Hello,

I am working with a Boolean field in Odoo and trying to use it in a group-by operation. However, I noticed that when the field is NULL in the database, Odoo automatically treats it as `False` when grouping records.

Expected Behavior:

-True → Grouped as "True"

- False → Grouped as "False"

- NULL (Undefined) → Should be grouped as "Undefined"

### Actual Behavior:

True → Grouped as "True"

False → Grouped as "False"

NULL → Also grouped as "False" instead of "Undefined"

It seems like Odoo's ORM considers `NULL` as `False`, which causes all uninitialized records to appear in the "No" group.

My Questions:

1. How can I make Odoo show an "Undefined" category for NULL values in a Boolean field?

2. Is there a built-in way to handle this in the ORM or do I need a computed field?

3. Any best practices for handling Boolean fields in grouping?

I am using **Odoo11 Enterprise**.

Any help would be appreciated. Thanks!