more progress to better serializer

core/utils.py

@@ -326,9 +326,6 @@ def shared_use_machine(request):
     else:
         print(f" -  shared use cookie exists, but has wrong value: '{cookie_txt}' not '{PUBLIC_LAPTOP_COOKIE_TEXT}'")
         return True
-
-
-
     
 def get_cookie(request):
     """The initial idea of having a default turned out to be a bad idea as people just ignore the field.
@@ -539,6 +536,18 @@ class WriteAndCommitError(Exception):
     def __str__(self):
         return f"WriteAndCommitError: {self.message}"
 
+# Custom JSON Encoder to handle non-serializable types
+class CustomJSONEncoder(json.JSONEncoder):
+    def default(self, obj):
+        # Convert datetime objects to ISO 8601 string format
+        if isinstance(obj, datetime):
+            return obj.isoformat()
+        # Convert Decimal objects to string
+        if isinstance(obj, Decimal):
+            # Use str() for perfect precision, or float() for numerical representation
+            return str(obj)
+        # Let the base class handle other types
+        return json.JSONEncoder.default(self, obj)
 
 """The following is a Bard converted version of Radosts's MIT copyrighted Javascript on 2023-10-27
     with hand-editing.