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PONoReverseMatch at /admin/app/model/ - Admin change_list.html
 

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  1. PONoReverseMatch at /admin/app/model/ - Admin change_list.html
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    <p>I don't know why I get this error while trying to reach the admin <code>change_list</code> page of the <code>mymodel</code> model:</p> <pre><code>NoReverseMatch at /admin/myapp/mymodel/ Reverse for 'myapp_mymodel_change' with arguments '(u'',)' and keyword arguments '{}' not found. Error during template rendering In template /usr/local/lib/python2.7/dist-packages/django/contrib/admin/templates/admin/change_list.html, error at line 91 84 &lt;form id="changelist-form" action="" method="post"{% if cl.formset.is_multipart %} enctype="multipart/form-data"{% endif %}&gt;{% csrf_token %} 85 {% if cl.formset %} 86 &lt;div&gt;{{ cl.formset.management_form }}&lt;/div&gt; 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 &lt;/form&gt; </code></pre> <p>The error does not occur on my local runserver(Python 2.7.5, Django 1.5.1), only when deployed on my remote server (Python 2.7.2+, Django 1.5.1). Interestingly enough, only one specific model is affected by this -- I can reach the <code>change_list</code> pages of all the other models without any problems whatsoever. The rest of the admin area works fine as well.</p> <p>The answers to similar questions regarding the <code>NoReverseMatch</code> error didn't help much because it happens in the admin, not my own code. Does anyone know where to start looking?</p> <p><strong>EDIT:</strong></p> <p>I had some customised <code>list_display</code> fields which I now commented out for testing. They seemed to be responsible for the <code>NoReverseMatch</code> error. Now I got another error instead: </p> <pre><code>AttributeError at /admin/myapp/mymodel/ 'NoneType' object has no attribute '_meta' </code></pre> <p>I then stripped away everything that isn't necessary. This is now my complete <code>admin.py</code>:</p> <pre><code>from django.contrib import admin from myproject.myapp.models import * class MymodelAdmin(admin.ModelAdmin): list_display = ['email', 'user', 'is_active', 'first_used'] date_hierarchy = 'first_used' ordering = ['-first_used'] list_filter = ['is_active', 'first_used', 'user'] admin.site.register(Mymodel, MymodelAdmin) </code></pre> <p>And on my local machine it still works perfectly.</p>
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