server/AyaNova/biz/CustomerBiz.cs

@@ -156,7 +156,7 @@ namespace AyaNova.Biz
                         AddError(ApiErrorCode.NOT_FOUND);
                         return false;
                     }
-                    await ValidateCanDelete(dbObject);
+                    await ValidateCanDeleteAsync(dbObject);
                     if (HasErrors)
                         return false;
 
@@ -286,7 +286,7 @@ namespace AyaNova.Biz
         }
 
 
-        private async Task ValidateCanDelete(Customer inObj)
+        private async Task ValidateCanDeleteAsync(Customer inObj)
         {
             //## NOTE: contact isn't so important, this could be changed to check only more important things like workorders etc
             //and just attempt to delete all the contacts if possible, but for now....

server/AyaNova/biz/HeadOfficeBiz.cs

@@ -151,15 +151,31 @@ namespace AyaNova.Biz
                 try
                 {
                     HeadOffice dbObject = await ct.HeadOffice.SingleOrDefaultAsync(z => z.Id == id);
-                     if (dbObject == null){
+                    if (dbObject == null)
+                    {
                         AddError(ApiErrorCode.NOT_FOUND);
                         return false;
                     }
                     ValidateCanDelete(dbObject);
                     if (HasErrors)
                         return false;
-                    if (HasErrors)
+
+
+                    //DELETE DIRECT CHILD OBJECTS 
+                    {
+                        var ContactIds = await ct.User.AsNoTracking().Where(z => z.HeadOfficeId == id).Select(z => z.Id).ToListAsync();
+                        if (ContactIds.Count() > 0)
+                        {
+                            UserBiz b = new UserBiz(ct, UserId, UserTranslationId, CurrentUserRoles);
+                            foreach (long ItemId in ContactIds)
+                                if (!await b.DeleteAsync(ItemId, transaction))
+                                {
+                                    AddError(ApiErrorCode.CHILD_OBJECT_ERROR, null, $"HeadOfficeContact [{ItemId}]: {b.GetErrorsAsString()}");
                                     return false;
+                                }
+                        }
+                    }
+
                     ct.HeadOffice.Remove(dbObject);
                     await ct.SaveChangesAsync();
 
@@ -173,6 +189,8 @@ namespace AyaNova.Biz
                 }
                 catch
                 {
+                    //NOTE: no need to rollback the transaction, it will auto-rollback if not committed and it is disposed when it goes out of scope either way
+
                     //Just re-throw for now, let exception handler deal, but in future may want to deal with this more here
                     throw;
                 }
@@ -246,9 +264,16 @@ namespace AyaNova.Biz
 
         }
 
-        private void ValidateCanDelete(HeadOffice inObj)
+
+        private async Task ValidateCanDeleteAsync(HeadOffice inObj)
         {
-            //whatever needs to be check to delete this object
+            //Referential integrity 
+            if (await ct.Customer.AnyAsync(z => z.HeadOfficeId == inObj.Id) == true)
+            {
+                //Note: errorbox will ensure it appears in the general errror box and not field specific
+                //the translation key is to indicate what the linked object is that is causing the error
+                AddError(ApiErrorCode.VALIDATION_REFERENTIAL_INTEGRITY, "errorbox", "LT:Customer");
+            }
         }