Problems extend change_form.html in django admin

This is caused most likely because you have a {% url %} tag that is trying to link to the app_list. It could be in your admin/form_change.html or in some other included/extended template.

This is usually caused by context that is not passed correctly such as if you have a tag that looks like {% url 'app_list' %} or {% url 'app_list' var %} and the var is empty.

change_form.html contains the following url tag:

{% url 'admin:app_list' app_label=opts.app_label %}

So you should pass the opts variable to the template context:

data = {'test': 'test',
        'opts': MyModel._meta}

UPDATE: The change_form.html template uses the {% submit_row %} template tag which requires some other context variables so the data dictionary should be like this:

data = {'test': 'test',
        'opts': MyModel._meta,    
        'change': True,
        'is_popup': False,
        'save_as': False,
        'has_delete_permission': False,
        'has_add_permission': False,
        'has_change_permission': False}