Thanks heaps for your response. I will have a look into it. Cheers,
On Wed, Jun 7, 2017 at 9:22 AM, Bernd Wechner <bernd.wech...@gmail.com> wrote: > If you want a sample for a javascript postback when drop down changes I > have one here: > > https://github.com/bernd-wechner/CoGs/blob/master/ > Leaderboards/templates/CoGs/view_leaderboards.html > > It's attached to the select "selNames" which you can trace to the Django > view "ajax_Leaderboards" in: > > https://github.com/bernd-wechner/CoGs/blob/master/Leaderboards/views.py > > if you're patient. > > Might be easier to find some simple tutorials than wade through my code, > but hey, it's there to look at if you want to see a working demo (almost, > that site isn't live yet so can't point you at it running alas). > > Regards, > > Bernd. > > sum abiut wrote: > > Thanks heaps for your response. It really clear things up and help me get > started. > > Cheers, > > > > On Wed, Jun 7, 2017 at 5:05 AM, ludovic coues <cou...@gmail.com> wrote: > > The short answer to "how can I know what option is selected before > doing the queyr" is "you cannot know". > > Here is a quick drawing of your timeline > > request to your server -> process view (where you do db request) -> > process template -> send request back to user -> user select an option > > At no point you can go backward in this schema. The trick is to do it > again. > > The easy solution is to put the select in a form with a submit button > named "search" or "filter". The first time you show the page, you > display an empty or full list. When your user submit the form, you > know which option they have selected. > > > If you involve javascript, you can make it as complex as you want. > First solution is to force a form submission as soon as the value of > the select change. Next solution is to not reload the whole page but > do an ajax call. That ajax request can either return the whole list as > a fragment of HTML to replace the previous list or some formatted > data, as JSON for example that you can use to replace the data in the > list. Last solution would be to not use the server for the filtering. > Send everything to the user and use javascript to filter the data > according to the value of the select. With no request to your server, > data will be updated really fast. That solution work really well for > small to medium amount of data. > > 2017-06-06 7:40 GMT+02:00 sum abiut <suab...@gmail.com>: > > Hi, > > need some directions, i need to query the my database and display the > result > > of the query in the table. to do that i want to use a drop down menu and > get > > the users to select options from the drop menu on the template. > > > > for example if a user select a word from the drop down menu i want to > filter > > and query the database base on the option that is selected and then > display > > the result. > > > > I am confuse on the template side. on the template side how to i know if > a > > user select a particular option from the drop down before so that i can > > perform query base on option that was selected from the template and > display > > query result base on the respective word that was select. > > > > Cheers, > > > > -- > > You received this message because you are subscribed to the Google Groups > > "Django users" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to django-users+unsubscr...@googlegroups.com. > > To post to this group, send email to django-users@googlegroups.com. > > Visit this group at https://groups.google.com/group/django-users. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/django-users/CAPCf-y5ZZdhw > V-D71SVQ-50dQDFbhNP7KtBZMR0x7NiBVVQh9A%40mail.gmail.com. > > For more options, visit https://groups.google.com/d/optout. > > > > -- > > Cordialement, Ludovic Coues > +33 6 14 87 43 42 > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com. > To post to this group, send email to django-users@googlegroups.com. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit https://groups.google.com/d/ms > gid/django-users/CAEuG%2BTbxgksBG-JL%3DgCKEXPaq4%2BO1VbLoJjN > o6S1FgYTTP1Qsw%40mail.gmail.com. > For more options, visit https://groups.google.com/d/optout. > > > > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com. > To post to this group, send email to django-users@googlegroups.com. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/django-users/CAPCf-y5wwPHnw5u7_FeaEQnK%2B% > 3Dj4moC7R8sn-hu2eXf0EbZUvw%40mail.gmail.com > <https://groups.google.com/d/msgid/django-users/CAPCf-y5wwPHnw5u7_FeaEQnK%2B%3Dj4moC7R8sn-hu2eXf0EbZUvw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com. > To post to this group, send email to django-users@googlegroups.com. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/django-users/71a00382-bef1-6b18-1f4c-f3d9ba522859%40gmail.com > <https://groups.google.com/d/msgid/django-users/71a00382-bef1-6b18-1f4c-f3d9ba522859%40gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- -- You received this message because you are subscribed to the Google Groups "Django users" group. 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