I had a strange problem, at least for python / django noob is strange;)
django.core.urlresolvers.reverse () raises the NoneType object cannot be called when called from my models.py . When I execute the same line from the shell, it works fine.
I have absolutely no idea why this is happening.
Shell:
$ from django.core.urlresolvers import reverse
$ reverse('images:view', args=[1])
'/images/1/'
models.py
from django.db import models
from django.core.urlresolvers import reverse
class Image(models.Model):
image = models.ImageField(upload_to='images')
image_caption = models.CharField(max_length=80, verbose_name='Caption')
uploaded_at = models.DateTimeField(auto_now_add=True, verbose_name='Date Uploaded')
modified_at = models.DateTimeField(auto_now=True, verbose_name='Date Modified')
def __str__(self):
return self.image_caption
def edit_image(self):
return '<a href="%s">Edit</a>' % reverse('images:view', args=[self.id])
edit_image.short_description = 'Edit Image'
edit_image.allow_tags = True
admin.py refrencing edit_imagehere
from django.contrib import admin
from images.models import Image
class ImageAdmin(admin.ModelAdmin):
search_fields = ['image_caption']
list_display = ['id', 'image_caption', 'edit_image']
admin.site.register(Image, ImageAdmin)
url I'm trying to change the image namespace
url(r'^(?P<pk>\d+)/$', views.DetailView.as_view(), name='view'),
What have i tried?
- reverse_lazy () instead of reverse ()
- kwargs instead of arg
- and things that I don’t even know correctly .: P
trace of TRACEBACK calls
Template error:
In template /home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/contrib/admin/templates/admin/change_list.html, error at line 91
'NoneType' object is not callable
81 : {% endif %}
82 : {% endblock %}
83 :
84 : <form id="changelist-form" action="" method="post"{% if cl.formset.is_multipart %} enctype="multipart/form-data"{% endif %}>{% csrf_token %}
85 : {% if cl.formset %}
86 : <div>{{ cl.formset.management_form }}</div>
87 : {% endif %}
88 :
89 : {% block result_list %}
90 : {% if action_form and actions_on_top and cl.full_result_count %}{% admin_actions %}{% endif %}
91 : {% result_list cl %}
92 : {% if action_form and actions_on_bottom and cl.full_result_count %}{% admin_actions %}{% endif %}
93 : {% endblock %}
94 : {% block pagination %}{% pagination cl %}{% endblock %}
95 : </form>
96 : </div>
97 : </div>
98 : {% endblock %}
99 :
Traceback:
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/core/handlers/base.py" in get_response
139. response = response.render()
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/response.py" in render
105. self.content = self.rendered_content
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/response.py" in rendered_content
82. content = template.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in render
140. return self._render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in _render
134. return self.nodelist.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in render
840. bit = self.render_node(node, context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/debug.py" in render_node
78. return node.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/loader_tags.py" in render
123. return compiled_parent._render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in _render
134. return self.nodelist.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in render
840. bit = self.render_node(node, context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/debug.py" in render_node
78. return node.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/loader_tags.py" in render
123. return compiled_parent._render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in _render
134. return self.nodelist.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in render
840. bit = self.render_node(node, context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/debug.py" in render_node
78. return node.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/loader_tags.py" in render
62. result = block.nodelist.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in render
840. bit = self.render_node(node, context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/debug.py" in render_node
78. return node.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/loader_tags.py" in render
62. result = block.nodelist.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in render
840. bit = self.render_node(node, context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/debug.py" in render_node
78. return node.render(context)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/template/base.py" in render
1196. _dict = func(*resolved_args, **resolved_kwargs)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/contrib/admin/templatetags/admin_list.py" in result_list
288. 'results': list(results(cl))}
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/contrib/admin/templatetags/admin_list.py" in results
266. yield ResultList(None, items_for_result(cl, res, None))
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/contrib/admin/templatetags/admin_list.py" in __init__
258. super(ResultList, self).__init__(*items)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/contrib/admin/templatetags/admin_list.py" in items_for_result
185. f, attr, value = lookup_field(field_name, result, cl.model_admin)
File "/home/ankit/Desktop/Python/Workspace/VirtualEnv3.3.2/local/lib/python3.3/dist-packages/django/contrib/admin/util.py" in lookup_field
258. value = attr()
File "/home/ankit/Desktop/Python/Workspace/SnapShare/images/models.py" in edit_image
30. return '<a href="%s">Edit</a>' % reverse('images:view', args=[self.id])
Exception Type: TypeError at /admin/images/image/
Exception Value: 'NoneType' object is not callable
Python Version: 3.3.2
Django Version: 1.6.2
Thanks in advance:)