main <- develop

backend/app/Http/Request/Attendee/CreateAttendeeRequest.php

@@ -13,7 +13,7 @@ public function rules(): array
     {
         return [
             'ticket_id' => ['int', 'required'],
-            'ticket_price_id' => ['int', 'nullable'],
+            'ticket_price_id' => ['int', 'nullable', 'required'],
             'email' => ['required', 'email'],
             'first_name' => 'string|required',
             'last_name' => 'string',

backend/app/Services/Handlers/Attendee/CreateAttendeeHandler.php

@@ -69,9 +69,11 @@ public function handle(CreateAttendeeDTO $attendeeDTO): AttendeeDomainObject
                     TicketDomainObjectAbstract::EVENT_ID => $attendeeDTO->event_id,
                 ]);
 
+            $ticketPriceId = $this->getTicketPriceId($attendeeDTO, $ticket);
+
             $availableQuantity = $this->ticketRepository->getQuantityRemainingForTicketPrice(
                 $attendeeDTO->ticket_id,
-                $attendeeDTO->ticket_price_id,
+                $ticketPriceId,
             );
 
             if ($availableQuantity <= 0) {
@@ -80,7 +82,6 @@ public function handle(CreateAttendeeDTO $attendeeDTO): AttendeeDomainObject
                     ' please adjust the ticket\'s available quantity.'));
             }
 
-            $ticketPriceId = $this->getTicketPriceId($attendeeDTO, $ticket);
 
             $this->processTaxesAndFees($attendeeDTO);
 

backend/app/Services/Handlers/Attendee/EditAttendeeHandler.php

@@ -47,8 +47,8 @@ public function handle(EditAttendeeDTO $editAttendeeDTO): AttendeeDomainObject
     private function adjustTicketQuantities(AttendeeDomainObject $attendee, EditAttendeeDTO $editAttendeeDTO): void
     {
         if ($attendee->getTicketPriceId() !== $editAttendeeDTO->ticket_price_id) {
-            $this->ticketQuantityService->decreaseQuantitySold($editAttendeeDTO->ticket_price_id);
-            $this->ticketQuantityService->increaseQuantitySold($attendee->getTicketPriceId());
+            $this->ticketQuantityService->decreaseQuantitySold($attendee->getTicketPriceId());
+            $this->ticketQuantityService->increaseQuantitySold($editAttendeeDTO->ticket_price_id);
         }
     }
 
@@ -59,6 +59,7 @@ private function updateAttendee(EditAttendeeDTO $editAttendeeDTO): AttendeeDomai
             'last_name' => $editAttendeeDTO->last_name,
             'email' => $editAttendeeDTO->email,
             'ticket_id' => $editAttendeeDTO->ticket_id,
+            'ticket_price_id' => $editAttendeeDTO->ticket_price_id,
         ], [
             'event_id' => $editAttendeeDTO->event_id,
         ]);
@@ -82,6 +83,13 @@ private function validateTicketId(EditAttendeeDTO $editAttendeeDTO): void
             ]);
         }
 
+        $ticketPriceIds = $ticket->getTicketPrices()->map(fn($ticketPrice) => $ticketPrice->getId())->toArray();
+        if (!in_array($editAttendeeDTO->ticket_price_id, $ticketPriceIds, true)) {
+            throw ValidationException::withMessages([
+                'ticket_price_id' => __('Ticket price ID is not valid'),
+            ]);
+        }
+
         $availableQuantity = $this->ticketRepository->getQuantityRemainingForTicketPrice(
             ticketId: $editAttendeeDTO->ticket_id,
             ticketPriceId: $ticket->getType() === TicketType::TIERED->name

frontend/src/components/modals/EditAttendeeModal/index.tsx

@@ -50,6 +50,18 @@ export const EditAttendeeModal = ({onClose, attendeeId}: EditAttendeeModalProps)
 
     }, [isFetched]);
 
+    useEffect(() => {
+        if (!form.values.ticket_id) {
+            return;
+        }
+
+        let ticketPriceId = event?.tickets?.find(ticket => ticket.id == form.values.ticket_id)?.prices?.[0]?.id;
+        form.setValues({
+            ...form.values,
+            ticket_price_id: String(ticketPriceId),
+        });
+    }, [form.values.ticket_id]);
+
     const handleSubmit = (values: EditAttendeeRequest) => {
         mutation.mutate({
             attendeeId: attendeeId,