Answered my own question here. My code was actually working fine at runtime, it's just that one of the objects it encountered which I had thought was a simple column was actually a ColumnProperty which of course had no 'nullable' attribute.
On Thursday, May 17, 2012 3:08:21 AM UTC-7, Eric Ongerth wrote: > > (using sqlalchemy 0.8.0b1) > > Using the new 8.0 inspection mechanism, I can perform the following on one > of my model classes in an ipython or bpython shell and obtain a boolean > result: > > >>> [... bunch of imports to load up my model classes ...] > >>> inspect(SomeClassOfMine).attr['foo'].columns[0].nullable > True > > But it seems I can only do this successfully in a shell. When the same > line of code is encountered at runtime, I get the following error: > AttributeError: '_Label' object has no attribute 'nullable' > > Further info: this is in a shell initiated with respect to my Pyramid > project by invoking "pshell -p bpython development.ini". > > What I'm actually trying to do: got some mako templates generating HTML > forms from my model classes, and just want to have non-nullable fields > generate the "required" keyword in my input elements. Perhaps there is > another better way to reach the 'nullable' property of a column? > > Fishing for an easy answer here, but if none is forthcoming I'll knuckle > down and build a testcase. > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To view this discussion on the web visit https://groups.google.com/d/msg/sqlalchemy/-/tnJBFf0OOtEJ. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
