What do you mean by absolute vs. relative URLs in this case, and why does that matter (i.e., show examples)? The URL function can generate absolute URLs <http://web2py.com/books/default/chapter/29/04#Absolute-urls> by specifying the scheme and host arguments, but it's not clear why you would need that in this case. Note, if your URL includes args or vars used to identify a specific record, then you can access the record identifier via request.args or request.vars within the function called by the URL.
Anthony On Wednesday, March 27, 2013 4:59:02 PM UTC-4, Lamps902 wrote: > > In the case that I'm dealing with, the image is incidental to the problem. > But let's say there is an image, and a relative URL (i.e. file download); > you can do something like this: > > db.my_db.file.represent = lambda x,y: \ > A(generate_image(y.file), > _href=URL(args=["my_db/download", x],vars = > dict(action="update_download_number", id=y.id))) > > Can't do this for absolute links. Maybe I'm misunderstanding your > suggestion, but the same image generator function will be invoked for all > of the rows in the table, so if I use that, all the rows end up being > updated, as opposed to the one which should be updated. So basically, I > think it comes down to how to go about creating a function that's invoked > when an absolute link is clicked, and passing an identifier related > specifically to that link to the function. > > On Wednesday, March 27, 2013 2:41:16 PM UTC-5, Niphlod wrote: >> >> so, you have an url (i.e. a string) that needs to return an image. >> you should have a controller that, when that URI is matched, returns the >> image after increasing its number_visited value.... seems pretty standard >> to me.... >> >> On Wednesday, March 27, 2013 7:15:12 PM UTC+1, Lamps902 wrote: >>> >>> Let's say you have an SQL grid generated from a db with field *my_url*, >>> which stores the value of an absolute URL, and has a representation defined >>> in this way: >>> >>> db.my_db.my_url.represent = lambda the_url, row: >>> A(generate_link_image(), _href=the_url, _target='_blank') >>> >>> What would be a good way to modify the above code so that when the link >>> is clicked, some field in *my_db* (for example, *number_visited*, >>> corresponding to the number of times the url has been clicked) is updated? >>> I'm not sure you can use _href=URL(...) with absolute links, and other >>> variants I've tried end up updating every record referenced in the table >>> rather than just the one that the user clicks. Thanks. >>> >> -- --- 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/groups/opt_out.
