[web2py] Re: using a representation of an absolute URL to update a db?
Thanks to both of you guys! After a much needed rest, I got it working with a solution comparable to what you guys specified/described. Anthony - I noticed the book's section on using the *host* and *scheme*parameters for URL(), but was a bit thrown off - is there a way to use URL() to point to a page (i.e. google.com) outside of your site (whatever tinkering I did with URL(), it was always appending or prepending some elements of my site's address to the URL pointing to another page)? -- --- 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.
[web2py] Re: using a representation of an absolute URL to update a db?
The URL() function is primarily intended for generating web2py URLs, not external URLs. It will always add a controller and function (if none are specified, it will use the controller and function of the current request). Anthony On Thursday, March 28, 2013 10:36:15 AM UTC-4, Lamps902 wrote: Thanks to both of you guys! After a much needed rest, I got it working with a solution comparable to what you guys specified/described. Anthony - I noticed the book's section on using the *host* and *scheme*parameters for URL(), but was a bit thrown off - is there a way to use URL() to point to a page (i.e. google.com) outside of your site (whatever tinkering I did with URL(), it was always appending or prepending some elements of my site's address to the URL pointing to another page)? -- --- 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.
[web2py] Re: using a representation of an absolute URL to update a db?
Got it. Thank you! On Thursday, March 28, 2013 9:41:03 AM UTC-5, Anthony wrote: The URL() function is primarily intended for generating web2py URLs, not external URLs. It will always add a controller and function (if none are specified, it will use the controller and function of the current request). Anthony On Thursday, March 28, 2013 10:36:15 AM UTC-4, Lamps902 wrote: Thanks to both of you guys! After a much needed rest, I got it working with a solution comparable to what you guys specified/described. Anthony - I noticed the book's section on using the *host* and *scheme*parameters for URL(), but was a bit thrown off - is there a way to use URL() to point to a page (i.e. google.com) outside of your site (whatever tinkering I did with URL(), it was always appending or prepending some elements of my site's address to the URL pointing to another page)? -- --- 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.
[web2py] Re: using a representation of an absolute URL to update a db?
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 web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: using a representation of an absolute URL to update a db?
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 web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: using a representation of an absolute URL to update a db?
uhm... I didn't quite understand, but it seems that you want different things to happen when printing the url and when accessing the url. Why is hard separating printing a link logic from the accessing the link one ? It's a common construct, i.e. on one page click here to like the image and on another page - image - you liked this image the second page, either accessed as a relative or as an absolute url, makes no difference from the web2py standpoint. If I totally missed your requirements, can you give a plain english explanation on what you're trying to accomplish ? PS: I'm on gtalk for the next hour if this requires a long digression :P -- --- 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.
[web2py] Re: using a representation of an absolute URL to update a db?
Thanks, Niphlod. It may require some digression/elaboration, so do you mind if I get in touch with you about this tomorrow? Hopefully, after I get some rest, I'll be able to articulate the issue a bit better... On Wednesday, March 27, 2013 4:08:46 PM UTC-5, Niphlod wrote: uhm... I didn't quite understand, but it seems that you want different things to happen when printing the url and when accessing the url. Why is hard separating printing a link logic from the accessing the link one ? It's a common construct, i.e. on one page click here to like the image and on another page - image - you liked this image the second page, either accessed as a relative or as an absolute url, makes no difference from the web2py standpoint. If I totally missed your requirements, can you give a plain english explanation on what you're trying to accomplish ? PS: I'm on gtalk for the next hour if this requires a long digression :P -- --- 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.
[web2py] Re: using a representation of an absolute URL to update a db?
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 web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[web2py] Re: using a representation of an absolute URL to update a db?
Specifically, maybe something like this:
db.define_table('image',
Field('file', 'upload', represent=lambda v, r: A(generate_image(v),
_href=URL('default', 'download', args=v, vars=dict(action=
'update_download_number', id=r.id,
Field('downloads', 'integer', default=0, writable=False))
def download():
if request.vars.action == 'update_download_number':
db.image(request.vars.id).update_record(downloads=db.image.downloads
+ 1)
return response.download(request, db)
Anthony
On Wednesday, March 27, 2013 5:46:28 PM UTC-4, Anthony wrote:
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.
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