refactor: Update interest relation handling in generateActivityRefNumber function

src/modules/host/services/host.service.ts

@@ -73,6 +73,7 @@ export async function generateActivityRefNumber(
     throw new Error("Invalid activity type or interest not found");
   }
 
+  // Use the Interest's ID from the relation
   const interestId = activityType.interests.id;
   const interestCode = activityType.interests.interestCode;
 
@@ -81,7 +82,9 @@ export async function generateActivityRefNumber(
     where: {
       hostXid,
       activityType: {
-        interestId: interestId,
+        is: {
+          interestXid: interestId,
+        },
       },
     },
     select: {
@@ -103,17 +106,19 @@ export async function generateActivityRefNumber(
     // Count distinct interests already used by this host
     const distinctInterests = await tx.activities.findMany({
       where: { hostXid },
-      include: {
+      select: {
         activityType: {
           select: {
-            interestId: true,
+            interestXid: true,
           },
         },
       },
     });
 
     const uniqueInterestIds = new Set(
-      distinctInterests.map((a: any) => a.activityType.interestId)
+      distinctInterests
+        .map((a: any) => a.activityType?.interestXid)
+        .filter((id: number | null | undefined): id is number => id != null)
     );
 
     interestSequence = uniqueInterestIds.size + 1;