that sounds like an awesome reuse of the existing SQLFORM functionality, and would be nice to see live form checks before pressing submit.
You do an AJAX call whenever the text box changes - wouldn't that produce too many calls? Richard On Nov 13, 1:35 pm, Thadeus Burgess <[email protected]> wrote: > It is possible to use the web2py validators and javascript (AJAX). Post the > data to the server, and then return an msg that tells details about the > code. This way, a user can look to see if anything is wrong (if javascript > is enabled), and the form will still be validated on post, so you don't lose > any security. > > Basically, I actually use the web2py validators to validate the data. > Whenever the content of a text box changes, I use javascript to post the > name of the field, and value to the server using AJAX. Web2py then accesses > the field in SQLFORM, and runs the data through validation, and returns with > the response (errorcode/ etc). > > The only requirement is your SQLFORM variable will need to be outside all of > your actions at the top of the file. > > I can post some code, however I use a python javascript library I am working > on to make some things easy. > (py2jquery,http://hg.thadeusb.com/public/.r/Web/py2jquery/) > > def validate_ajax(field): > callback = Call(callback=validate, args=[field], data="input[name='%s']" > % field, request=request) > event = Event("change", "no_table_%s" % field, callback) > manager.add(event, True) > > def validate(): > field = request.args(0) > value = None > for var, val in request.post_vars.items(): > value = val > > if isinstance(value, str): > if field == 'name': > value = value.capitalize() > if field == 'email': > value = value.lower() > > (value, error) = signup_form.table[field].validate(value) > if error is None: > return signup_form_clear(field) # this returns jquery string that > gets evaled on the client side. All this does is reset the css to default > and clear the error message > else: > return signup_form_error(field, error) # this returns a jquery > string that gets evaled and that will replace the backgroudn to red, and > place the erro rmessage after the input. > > def signup(): > no_ajax = ('dob', 'state', ....etc...) > for field in signup_form.fields: > if field not in no_ajax: > validate_ajax(field) > > -Thadeus > > On Thu, Nov 12, 2009 at 8:14 PM, Richard <[email protected]> wrote: > > > Hello, > > > I was wondering if it would be possible/practical for SQLFORM to > > support some basic client side checks before submitting to the > > server. > > > SQLFORM has so many features, which I doubt could all be covered > > client side, but it would make forms more responsive if atleast a > > subset was. > > > Richard > > > (My particular use case is an upload form with a text field that > > requires input of a minimum length. If the user doesn't enter enough > > text then the form is submitted to the server before coming back with > > an error message. The user then needs to reselect their upload file > > because this is not saved.) > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
