On Wed, 2007-07-04 at 22:52 +0000, Steve Bergman wrote:
> I am working on a report generator which needs to render potentially
> huge sets of data into an html table.
>
> The method that generates the rows is an iterator. I believe that if
> I do something like:
>
> return HttpResponse(my_iterator())
>
> it will do what I want. Except that I want to do it with a template.
>
> I can do something like:
>
> return render_to_response('report.html',
> dict(output=generate_output()))
>
> and it works, but it does all the rendering before it starts sending
> to the browser, incurring the potentially large memory requirements of
> doing so.
That's correct. Templates render to a string and that string is passed
upstream. If you search the archives, you'll see that we recently tried
to switch to iterative rendering and a lot of unintended side-effects
showed up. So that is being worked on a bit more before we try again.
Note also, that a lot of middleware will interfere with your intentions
here: any middleware that needs to examine the content to do its work as
part of process_response() is going to have to convert the iterator to a
string, so you'll need to be careful in your configuration.
Regards,
Malcolm
--
Quantum mechanics: the dreams stuff is made of.
http://www.pointy-stick.com/blog/
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