Jonathan is right. Here is a simple way around.
Create a single controller called dynamical. use request.args(0) to
parse the name of one of the dynamical actions and remap
def dynamical():
actionname, request.args[:] = request.args(0), request.args[1:]
# call actionname and pass request.args and request.vars
use routes to remove the 'dynamical/' part form the URL.
This allows you to do what you want without necessarily meta-
programming.
On Jul 6, 9:35 am, Miguel Lopes <[email protected]> wrote:
> Thanks. In conjunction with routes could supply a solution (shortening the
> urls).
> I think I should rethink the payoff (see my reply to Massimo regarding my
> goals).
> Thanks,
> Miguel
>
>
>
>
>
>
>
> On Wed, Jul 6, 2011 at 3:12 PM, Jonathan Lundell <[email protected]> wrote:
> > On Jul 6, 2011, at 1:23 AM, Miguel Lopes wrote:
>
> > I'm experimenting with dynamically generating functions, aka 'actions' in
> > controllers. However, I've been unsuccessful. I can use exec and closures
> > successfully in regular Python code, but I can't make it work with web2py.
> > Any thoughts on how to achieve this?
>
> > web2py finds functions by reading the (static) controller file itself. See
> > gluon.compileapp.run_controller_in, in particular this line:
>
> > exposed = regex_expose.findall(code)
>
> > So, no dynamically generated controller actions, at least not directly.
>
> > I haven't given this much thought, but one way you might accomplish the
> > same effect would be to push the dynamic function name down one level in the
> > URL, something like:http://domain.com/app/dynamic/index/function/...
>
> > ...where 'dynamic' is the controller with dynamic functions, and index is a
> > (static) function that calls function dynamically. You might optimize the
> > lookup function to extract only the one desired function from your page
> > table.
>
> > Depending on your overall URL structure, you could rewrite the URLs to
> > shorten them up.
>
> > A closure example - FAILS in web2py:
> > top_pages = db(db.page.id > 0).select()
> > def add_actions(top_pages):
> > for page in top_pages:
> > def inneraction(msg):
> > sidebar = None
> > return dict(message=msg, sidebar=sidebar)
> > inneraction.__name__ = page.link_name
> > globals()[page.link_name] = inneraction
>
> > add_actions(top_pages)
>
> > A exec example - FAILS in web2py:
>
> > ACTION_TEMPLATE = """
> > def NEW_ACTION():
> > sidebar = None
> > return dict(message='s', sidebar=sidebar)
> > """
> > top_pages = db(db.page.id > 0).select()
> > def makePages(pages):
> > for page in top_pages:
> > exec ACTION_TEMPLATE
> > NEW_ACTION.__name__ = page.link_name
> > globals()[page.link_name] = NEW_ACTION
>
> > makePages(pages)
>
> > Miguel
