booleans in T-SQL are not treated the same way as python..... in T-SQL, 
NULL values are neither True or False, they are just NULL.

So, if you want closed either None or False, you should do

((db.progs.closed == None) | (db.progs.closed == False))

one shortcut to it would be

db.progs.closed.belongs((None, False))

that'll turn this syntax to the previous one, effectively selecing both 
None and False values.

On Sunday, March 8, 2015 at 7:23:54 PM UTC+1, Dmitry Ermolaev wrote:
>
> db((db.progs.promo==True) & (db.progs.closed!=True)).select():
> or
> db((db.progs.promo==True) & ~(db.progs.closed==True)).select():
>
>
> not worked ((
> if exist record wirh promo=True and closed=None or False - it not selected!
>

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