Handling of total amount in shopping events

backend/main.py

@@ -200,7 +200,7 @@ def create_shopping_event(event: schemas.ShoppingEventCreate, db: Session = Depe
 
 @app.get("/shopping-events/", response_model=List[schemas.ShoppingEventResponse])
 def read_shopping_events(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
-    events = db.query(models.ShoppingEvent).offset(skip).limit(limit).all()
+    events = db.query(models.ShoppingEvent).order_by(models.ShoppingEvent.created_at.desc()).offset(skip).limit(limit).all()
     return [build_shopping_event_response(event, db) for event in events]
 
 @app.get("/shopping-events/{event_id}", response_model=schemas.ShoppingEventResponse)

backend/schemas.py

@@ -53,7 +53,7 @@ class Shop(ShopBase):
 class GroceryInEvent(BaseModel):
     grocery_id: int
     amount: float = Field(..., gt=0)
-    price: float = Field(..., gt=0)  # Price at the time of this shopping event
+    price: float = Field(..., ge=0)  # Price at the time of this shopping event (allow free items)
 
 class GroceryWithEventData(BaseModel):
     id: int