#11079 closed Bug (fixed)
Multi-table inheritance subclasses cannot be proxied
Reported by: | George Song | Owned by: | nobody |
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Component: | Database layer (models, ORM) | Version: | 1.0 |
Severity: | Normal | Keywords: | model proxy multi-table inheritance |
Cc: | Triage Stage: | Accepted | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description
Creating a proxy model for a multi-table inherited subclass fails.
class Place(models.Model): name = models.CharField(max_length=50) class Restaurant(Place): genre = models.CharField(max_length=50) class PizzaJoint(Restaurant): class Meta: proxy = True >>> from proxy.models import Restaurant, PizzaJoint >>> Restaurant.objects.create(name='Greasy Pizza', genre='pizza') <Restaurant: Restaurant object> >>> Restaurant.objects.all() [<Restaurant: Restaurant object>] >>> PizzaJoint.objects.all() []
Also when accessing admin/proxy/pizzajoint/
, you get the following stack trace:
Template error: In template e:\lehrhaus\django\django\contrib\admin\templates\admin\change_list.html, error at line 78 Caught an exception while rendering: 'NoneType' object has no attribute 'column' 68 : {% endif %} 69 : {% endblock %} 70 : 71 : <form action="" method="post"{% if cl.formset.is_multipart %} enctype="multipart/form-data"{% endif %}> 72 : {% if cl.formset %} 73 : {{ cl.formset.management_form }} 74 : {% endif %} 75 : 76 : {% block result_list %} 77 : {% if action_form and actions_on_top and cl.full_result_count %}{% admin_actions %}{% endif %} 78 : {% result_list cl %} 79 : {% if action_form and actions_on_bottom and cl.full_result_count %}{% admin_actions %}{% endif %} 80 : {% endblock %} 81 : {% block pagination %}{% pagination cl %}{% endblock %} 82 : </form> 83 : </div> 84 : </div> 85 : {% endblock %} 86 : Traceback: File "E:\lehrhaus\django\django\core\handlers\base.py" in get_response 92. response = callback(request, *callback_args, **callback_kwargs) File "E:\lehrhaus\django\django\contrib\admin\options.py" in wrapper 226. return self.admin_site.admin_view(view)(*args, **kwargs) File "E:\lehrhaus\django\django\contrib\admin\sites.py" in inner 184. return view(request, *args, **kwargs) File "E:\lehrhaus\django\django\contrib\admin\options.py" in changelist_view 984. ], context, context_instance=template.RequestContext(request)) File "E:\lehrhaus\django\django\shortcuts\__init__.py" in render_to_response 20. return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs) File "E:\lehrhaus\django\django\template\loader.py" in render_to_string 108. return t.render(context_instance) File "E:\lehrhaus\django\django\template\__init__.py" in render 178. return self.nodelist.render(context) File "E:\lehrhaus\django\django\template\__init__.py" in render 779. bits.append(self.render_node(node, context)) File "E:\lehrhaus\django\django\template\debug.py" in render_node 71. result = node.render(context) File "E:\lehrhaus\django\django\template\loader_tags.py" in render 97. return compiled_parent.render(context) File "E:\lehrhaus\django\django\template\__init__.py" in render 178. return self.nodelist.render(context) File "E:\lehrhaus\django\django\template\__init__.py" in render 779. bits.append(self.render_node(node, context)) File "E:\lehrhaus\django\django\template\debug.py" in render_node 71. result = node.render(context) File "E:\lehrhaus\django\django\template\loader_tags.py" in render 97. return compiled_parent.render(context) File "E:\lehrhaus\django\django\template\__init__.py" in render 178. return self.nodelist.render(context) File "E:\lehrhaus\django\django\template\__init__.py" in render 779. bits.append(self.render_node(node, context)) File "E:\lehrhaus\django\django\template\debug.py" in render_node 71. result = node.render(context) File "E:\lehrhaus\django\django\template\loader_tags.py" in render 24. result = self.nodelist.render(context) File "E:\lehrhaus\django\django\template\__init__.py" in render 779. bits.append(self.render_node(node, context)) File "E:\lehrhaus\django\django\template\debug.py" in render_node 71. result = node.render(context) File "E:\lehrhaus\django\django\template\loader_tags.py" in render 24. result = self.nodelist.render(context) File "E:\lehrhaus\django\django\template\__init__.py" in render 779. bits.append(self.render_node(node, context)) File "E:\lehrhaus\django\django\template\debug.py" in render_node 81. raise wrapped Exception Type: TemplateSyntaxError at /admin/proxy/pizzajoint/ Exception Value: Caught an exception while rendering: 'NoneType' object has no attribute 'column' Original Traceback (most recent call last): File "E:\lehrhaus\django\django\template\debug.py", line 71, in render_node result = node.render(context) File "E:\lehrhaus\django\django\template\__init__.py", line 936, in render dict = func(*args) File "E:\lehrhaus\django\django\contrib\admin\templatetags\admin_list.py", line 251, in result_list return {'cl': cl, File "E:\lehrhaus\django\django\contrib\admin\templatetags\admin_list.py", line 247, in results for res in cl.result_list: File "E:\lehrhaus\django\django\db\models\query.py", line 93, in _result_iter self._fill_cache() File "E:\lehrhaus\django\django\db\models\query.py", line 660, in _fill_cache self._result_cache.append(self._iter.next()) File "E:\lehrhaus\django\django\db\models\query.py", line 207, in iterator for row in self.query.results_iter(): File "E:\lehrhaus\django\django\db\models\sql\query.py", line 287, in results_iter for rows in self.execute_sql(MULTI): File "E:\lehrhaus\django\django\db\models\sql\query.py", line 2336, in execute_sql sql, params = self.as_sql() File "E:\lehrhaus\django\django\db\models\sql\query.py", line 395, in as_sql self.pre_sql_setup() File "E:\lehrhaus\django\django\db\models\sql\query.py", line 587, in pre_sql_setup self.setup_inherited_models() File "E:\lehrhaus\django\django\db\models\sql\query.py", line 1311, in setup_inherited_models seen[model] = self.join((root_alias, model._meta.db_table, AttributeError: 'NoneType' object has no attribute 'column'
Change History (7)
comment:1 by , 15 years ago
Summary: | Multi-table inheritance subclassed cannot be proxied → Multi-table inheritance subclasses cannot be proxied |
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comment:2 by , 15 years ago
Triage Stage: | Unreviewed → Accepted |
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comment:3 by , 13 years ago
Severity: | → Normal |
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Type: | → Bug |
comment:4 by , 13 years ago
UI/UX: | unset |
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comment:6 by , 13 years ago
Resolution: | → fixed |
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Status: | new → closed |
Version: | SVN → 1.3 |
Cannot reproduce on django 1.4
>>> import django >>> django.VERSION (1, 4, 0, 'final', 0) >>> from ticket_11079.models import Restaurant, PizzaJoint >>> Restaurant.objects.create(name='Greasy Pizza', genre='pizza') <Restaurant: Restaurant object> >>> Restaurant.objects.all() [<Restaurant: Restaurant object>] >>> PizzaJoint.objects.all() [<PizzaJoint: PizzaJoint object>]
django 1.3.1
>>> import django >>> django.VERSION (1, 3, 1, 'final', 0) >>> from ticket_11079.models import Restaurant, PizzaJoint >>> Restaurant.objects.create(name='Greasy Pizza', genre='pizza') <Restaurant: Restaurant object> >>> Restaurant.objects.all() [<Restaurant: Restaurant object>] >>> PizzaJoint.objects.all() [<PizzaJoint: PizzaJoint object>]
And django 1.2.7
>>> import django >>> django.VERSION (1, 2, 7, 'final', 0) >>> from ticket_11079.models import Restaurant, PizzaJoint >>> Restaurant.objects.create(name='Greasy Pizza', genre='pizza') <Restaurant: Restaurant object> >>> Restaurant.objects.all() [<Restaurant: Restaurant object>] >>> PizzaJoint.objects.all() [<PizzaJoint: PizzaJoint object>]
At the time this ticket was created (05/12/09) django 1.1 was not even released. I cannot find which commit fixed this issue but since it has been fixed in trunk for about 3 years I'm marking this ticket as fixed.
comment:7 by , 13 years ago
Version: | 1.3 → 1.0 |
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Change UI/UX from NULL to False.