id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
1608	When using a non existent field as part of a models representation django throws a TemplateSyntaxError	info@…	Adrian Holovaty	"Using this model:

class Product(meta.Model):
    travelCode = meta.CharField('Reiscode', maxlength=7, primary_key=True)

class Unit(meta.Model):
    travelCode = meta.ForeignKey(Product)

    def __repr__(self):
        return ""%s %s"" % (self.get_travelCode(), self.nonexistentfield)

    class META:
        admin = meta.Admin()

Displaying Unit in the admin interface works for the Unit overview, even though self.nonexistentfield does not exist. When one selects an entry for editting, Django throws the following TemplateSyntaxError:

------------------
Traceback (most recent call last):

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/servers/basehttp.py"", line 272, in run
    self.result = application(self.environ, self.start_response)

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/servers/basehttp.py"", line 615, in __call__
    return self.application(environ, start_response)

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/handlers/wsgi.py"", line 155, in __call__
    response = self.get_response(request.path, request)

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/handlers/base.py"", line 109, in get_response
    return self.get_technical_error_response(request)

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/handlers/base.py"", line 139, in get_technical_error_response
    return debug.technical_500_response(request, *sys.exc_info())

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/views/debug.py"", line 126, in technical_500_response
    return HttpResponseServerError(t.render(c), mimetype='text/html')

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/template/__init__.py"", line 146, in render
    return self.nodelist.render(context)

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/template/__init__.py"", line 707, in render
    bits.append(self.render_node(node, context))

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/template/__init__.py"", line 725, in render_node
    result = node.render(context)

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/template/defaulttags.py"", line 112, in render
    nodelist.append(node.render(context))

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/template/defaulttags.py"", line 179, in render
    return self.nodelist_true.render(context)

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/template/__init__.py"", line 707, in render
    bits.append(self.render_node(node, context))

  File ""/usr/lib/python2.4/site-packages/Django-0.91-py2.4.egg/django/core/template/__init__.py"", line 735, in render_node
    raise wrapped

TemplateSyntaxError: Caught an exception while rendering.
------------------

On the front end a similar error is thrown when one tries to use the model object's representation. The error is especially unclear because it refers to a Template error while this essentially is a model error. A model exception stating that the model does not contain such a field would be nicer.
"	defect	new	Core (Other)	0.91	normal				Unreviewed	0	0	0	0	0	0