On Jan 30, 6:09 am, min <inuyasha...@gmail.com> wrote:
> Thanks a lot.
>
> Besides, what's the meaning for the 'escape_js' in [var x =
> "{{ variable|escape_js }}"] ?
>
> Regards
> Min
>
> On Jan 30, 4:33 pm, Malcolm Tredinnick <malc...@pointy-stick.com>
> wrote:
>
> > On Thu, 2009-01-29 at 21:11 -0800, min wrote:
> > > Hi.
>
> > > First, the code in the forms.py:
>
> > > class TestForm(forms.Form):
> > > name = forms.CharField( max_length=30 )
>
> > > Then, the variable is defined in the views.py:
>
> > > def Test_page(request):
> > > form = TestForm()
> > > show_results = False
> > > variable = ''
> > > if request.GET.has_key('name'):
> > > show_results = True
> > > query = request.GET['name'].strip()
> > > variable = 'custom value'
> > > variables = RequestContext(request, {
> > > 'form': form,
> > > 'show_results': show_results,
> > > 'variable': variable
> > > })
> > > return render_to_response('Test.html', variables)
>
> > > I know the value of variable can be accessed by using {{variable}} in
> > > the Test.html. However, if I want use the jQuery in the Test.html and
> > > pass the value of this variable to the jQuery function, how to do
> > > that?
>
> > > I have tried: var x = $("variable").val(), and not succeed.
>
> > The context dictionary you pass to render_to_response is used by
> > render_to_response to produce a string. That string is what is sent back
> > to the browsers. The variables (parameters, whatever we want to call
> > them) are shoved into the template -- in a nice way; they're made very
> > comfortable -- and become static data in the final result. That is, they
> > are *not* variables from the browser's perspective. Template rendering
> > happens fully on the server side.
>
> > If you want to access this data via Javascript, you first have to make
> > it available as a Javascript variable in the template. For example, you
> > could write this in your template (inside a script block).
>
> > var x = "{{ variable|escape_js }}";
>
> > The {{...}} bit is converted to a string by the (server-side) template
> > rendering. Then "x" is available to the browser-side Javascript. Clear
> > as mud?
>
> > Regards,
> > Malcolm- Hide quoted text -
>
> > - Show quoted text -
"escape_js" is a template filter that the value of "variable" is
passed through before being sent to the browser.
See http://docs.djangoproject.com/en/dev/ref/templates/builtins/#escapejs
and
http://docs.djangoproject.com/en/dev/ref/templates/builtins/#built-in-template-tags-and-filters
in general.
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