def document(self, *args, **kwargs):
"""Render the error document"""
# Merge the user into the current DBSession
# to prevent DetachedInstanceError
if request.identity is not None:
request.identity['user'] = DBSession.merge(request.identity['user'])
resp = request.environ.get('pylons.original_response')
if resp is None:
raise HTTPNotFound
default_message = ("<p>We're sorry but we weren't able to process "
" this request.</p>")
values = dict(prefix=request.environ.get('SCRIPT_NAME', ''),
code=request.params.get('code', resp.status_int),
message=request.params.get('message', default_message))
return values
