feat: Add billing rate and base unit price fields to account details scheduledPhase payload

apps/codecov-api/api/internal/owner/serializers.py

@@ -212,15 +212,24 @@ class StripeScheduledPhaseSerializer(serializers.Serializer):
     start_date = serializers.IntegerField()
     plan = serializers.SerializerMethodField()
     quantity = serializers.SerializerMethodField()
+    billing_rate = serializers.SerializerMethodField()
+
+    def _get_plan_object(self, phase: dict[str, Any]) -> Plan:
+        """Helper method to get and cache the Plan object."""
+        if not hasattr(self, "_cached_plan"):
+            plan_id = phase["items"][0]["plan"]
+            self._cached_plan = Plan.objects.get(stripe_id=plan_id)
+        return self._cached_plan
 
     def get_plan(self, phase: dict[str, Any]) -> str:
-        plan_id = phase["items"][0]["plan"]
-        marketing_plan_name = Plan.objects.get(stripe_id=plan_id).marketing_name
-        return marketing_plan_name
+        return self._get_plan_object(phase).marketing_name
 
     def get_quantity(self, phase: dict[str, Any]) -> int:
         return phase["items"][0]["quantity"]
 
+    def get_billing_rate(self, phase: dict[str, Any]) -> str | None:
+        return self._get_plan_object(phase).billing_rate
+
 
 class ScheduleDetailSerializer(serializers.Serializer):
     id = serializers.CharField()

apps/codecov-api/api/internal/tests/views/test_account_viewset.py

@@ -19,7 +19,11 @@
     OwnerFactory,
     UserFactory,
 )
-from shared.plan.constants import DEFAULT_FREE_PLAN, PlanName, TrialStatus
+from shared.plan.constants import (
+    DEFAULT_FREE_PLAN,
+    PlanName,
+    TrialStatus,
+)
 from utils.test_utils import APIClient
 
 curr_path = os.path.dirname(__file__)
@@ -295,6 +299,7 @@ def test_retrieve_account_gets_account_fields_when_there_are_scheduled_details(
                     "start_date": schedule_params["start_date"],
                     "plan": "Pro",
                     "quantity": schedule_params["quantity"],
+                    "billing_rate": "annually",
                 },
             },
             "student_count": 0,
@@ -354,11 +359,21 @@ def test_retrieve_account_returns_last_phase_when_more_than_one_scheduled_phases
         phases = [
             {
                 "start_date": 123689126536,
-                "items": [{"plan": "test_plan_123", "quantity": 4}],
+                "items": [
+                    {
+                        "plan": "test_plan_123",
+                        "quantity": 4,
+                    }
+                ],
             },
             {
                 "start_date": 123689126636,
-                "items": [{"plan": "test_plan_456", "quantity": 5}],
+                "items": [
+                    {
+                        "plan": "test_plan_456",
+                        "quantity": 5,
+                    }
+                ],
             },
             {
                 "start_date": schedule_params["start_date"],
@@ -430,6 +445,7 @@ def test_retrieve_account_returns_last_phase_when_more_than_one_scheduled_phases
                     "plan": "Pro",
                     "quantity": schedule_params["quantity"],
                     "start_date": schedule_params["start_date"],
+                    "billing_rate": "annually",
                 },
             },
             "uses_invoice": False,