#31582: Django template backend allocates model cache even iterator() is used
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Reporter: sumerc | Owner: nobody
Type: Bug | Status: new
Component: Template system | Version: 3.0
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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Hi,
I was testing template engines with a memory profiler we have written and
I have seen an interesting issue with Django template engine. Still not
sure if this is an issue or intended.
The database backend I use is django.db.backends.sqlite3. I am using
following code to retrieve a huge list of objects:
{{{
comments = Comment.objects.all().iterator()
template = loader.get_template('polls/comments.html')
context = {
'comments': comments,
}
return HttpResponse(template.render(context, request))
}}}
And the template code:
{{{
{% for comment in comments %}
a
{% endfor %}
}}}
When I ran the view, I see the
{{{django.db.models.base.Comment.__init__}}} caches the results. If I
change the TEMPLATE backend to {{{Jinja2}}} I verified it is not being
cached.
Is this somewhat intended behaviour? If so, how can we disable Model
caching for Django templates?
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Ticket URL: <https://code.djangoproject.com/ticket/31582>
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