Typo: when condition is non-empty
should be when conditionS is non-empty On Wed, Jan 8, 2014 at 1:53 PM, Michael Bayer <mike...@zzzcomputing.com> wrote: > a new section has been added as the first “Core Behavioral Change”: > > http://sqlalchemy.readthedocs.org/en/rel_0_9/changelog/migration_09.html#none-can-no-longer-be-used-as-a-partial-and-constructor > > > > On Jan 8, 2014, at 11:27 AM, Michael Bayer <mike...@zzzcomputing.com> wrote: > > > geez..its 10 degrees here, sorry, just scratch that first case, it has to be > like this to be fully compatible both ways: > > def my_select(conditions): > stmt = select([column('x')]) > if conditions: > stmt = stmt.where(and_(*conditions)) > return stmt > > “cond & None” was never any kind of publicly documented behavior and it was > inconsistent, sorry. > > > > > > > > > On Jan 8, 2014, at 11:22 AM, Michael Bayer <mike...@zzzcomputing.com> wrote: > > sorry, this should read: > > "Therefore, your script cannot work in either 0.8 or 0.9, unless you fix it > as follows, in which case it works the same in both versions:" > > def my_select(conditions): > cond = None > for c in conditions: > cond = c & cond > stmt = select([column(‘x’)]) > if cond is not None: > stmt = stmt.where(cond) > return stmt > > > > On Jan 8, 2014, at 11:20 AM, Michael Bayer <mike...@zzzcomputing.com> wrote: > > Therefore, your script cannot work in either 0.8 or 0.9, unless you fix it > as follows, in which case it works the same in both versions: > > def my_select(conditions): > cond = conditions[0] > for c in conditions[1:]: > cond = c & cond > stmt = select([column(‘x’)]) > if cond is not None: > stmt = stmt.where(cond) > return stmt > > or you assume that “conditions” is non-empty, in which case, as I mentioned > earlier, do this: > > def my_select(conditions): > cond = conditions[0] > for c in conditions[1:]: > cond = c & cond > > return select([column('x')]).where(cond) > > > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
