2013/4/25 Tomas Schertel <[email protected]> > > > On Wednesday, 24 April 2013 19:58:42 UTC-3, Steven Brown wrote: >> >> I have a few questions, and I'm not even sure how to google for them. I >> am writing a page with a form. The form consists of several identical >> lines of fields, where the user can fill in as many or as few lines of >> information as they want. So, each line is going to have a date field, a >> dropdown indicating a selected option, and a text box for some notes. Now, >> I'm sure I could implement this by building the python-side form array with >> a loop, where every time through the loop adds another set of fields to the >> list of fields. My question is, on the HTML side, how should I access them >> to render them? My first instinct is to just use an eval statement; >> something like >> >> $:for i in range(10): >> eval('form.date' + i + '.render()') >> eval('form.choice' + i + '.render()') >> eval('form.notes' + i + '.render()') >> print '<br/ >' >> >> But this seems inelegant, not least because everyone has always drilled into >> me to never >> use eval except in the most dire of circumstances. Is there a better way? >> What would also be >> good, is if there was some way I could define how to render a single line, >> in another place, >> >> and then call that process inside the for loop above. >> >> Another thing I am trying to do in the cleanest, most efficient way possible >> is change >> what's in the dropdown, depending on what is selected in the date field (and >> later another >> >> dropdown). I found this: >> http://stackoverflow.com/**questions/8763564/how-do-i-**update-a-dropdown-menu-when-**another-dropdown-menu-option-**is-selected >> >> <http://stackoverflow.com/questions/8763564/how-do-i-update-a-dropdown-menu-when-another-dropdown-menu-option-is-selected> >> >> which suggests using jQuery, but I'm wondering first, if there is any way >> strictly within web.py >> to do it. Second, I am going to populate the dropdown from a database, and >> the only way I can >> figure of doing everything, I need to a database query for every set of >> options. So, am I >> >> correct in that assumption, or is there is a way to minimize dB hits. >> >> Finally, is there a better place to get documentation for web.py? webpy.org >> seems pretty sparse, >> >> not to mention poorly organized. >> >> > To populate dropdown with database values, you can use a jquery plugin. > Two examples: > https://github.com/tuupola/jquery_chained > http://github.e-sites.nl/populate/ > > > -- > You received this message because you are subscribed to the Google Groups > "web.py" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/webpy?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > >
I think this can help you: http://jolthgs.wordpress.com/2012/07/28/listas-desplegables-encadenadas-con-ajax-en-jquery/ -- You received this message because you are subscribed to the Google Groups "web.py" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/webpy?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
