I've been working for a while on a very flexible (and so increasingly complex) multiple-select widget that can be re-populated from the db via ajax (without submitting the form). One think I had to do was figure out how to get the name of the table referenced by the field using my widget. With some help from the folks here I found this solution:
referencetable = myfield.requires[0].ktable I'm starting to realize, though, that this is fragile. I know it's doing an end-run around the DAL api (accessing implementation details instead of the stable api). I also found recently that this was broken by the IS_EMPTY_OR validator. For the moment I'm hacking a solution by doing this: try: referencetable = myfield.requires[0].ktable except AttributeError: # because IS_EMPTY_OR doesn't have a property .ktable, # it's on the second, wrapped validator referencetable = myfield.requires[0].other.ktable But I'm digging myself a deeper hole. Now I'm using a second implementation detail (the "other" instance variable of IS_EMPTY_OR) and my widget is that much more prone to being broken by future releases. So I'm wondering whether (a) there's a way to access this data via the api that I'm just missing; or (b) this is reason to add access to the referenced table to the api. This could be as simple as adding a get_reference_table() method to the validators that (for the time being) draws on the instance variables I've been using. # in IS_EMPTY_OR def get_reference_table(self): return self.other.ktable # in IS_IN_DB def get_reference_table(self): return self.ktable I'm not sure, though, whether the validator is the best place for that method. Should it be a method of Field instead? (That is, if others see a need for this at all.) Cheers, Ian -- 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 web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.