Add invitation code validation and auto-generation for guests

Validate uniqueness of invitation codes during guest creation to prevent duplicates. Automatically generate an 8-character code if none is provided, ensuring consistent data handling. Updated tests and schemas to support these changes.

backend/app/api/routes/events/guests.py

@@ -13,6 +13,14 @@ router = APIRouter()
 
 @router.post("/", response_model=GuestRead, operation_id="create_guest")
 def create_guest(guest_in: GuestCreate, db: Session = Depends(get_db)):
+    if guest_in.invitation_code:
+        existing_guest = guest_crud.get_by_invitation_code(db, guest_in.invitation_code)
+        if existing_guest:
+            raise HTTPException(
+                status_code=400, detail="Guest with this invitation code already exists"
+            )
+    else:
+        guest_in.invitation_code = str(uuid.uuid4())[:8]
     guest = guest_crud.create(db, obj_in=guest_in)
     return guest
 

backend/app/crud/guest.py

@@ -11,6 +11,10 @@ import uuid
 class CRUDGuest(CRUDBase[Guest, GuestCreate, GuestUpdate]):
 
     def create(self, db, obj_in: GuestCreate):
+
+        if obj_in.invitation_code is None:
+            obj_in.invitation_code = str(uuid.uuid4())[:8]
+
         db_guest = Guest(
             event_id=uuid.UUID(obj_in.event_id) if isinstance(obj_in.event_id, str) else obj_in.event_id,  # explicit casting
             invited_by=uuid.UUID(obj_in.invited_by) if isinstance(obj_in.invited_by, str) else obj_in.invited_by,

backend/app/schemas/guests.py

@@ -21,7 +21,7 @@ class GuestBase(BaseModel):
 
 
 class GuestCreate(GuestBase):
-    invitation_code: str
+    invitation_code: Optional[str] = None
 
 
 class GuestUpdate(BaseModel):
@@ -45,4 +45,5 @@ class GuestRead(GuestBase):
     response_date: Optional[datetime] = None
     actual_additional_guests: int
     is_blocked: bool
-    model_config = ConfigDict(from_attributes=True)
+    model_config = ConfigDict(from_attributes=True)
+    invitation_code: str