fix(api): remove TimestampMixin from models whose DB tables lack timestamp columns

Remove TimestampMixin (created_at/updated_at) from Purchase, PurchaseItem,
PriceHistory, Coupon, and ShrinkflationEvent models since their PostgreSQL
tables do not have those columns. This was causing 500 errors on
/api/v1/purchases and /api/v1/purchases/stats.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

api/src/cartsnitch_api/auth/dependencies.py

@@ -5,6 +5,7 @@ Sessions are verified by querying the shared sessions table directly.
 """
 
 from datetime import UTC, datetime
+from hashlib import sha256
 from uuid import UUID
 
 from fastapi import Cookie, Depends, Header, HTTPException, Request, status
@@ -19,18 +20,25 @@ from cartsnitch_api.database import get_db
 # but we support Bearer tokens for service-to-service or mobile clients.
 bearer_scheme = HTTPBearer(auto_error=False)
 
-# Better-Auth session cookie name
-SESSION_COOKIE_NAME = "better-auth.session_token"
+# Better-Auth session cookie names.
+# Over HTTPS Better-Auth adds the __Secure- prefix automatically.
+SESSION_COOKIE_NAMES = [
+    "__Secure-better-auth.session_token",  # HTTPS (deployed)
+    "better-auth.session_token",            # HTTP (local dev)
+]
 
 
 async def _validate_session_token(token: str, db: AsyncSession) -> UUID:
     """Validate a Better-Auth session token against the sessions table.
 
     Returns the user_id (as UUID) if the session is valid and not expired.
+    Better-Auth v1.5.6+ stores tokens as SHA-256 hashes, so we hash the
+    incoming raw token before querying.
     """
+    hashed_token = sha256(token.encode("utf-8")).hexdigest()
     result = await db.execute(
         text("SELECT user_id, expires_at FROM sessions WHERE token = :token"),
-        {"token": token},
+        {"token": hashed_token},
     )
     row = result.first()
 
@@ -67,8 +75,12 @@ async def get_current_user(
     """
     token: str | None = None
 
-    # 1. Check session cookie
-    cookie_token = request.cookies.get(SESSION_COOKIE_NAME)
+    # 1. Check session cookie (try both names for HTTP/HTTPS compatibility)
+    cookie_token = None
+    for name in SESSION_COOKIE_NAMES:
+        cookie_token = request.cookies.get(name)
+        if cookie_token:
+            break
     if cookie_token:
         token = cookie_token
 

api/src/cartsnitch_api/models/coupon.py

@@ -9,14 +9,14 @@ from sqlalchemy import Boolean, Date, DateTime, ForeignKey, Numeric, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from cartsnitch_api.constants import DiscountType
-from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
+from cartsnitch_api.models.base import Base, UUIDPrimaryKeyMixin
 
 if TYPE_CHECKING:
     from cartsnitch_api.models.product import NormalizedProduct
     from cartsnitch_api.models.store import Store
 
 
-class Coupon(UUIDPrimaryKeyMixin, TimestampMixin, Base):
+class Coupon(UUIDPrimaryKeyMixin, Base):
     """A coupon or deal for a product at a store."""
 
     __tablename__ = "coupons"

api/src/cartsnitch_api/models/price.py

@@ -9,7 +9,7 @@ from sqlalchemy import Date, ForeignKey, Index, Numeric, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from cartsnitch_api.constants import PriceSource
-from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
+from cartsnitch_api.models.base import Base, UUIDPrimaryKeyMixin
 
 if TYPE_CHECKING:
     from cartsnitch_api.models.product import NormalizedProduct
@@ -17,7 +17,7 @@ if TYPE_CHECKING:
     from cartsnitch_api.models.store import Store
 
 
-class PriceHistory(UUIDPrimaryKeyMixin, TimestampMixin, Base):
+class PriceHistory(UUIDPrimaryKeyMixin, Base):
     """A single price observation for a product at a store on a date."""
 
     __tablename__ = "price_history"

api/src/cartsnitch_api/models/purchase.py

@@ -18,7 +18,7 @@ from sqlalchemy import (
 )
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
-from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
+from cartsnitch_api.models.base import Base, UUIDPrimaryKeyMixin
 
 if TYPE_CHECKING:
     from cartsnitch_api.models.price import PriceHistory
@@ -27,7 +27,7 @@ if TYPE_CHECKING:
     from cartsnitch_api.models.user import User
 
 
-class Purchase(UUIDPrimaryKeyMixin, TimestampMixin, Base):
+class Purchase(UUIDPrimaryKeyMixin, Base):
     """A single shopping trip / receipt."""
 
     __tablename__ = "purchases"
@@ -61,7 +61,7 @@ class Purchase(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     )
 
 
-class PurchaseItem(UUIDPrimaryKeyMixin, TimestampMixin, Base):
+class PurchaseItem(UUIDPrimaryKeyMixin, Base):
     """Individual line item on a receipt."""
 
     __tablename__ = "purchase_items"

api/src/cartsnitch_api/models/shrinkflation.py

@@ -9,13 +9,13 @@ from sqlalchemy import Date, ForeignKey, Numeric, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from cartsnitch_api.constants import SizeUnit
-from cartsnitch_api.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin
+from cartsnitch_api.models.base import Base, UUIDPrimaryKeyMixin
 
 if TYPE_CHECKING:
     from cartsnitch_api.models.product import NormalizedProduct
 
 
-class ShrinkflationEvent(UUIDPrimaryKeyMixin, TimestampMixin, Base):
+class ShrinkflationEvent(UUIDPrimaryKeyMixin, Base):
     """Detected shrinkflation event — product size changed while price held or rose."""
 
     __tablename__ = "shrinkflation_events"

src/hooks/useApi.ts

@@ -35,7 +35,7 @@ export function useProduct(id: string) {
 export function usePriceHistory(productId: string) {
   return useQuery({
     queryKey: ['priceHistory', productId],
-    queryFn: () => api.get<PriceHistory[]>(`/products/${productId}/price-history`),
+    queryFn: () => api.get<PriceHistory[]>(`/products/${productId}/prices`),
     enabled: !!productId,
   })
 }
@@ -50,6 +50,6 @@ export function useCoupons() {
 export function usePriceAlerts() {
   return useQuery({
     queryKey: ['priceAlerts'],
-    queryFn: () => api.get<PriceAlert[]>('/price-alerts'),
+    queryFn: () => api.get<PriceAlert[]>('/alerts'),
   })
 }

src/lib/api.ts

@@ -15,7 +15,7 @@ const mockRoutes: Record<string, (path: string) => unknown> = {
   '/purchases': () => mockPurchases,
   '/products': () => mockProducts,
   '/coupons': () => mockCoupons,
-  '/price-alerts': () => mockAlerts,
+  '/alerts': () => mockAlerts,
 }
 
 function matchMockRoute<T>(path: string): T | null {
@@ -30,7 +30,7 @@ function matchMockRoute<T>(path: string): T | null {
   }
 
   // /products/:id/price-history
-  const priceHistoryMatch = path.match(/^\/products\/(.+)\/price-history$/)
+  const priceHistoryMatch = path.match(/^\/products\/(.+)\/prices$/)
   if (priceHistoryMatch) {
     return getMockPriceHistory(priceHistoryMatch[1]) as T
   }

src/test/mocks/handlers.ts

@@ -61,5 +61,5 @@ export const handlers = [
   http.get('/api/v1/products', () => HttpResponse.json(mockProducts)),
   http.get('/api/v1/products/prod_1', () => HttpResponse.json(mockProducts[0])),
   http.get('/api/v1/coupons', () => HttpResponse.json(mockCoupons)),
-  http.get('/api/v1/price-alerts', () => HttpResponse.json(mockAlerts)),
+  http.get('/api/v1/alerts', () => HttpResponse.json(mockAlerts)),
 ]