On Monday, January 2, 2017 at 11:40:21 AM UTC-8, Anthony wrote: > > On Monday, January 2, 2017 at 1:36:59 PM UTC-5, Dave S wrote: >> >> I have a controller with >> >> r = db(db.mytable.PostDate is not None) >> > > The above is not a valid DAL query. It is literally equivalent to: > > db(True) > > Instead, you must use Python logical operators, as specified in the DAL > documentation: > > db(db.mytable.PostDate != None) > > The presence of the Field object in the above expression overrides the > usual behavior of the "!=" operator, returning a DAL Query object rather > than a Python boolean value. In your original query, there is no overriding > of "is not", so you simply get back a boolean True value (as the Field > object itself is not None). > > Anthony >
Ah, okay. I was rushing away from my machine this morning, so I didn't add that a query that checked for equality with req.vars.stuff worked fine. Your explanation shows why that worked and the above didn't. Thanks again ! /dps -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
