +42,13 @@ class Meta:
         model = User
         fields = ("old_password", "password")
 
-    def validate_old_password(self, value):
+    def validate_old_password(self, value: str) -> str:
         user = self.context["request"].user
         if not user.check_password(value):
             raise serializers.ValidationError({"old_password": "Old password is not correct"})
         return value
 
-    def update(self, instance, validated_data):
+    def update(self, instance, validated_data: dict) -> User:
         user = self.context["request"].user
 
         if user.id != instance.id:
@@ -71,19 +71,19 @@ class Meta:
             "last_name": {"required": True},
         }
 
-    def validate_email(self, value):
+    def validate_email(self, value: str) -> str:
         user = self.context["request"].user
         if User.objects.exclude(id=user.id).filter(email=value).exists():
             raise serializers.ValidationError({"email": "This email is already in use."})
         return value
 
-    def validate_username(self, value):
+    def validate_username(self, value: str) -> str:
         user = self.context["request"].user
         if User.objects.exclude(id=user.id).filter(username=value).exists():
             raise serializers.ValidationError({"username": "This username is already in use."})
         return value
 
-    def update(self, instance, validated_data):
+    def update(self, instance, validated_data: dict) -> User:
         user = self.context["request"].user
 
         if user.id != instance.id:
@@ -105,7 +105,7 @@ class AccountLoginSerializer(serializers.Serializer):
     username = serializers.CharField()
     password = serializers.CharField()
 
-    def validate(self, data):
+    def validate(self, data: dict) -> dict:
         user = authenticate(**data)
         if user and user.is_active:
             return user

backend/account/views.py

@@ -48,7 +48,7 @@ class AccountRegisterDetailView(generics.GenericAPIView):
     permission_classes = (AllowAny,)
 
     @swagger_auto_schema(responses={200: user_response})
-    def post(self, request, *args, **kwargs):
+    def post(self, request, *args, **kwargs) -> Response:
 
         serializer = self.get_serializer(data=request.data)
         serializer.is_valid(raise_exception=True)
@@ -75,7 +75,7 @@ class AccountLoginDetailView(generics.GenericAPIView):
     permission_classes = (AllowAny,)
 
     @swagger_auto_schema(responses={200: user_response})
-    def post(self, request, *args, **kwargs):
+    def post(self, request, *args, **kwargs) -> Response:
         serializer = self.get_serializer(data=request.data)
         serializer.is_valid(raise_exception=True)
         user = serializer.validated_data
@@ -122,7 +122,7 @@ class AccountLogoutView(views.APIView):
 
     permission_classes = (IsAuthenticated,)
 
-    def post(self, request):
+    def post(self, request) -> Response:
 
         try:
 
@@ -158,7 +158,7 @@ class AccountLogoutAllView(views.APIView):
 
     permission_classes = (IsAuthenticated,)
 
-    def post(self, request):
+    def post(self, request) -> Response:
         try:
             tokens = OutstandingToken.objects.filter(user_id=request.user.id)
             for token in tokens:

backend/manage.py

@@ -4,7 +4,7 @@
 import sys
 
 
-def main():
+def main() -> None:
     """Run administrative tasks."""
     os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'core.settings')
     try:

backend/order/cart.py

@@ -3,7 +3,7 @@
 from store.models import Product
 
 class Cart(object):
-    def __init__(self, request):
+    def __init__(self, request: object) -> None:
         self.session = request.session
         cart = self.session.get(settings.CART_SESSION_ID)
 
@@ -12,7 +12,7 @@ def __init__(self, request):
 
         self.cart = cart
 
-    def __iter__(self):
+    def __iter__(self) -> None:
         for p in self.cart.keys():
             self.cart[str(p)]['product'] = Product.objects.get(pk=p)
 
@@ -21,10 +21,10 @@ def __iter__(self):
 
             yield item
 
-    def __len__(self):
+    def __len__(self) -> int:
         return sum(item['quantity'] for item in self.cart.values())
 
-    def add(self, product_id, quantity=1, update_quantity=False):
+    def add(self, product_id, quantity=1, update_quantity=False) -> None:
         product_id = str(product_id)
 
         if product_id not in self.cart:
@@ -38,20 +38,20 @@ def add(self, product_id, quantity=1, update_quantity=False):
 
         self.save()
 
-    def remove(self, product_id):
+    def remove(self, product_id) -> None:
         if product_id in self.cart:
             del self.cart[product_id]
             self.save()
 
-    def save(self):
+    def save(self) -> None:
         self.session[settings.CART_SESSION_ID] = self.cart
         self.session.modified = True
 
-    def clear(self):
+    def clear(self) -> None:
         del self.session[settings.CART_SESSION_ID]
         self.session.modified = True
 
-    def get_total_cost(self):
+    def get_total_cost(self) -> float:
         for p in self.cart.keys():
             self.cart[str(p)]['product'] = Product.objects.get(pk=p)
 

backend/order/models.py

@@ -46,7 +46,7 @@ class Meta:
         verbose_name = _("Order")
         verbose_name_plural = _("Orders")
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
         """
         If the Order instance is an immediate purchase and not an offer,
         set the amount to be the price of the product.
@@ -62,13 +62,13 @@ def save(self, *args, **kwargs):
 
         super(Order, self).save(*args, **kwargs)
 
-    def get_price(self):
+    def get_price(self) -> float:
         return self.product.price
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("order:order_list", args=[self.id])
 
-    def __str__(self):
+    def __str__(self) -> str:
         return f"Product {self.product.title} ordered by {self.buyer.name}"
 
 
@@ -95,15 +95,15 @@ class Meta:
         verbose_name = _("Order Detail")
         verbose_name_plural = _("Order Details")
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("orderdetails:orderdetails_list", args=[self.id])
 
-    def __str__(self):
+    def __str__(self) -> str:
         return f"Order Details of {self.full_name} on order {self.order.id}"
 
 
 @receiver(pre_delete, sender=Order)
-def reset_product_is_available(sender, instance, **kwargs):
+def reset_product_is_available(sender, instance, **kwargs) -> None:
     """
     Reset an product's availability if an order for that product is deleted.
 

backend/order/serializers.py

@@ -82,7 +82,7 @@ class Meta:
         }
         extra_kwargs = {"amount": {"required": False}, "order_detail": {"required": False}}
 
-    def validate(self, data):
+    def validate(self, data: dict) -> dict:
         """
         Check if product is avaialable or if it is already in the buyer's orders.
         Ensure an offer is never more than the price of the product.
@@ -112,7 +112,7 @@ def validate(self, data):
 
         return data
 
-    def create(self, validated_data):
+    def create(self, validated_data: dict) -> Order:
         request = self.context["request"]
         buyer = request.user.vendor
         # buyer = Vendor.objects.get(created_by=request.user.vendor)
@@ -138,7 +138,7 @@ def create(self, validated_data):
 
         return instance
 
-    def update(self, instance, validated_data):
+    def update(self, instance, validated_data: dict) -> Order:
 
         user = self.context["request"].user.vendor
 

backend/order/views.py

@@ -100,7 +100,7 @@ class OrderItemCheckout(generics.CreateAPIView):
     Checkout POST.
     """
 
-    def post(self, request, *args, **kwargs):
+    def post(self, request, *args, **kwargs) -> Response:
         body = request.POST.get("body")
         order_item = OrderModel.objects.create(
             product=body["product"],

backend/store/models.py

@@ -22,11 +22,11 @@
 )
 
 
-def upload_path(instance, filename):
+def upload_path(instance, filename: str) -> str:
     return "/".join(["images", str(instance.name), filename])
 
 
-def rand_slug():
+def rand_slug() -> str:
     return "".join(random.choice(string.ascii_letters + string.digits) for _ in range(6))
 
 
@@ -54,15 +54,15 @@ class Meta:
         verbose_name = _("Category")
         verbose_name_plural = _("Categories")
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("store:category_list", args=[self.slug])
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
         if not self.slug:
             self.slug = slugify(rand_slug() + "-" + self.name)
         super(Category, self).save(*args, **kwargs)
 
-    def get_slug_list(self):
+    def get_slug_list(self) -> list:
         try:
             ancestors = self.get_ancestors(include_self=True)
         except:
@@ -129,20 +129,20 @@ class Meta:
         verbose_name = _("Product")
         verbose_name_plural = _("Products")
 
-    def get_absolute_url(self):
+    def get_absolute_url(self) -> str:
         return reverse("store:product-detail", args=[self.slug])
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
 
         if not self.slug:
             self.slug = slugify(self.title)
 
         super(Product, self).save(*args, **kwargs)
 
-    def __str__(self):
+    def __str__(self) -> str:
         return self.title
 
-    def __unicode__(self):
+    def __unicode__(self) -> str:
         return self.title
 
 
@@ -185,23 +185,23 @@ class Meta:
         verbose_name_plural = _("Versatile Images")
         UniqueConstraint(fields=["is_feature"], condition=Q(is_feature=True), name="is_feature_is_unique")
 
-    def get_thumbnail(self):
+    def get_thumbnail(self) -> str:
         if self.image:
             thumbnail = self.make_thumbnail(self.image)
             return thumbnail
         else:
             return "https://via.placeholder.com/240x180.jpg"
 
-    def make_thumbnail(self, image, size=("240x180")):
+    def make_thumbnail(self, image, size=("240x180")) -> str:
         return image.thumbnail[size].url
 
-    def __str__(self):
+    def __str__(self) -> str:
         return self.name
 
-    def __unicode__(self):
+    def __unicode__(self) -> str:
         return self.name
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
         if not self.name:
             if self.is_feature:
                 self.name = self.product.title + "-" + "feature" + "-" + rand_slug()
@@ -215,7 +215,7 @@ def save(self, *args, **kwargs):
 
 
 @receiver(post_save, sender=Image)
-def warm_image_instances_post_save(sender, instance, **kwargs):
+def warm_image_instances_post_save(sender, instance, **kwargs) -> None:
     """Ensures Image objects are created post-save"""
     all_img_warmer = VersatileImageFieldWarmer(
         instance_or_queryset=instance, rendition_key_set="default_product", image_attr="image", verbose=True
@@ -233,12 +233,12 @@ class Meta:
         verbose_name = _("Favorite Product")
         verbose_name_plural = _("Favorite Products")
 
-    def __str__(self):
+    def __str__(self) -> str:
         return "%s's favorites" % self.vendor.name
 
 
 @receiver(pre_delete, sender=Product)
-def delete_category_if_null(sender, instance, **kwargs):
+def delete_category_if_null(sender, instance, **kwargs) -> None:
     """
     Delete category objects if it has no other related products.