Field of type table_name with None option

[Dominik Simunek]

Hi all developers,

I want to have table_name field with base_table set to a table (e.g. task) so that you can select only tables inheriting base table however I want to still include -- None -- option as it is in e.g. Business Rules. The issue is that I found no attribute working for that so far and once I specify base_table=task in dictionary, the -- None -- option is gone. I have found two places in the platform where "includeNone" attribute is used for table_name field but it does not look working and it is not documented.

Do you have other idea, how to show -- None -- option in the same way as when the base table is not restricted?

Best regards,

Dominik

[Sharique Azim]

Dominik,   A similar suggestion was provided earlier though