Has anyone successfully used django-concurrency?

[ia...@me.com]

Hey everyone,

One last try. I've given up on django-locking, and am now trying django-concurrency because it's more modern and more likely to work on Django 1.6.8's admin interface.

The documentation is very basic and doesn't actually give any examples, so I'm not sure if I've missed something, but I'm getting this exception when I modify my ConfigurationAdmin class to inherit from ConcurrentModelAdmin as the documentation discusses.

class ConfigurationAdmin(ConcurrentModelAdmin):

    form = forms.ConfigurationForm
    change_list_template = 'admin/configuration/change_list.html'

    ...

Internal Server Error: /test/common/configuration/
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 137, in get_response
    response = response.render()
  File "/usr/local/lib/python2.7/dist-packages/django/template/response.py", line 105, in render
    self.content = self.rendered_content
  File "/usr/local/lib/python2.7/dist-packages/django/template/response.py", line 82, in rendered_content
    content = template.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 140, in render
    return self._render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/test/utils.py", line 85, in instrumented_test_render
    return self.nodelist.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 840, in render
    bit = self.render_node(node, context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 78, in render_node
    return node.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 123, in render
    return compiled_parent._render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/test/utils.py", line 85, in instrumented_test_render
    return self.nodelist.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 840, in render
    bit = self.render_node(node, context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 78, in render_node
    return node.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 123, in render
    return compiled_parent._render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/test/utils.py", line 85, in instrumented_test_render
    return self.nodelist.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 840, in render
    bit = self.render_node(node, context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 78, in render_node
    return node.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 123, in render
    return compiled_parent._render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/test/utils.py", line 85, in instrumented_test_render
    return self.nodelist.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 840, in render
    bit = self.render_node(node, context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 78, in render_node
    return node.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 62, in render
    result = block.nodelist.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 840, in render
    bit = self.render_node(node, context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 78, in render_node
    return node.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 62, in render
    result = block.nodelist.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 840, in render
    bit = self.render_node(node, context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 78, in render_node
    return node.render(context)
  File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 1196, in render
    _dict = func(*resolved_args, **resolved_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/templatetags/admin_list.py", line 288, in result_list
    'results': list(results(cl))}
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/templatetags/admin_list.py", line 266, in results
    yield ResultList(None, items_for_result(cl, res, None))
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/templatetags/admin_list.py", line 258, in __init__
    super(ResultList, self).__init__(*items)
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/templatetags/admin_list.py", line 185, in items_for_result
    f, attr, value = lookup_field(field_name, result, cl.model_admin)
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/util.py", line 254, in lookup_field
    value = attr(obj)
  File "/usr/local/lib/python2.7/dist-packages/concurrency/admin.py", line 37, in action_checkbox
    get_revision_of_object(obj))))
  File "/usr/local/lib/python2.7/dist-packages/concurrency/api.py", line 23, in get_revision_of_object
    return getattr(obj, get_version_fieldname(obj))
  File "/usr/local/lib/python2.7/dist-packages/concurrency/core.py", line 22, in get_version_fieldname
    return obj._concurrencymeta._field.attname
AttributeError: 'Configuration' object has no attribute '_concurrencymeta'
[21/Nov/2014 20:29:51] "GET /test/common/configuration/ HTTP/1.1" 500 368613

I also changed {{ obj.pk }} to {{ obj|identity }} in delete_selected_confirmation.html as directed in the documentation.

Does anyone know how to set this project up? Any help at all would be greatly appreciated.

Thanks!

Ian

[Collin Anderson]

Hi Ian,

You may want to try opening an issue on django-consurrency showing the error you're getting.

https://github.com/saxix/django-concurrency/issues

Thanks,

Collin