Empty table causes runtime failure

[mietek]

An empty table can be viewed via /admin/${TABLE_NAME}view, but not via /${TABLE_NAME}s, as there is a runtime failure:

Traceback (most recent call last):
  File "/app/.heroku/python/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 131, in handle_request
    respiter = self.wsgi(environ, resp.start_response)
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/app/.heroku/python/lib/python2.7/site-packages/werkzeug/contrib/fixers.py", line 144, in __call__
    return self.app(environ, start_response)
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app

_dispatch_request()
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/app/.heroku/python/lib/python2.7/site-packages/sandman/decorators.py", line 27, in wrapped
    rv = f(*args, **kwargs)
  File "/app/.heroku/python/lib/python2.7/site-packages/sandman/sandman.py", line 493, in get_collection
    return collection_response(resources, start, stop)
  File "/app/.heroku/python/lib/python2.7/site-packages/sandman/sandman.py", line 279, in collection_response
    return _collection_html_response(resources, start, stop)
  File "/app/.heroku/python/lib/python2.7/site-packages/sandman/sandman.py", line 149, in _collection_html_response
    resources=resources[start:stop]))
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/templating.py", line 128, in render_template
    context, ctx.app)
  File "/app/.heroku/python/lib/python2.7/site-packages/flask/templating.py", line 110, in _render
    rv = template.render(context)
  File "/app/.heroku/python/lib/python2.7/site-packages/jinja2/environment.py", line 969, in render
    return self.environment.handle_exception(exc_info, True)
  File "/app/.heroku/python/lib/python2.7/site-packages/jinja2/environment.py", line 742, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/app/.heroku/python/lib/python2.7/site-packages/sandman/templates/collection.html", line 1, in top-level template code
    {% extends "base.html" %}
  File "/app/.heroku/python/lib/python2.7/site-packages/sandman/templates/base.html", line 21, in top-level template code
    {% block content %}
  File "/app/.heroku/python/lib/python2.7/site-packages/sandman/templates/collection.html", line 5, in block "content"
    <h2>{{ resources[0].__tablename__ }}</h2>
  File "/app/.heroku/python/lib/python2.7/site-packages/jinja2/environment.py", line 401, in getattr
    return obj[attribute]
UndefinedError: list object has no element 0