#10151: url tag causes TypeError: dict objects are unhashable
---------------------------+------------------------------------------------
Reporter: pclerie | Owner: nobody
Status: new | Milestone:
Component: Uncategorized | Version: 1.0
Keywords: | Stage: Unreviewed
Has_patch: 0 |
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I'm trying out the examples in Practical Django Projects. When using named
views with the url tag I get a TypeError: dict objects are unhashable (see
the traceback below). The interesting thing is that it only happens
_once_, the first time through. On following passes no problem occurs. I
have reproduced the same behaviour with django.core.urlresolvers.reverse.
It seems I can work around this by putting a call to reverse in a
try...except block in an {{{__init__.py.}}} That forces the first error
and then no more problems.
Thanks
Philippe
=================
Traceback follows:
{{{
Environment:
Request Method: GET
Request URL: http://denebola.logisys.ht:8000/blog/
Django Version: 1.0.2 final
Python Version: 2.5.2
Installed Applications:
['django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.admin',
'django.contrib.flatpages',
'coltrane',
'tagging']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware')
Template error:
In template /home/philippe/prj/django/templates/base.html, error at line
33
Caught an exception while rendering: dict objects are unhashable
23 :
24 : <div id="header">
25 : <div id="logo">
26 : </div>
27 : <h1>L'iconoclaste</h1>
28 : <h5>Élucubrations d'un étranger chez lui.</h5>
29 : </div>
30 :
31 : <div id="menu">
32 : <ul>
33 : <li><a href=" {% url coltrane_entry_archive_index %}
">Accueil</a>
34 : {% block menu %}
35 : {% endblock %}
36 : </ul>
37 : </div>
38 :
39 : <div id="main">
40 : <div id="leftcol">
41 : <div id="navigation">
42 : <h4>Navigation</h4>
43 : <ul>
Traceback:
File "/var/lib/python-support/python2.5/django/core/handlers/base.py" in
get_response
86. response = callback(request, *callback_args,
**callback_kwargs)
File "/var/lib/python-
support/python2.5/django/views/generic/date_based.py" in archive_index
49. return HttpResponse(t.render(c), mimetype=mimetype)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in
render
176. return self.nodelist.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in
render
768. bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in
render_node
71. result = node.render(context)
File "/var/lib/python-support/python2.5/django/template/loader_tags.py" in
render
97. return compiled_parent.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in
render
176. return self.nodelist.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in
render
768. bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in
render_node
71. result = node.render(context)
File "/var/lib/python-support/python2.5/django/template/loader_tags.py" in
render
97. return compiled_parent.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in
render
176. return self.nodelist.render(context)
File "/var/lib/python-support/python2.5/django/template/__init__.py" in
render
768. bits.append(self.render_node(node, context))
File "/var/lib/python-support/python2.5/django/template/debug.py" in
render_node
81. raise wrapped
Exception Type: TemplateSyntaxError at /blog/
Exception Value: Caught an exception while rendering: dict objects are
unhashable
Original Traceback (most recent call last):
File "/var/lib/python-support/python2.5/django/template/debug.py", line
71, in render_node
result = node.render(context)
File "/var/lib/python-support/python2.5/django/template/defaulttags.py",
line 373, in render
url = reverse(self.view_name, args=args, kwargs=kwargs)
File "/var/lib/python-support/python2.5/django/core/urlresolvers.py",
line 254, in reverse
*args, **kwargs)))
File "/var/lib/python-support/python2.5/django/core/urlresolvers.py",
line 227, in reverse
possibilities = self.reverse_dict.getlist(lookup_view)
File "/var/lib/python-support/python2.5/django/core/urlresolvers.py",
line 161, in _get_reverse_dict
for name in pattern.reverse_dict:
File "/var/lib/python-support/python2.5/django/core/urlresolvers.py",
line 169, in _get_reverse_dict
self._reverse_dict.appendlist(pattern.callback, (bits, p_pattern))
File "/var/lib/python-support/python2.5/django/core/urlresolvers.py",
line 130, in _get_callback
self._callback = get_callable(self._callback_str)
File "/var/lib/python-support/python2.5/django/utils/functional.py",
line 128, in wrapper
if mem_args in cache:
TypeError: dict objects are unhashable
}}}
--
Ticket URL: <http://code.djangoproject.com/ticket/10151>
Django <http://code.djangoproject.com/>
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