Of course. Thank you. I'm nearly braindead from doing taxes.
On Apr 12, 11:12 am, "Karen Tracey" <[EMAIL PROTECTED]> wrote:
> On Sat, Apr 12, 2008 at 9:28 AM, Jonathan Lukens <[EMAIL PROTECTED]>
> wrote:
>
>
>
>
>
> > I started getting an IndexError on a page today that has worked fine
> > in the past. The uses a wrapped object_list generic view to render a
> > template with the following loop:
>
> > {% for baby in object_list %}
> > {% if baby.photo %}
> > <p><img src="{{ baby.photo.get_thumbnail_url }}"
> > /></p>
> > {% endif %}
> > <p>
> > <a href="{{ baby.get_absolute_url }}">
> > {{ baby.display_name }} {{ baby.last_name }}...</a>
> > </p>
> > <p>... is {{ baby.age }}</p>
> > {% endfor %}
>
> > I tried generating the same list in shell and was able to run a for
> > loop on it without any trouble. I compared the model and the template
> > with the last commit to svn (which worked) and nothing was different
> > except a couple of custom methods on the model being looped over. I
> > commented out those methods and restarted the server but got the same
> > error. Here is the traceback:
>
> > File "/usr/lib/python2.5/site-packages/django/template/debug.py" in
> > render_node
> > 71. result = node.render(context)
> > File "/usr/lib/python2.5/site-packages/django/template/defaulttags.py"
> > in render
> > 149. nodelist.append(node.render(context))
> > File "/usr/lib/python2.5/site-packages/django/template/defaulttags.py"
> > in render
> > 239. value = bool_expr.resolve(context, True)
> > File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in
> > resolve
> > 518. obj = self.var.resolve(context)
> > File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in
> > resolve
> > 659. value = self._resolve_lookup(context)
> > File "/usr/lib/python2.5/site-packages/django/template/__init__.py" in
> > _resolve_lookup
> > 694. current = current()
>
> This is the line of code causing the problem:
>
> File "/home/jonathan/workspace/datababy/src/datababy/child/models.py"
>
> > in photo
> > 96. return self.photo_set.all()[0]
>
> It is assuming there is at least one photo in the set, but apparently there
> are none. This would seem to be coming from the {% if baby.photo %} line in
> your template. Your code needs to handle the case where
> self.photo_set.all() is empty.
>
> Karen
>
> > File "/usr/lib/python2.5/site-packages/django/db/models/query.py" in
> > __getitem__
> > 157. return list(self._clone(_offset=k,
> > _limit=1))[0]
>
> > Exception Type: IndexError at /users/jonathan/
> > Exception Value: list index out of range
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