FormAlchemy/pyramid_formalchemy — Issue #19: `resources.Base.get_instance` returns an `i18n.I18NModel`.
Author: thruflo
Created: 2012-01-30 17:45:05+00:00
State: open

Hi,

I get the following error trying to view a model I've created through fa.bootstrap's pyramid_formalchemy UI. `request.model_class` is an `i18n.I18NModel` instance, which causes `get_instance` to bork, as it should be trying to query the `i18n.I18NModel` instance's `context`.

Thanks,

James.

```
Traceback (most recent call last):
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid_debugtoolbar-0.9.8-py2.6.egg/pyramid_debugtoolbar/toolbar.py", line 115, in toolbar_tween
response = _handler(request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid_debugtoolbar-0.9.8-py2.6.egg/pyramid_debugtoolbar/panels/performance.py", line 55, in resource_timer_handler
result = handler(request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid-1.3a6-py2.6.egg/pyramid/tweens.py", line 20, in excview_tween
response = handler(request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid_tm-0.3-py2.6.egg/pyramid_tm/__init__.py", line 61, in tm_tween
response = handler(request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid-1.3a6-py2.6.egg/pyramid/router.py", line 164, in handle_request
response = view_callable(context, request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid-1.3a6-py2.6.egg/pyramid/config/views.py", line 564, in __call__
return view(context, request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid-1.3a6-py2.6.egg/pyramid/config/views.py", line 290, in attr_view
return view(context, request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid-1.3a6-py2.6.egg/pyramid/config/views.py", line 263, in predicate_wrapper
return view(context, request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid-1.3a6-py2.6.egg/pyramid/config/views.py", line 316, in rendered_view
result = view(context, request)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid-1.3a6-py2.6.egg/pyramid/config/views.py", line 416, in _class_view
response = getattr(inst, attr)()
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid_formalchemy-0.4.3-py2.6.egg/pyramid_formalchemy/actions.py", line 77, in wrapped
return func(self, *args, **kwargs)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid_formalchemy-0.4.3-py2.6.egg/pyramid_formalchemy/views.py", line 348, in show
return self.render(fs=fs, id=id)
File "/Users/thruflo/Development/sandbox/bootstrap/bootstrap/forms.py", line 19, in render
result = super(ModelView, self).render(**kwargs)
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid_formalchemy-0.4.3-py2.6.egg/pyramid_formalchemy/views.py", line 175, in render
breadcrumb=self.breadcrumb(**kwargs),
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid_formalchemy-0.4.3-py2.6.egg/pyramid_formalchemy/views.py", line 146, in breadcrumb
items.append((request.fa_url(model_name, id), u'%s' % self.context.get_instance(), 'instance_url'))
File "/Users/thruflo/Development/sandbox/fa/lib/python2.6/site-packages/pyramid_formalchemy-0.4.3-py2.6.egg/pyramid_formalchemy/resources.py", line 76, in get_instance
return session.query(model).get(self.request.model_id)
File "build/bdist.macosx-10.6-universal/egg/sqlalchemy/orm/session.py", line 979, in query
return self._query_cls(entities, self, **kwargs)
File "build/bdist.macosx-10.6-universal/egg/sqlalchemy/orm/query.py", line 107, in __init__
self._set_entities(entities)
File "build/bdist.macosx-10.6-universal/egg/sqlalchemy/orm/query.py", line 114, in _set_entities
entity_wrapper(self, ent)
File "build/bdist.macosx-10.6-universal/egg/sqlalchemy/orm/query.py", line 3117, in __init__
"expected - got '%r'" % (column, )
InvalidRequestError: SQL expression, column, or mapped entity expected - got ''
```