Clean up TransactionSerializer

src/vinywaji/api/serializers.py

@@ -19,4 +19,12 @@ class Meta:
     user = serializers.PrimaryKeyRelatedField(
         default=serializers.CurrentUserDefault(), queryset=models.User.objects.all()
     )
-    amount = serializers.DecimalField(max_digits=5, decimal_places=2)
+    amount = serializers.FloatField()
+
+    def create(self, validated_data):
+        if self.context["request"].query_params.get("currency") == "euro":
+            validated_data["amount"] = validated_data["amount"] * 100
+        if self.context["request"].query_params.get("type") == "purchase":
+            validated_data["amount"] = validated_data["amount"] * -1
+        validated_data["amount"] = int(validated_data["amount"])
+        return models.Transaction.objects.create(**validated_data)

src/vinywaji/api/views.py

@@ -1,5 +1,10 @@
 from django.conf import settings
-from drf_spectacular.utils import OpenApiParameter, extend_schema, inline_serializer
+from drf_spectacular.utils import (
+    OpenApiParameter,
+    extend_schema,
+    extend_schema_view,
+    inline_serializer,
+)
 from rest_framework import status, views, viewsets
 from rest_framework.decorators import action
 from rest_framework.permissions import IsAdminUser, IsAuthenticated
@@ -29,6 +34,24 @@ def me(self, request):
         return Response(serializer.data)
 
 
+@extend_schema_view(
+    create=extend_schema(
+        parameters=[
+            OpenApiParameter(
+                "currency",
+                str,
+                enum=["ct", "euro"],
+                description="Currency in which the provided transaction amount is. If euro, it will be converted to cents automatically.",
+            ),
+            OpenApiParameter(
+                "type",
+                str,
+                enum=["purchase", "deposit"],
+                description="Type of transaction. If not given, negative transactions count as purchases and positive ones as deposits.",
+            ),
+        ]
+    )
+)
 class TransactionViewSet(
     viewsets.mixins.CreateModelMixin,
     viewsets.mixins.RetrieveModelMixin,
@@ -49,39 +72,3 @@ def get_permissions(self):
             return [IsAuthenticated()]
         else:
             return [(IsAdminUser | permissions.IsRelatedToRequester)()]
-
-    @extend_schema(
-        parameters=[
-            OpenApiParameter(
-                "currency",
-                str,
-                enum=["ct", "euro"],
-                description="Currency in which the provided transaction amount is. If euro, it will be converted to cents automatically.",
-            ),
-            OpenApiParameter(
-                "type",
-                str,
-                enum=["purchase", "deposit"],
-                description="Type of transaction. If not given, negative transactions count as purchases ans positive ones as deposits.",
-            ),
-        ]
-    )
-    def create(self, request: Request, *args, **kwargs):
-        # perform preliminary validation to make sure that later data modification does not fail unexpectedly
-        self.get_serializer(data=request.data).is_valid(raise_exception=True)
-
-        # force QueryDict to be mutable
-        data = request.data.copy()
-
-        # adjust requested transaction object according to query parameters
-        if "currency" in request.query_params and request.query_params["currency"] == "euro":
-            data["amount"] = int(float(data["amount"]) * 100)
-        if "type" in request.query_params and request.query_params["type"] == "purchase":
-            data["amount"] = int(data["amount"]) * -1
-
-        # create the transaction object
-        serializer = self.get_serializer(data=data)
-        serializer.is_valid(raise_exception=True)
-        self.perform_create(serializer)
-        headers = self.get_success_headers(serializer.data)
-        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)