Django Error "ValueError: Expected Table object, but didn't find one."

最后一行代码显示错误“ValueError: Expected Table object, but didn't find one.”，但实际的错误是在traceback的开头，在views.py里面.

这是因为在html中，加了新的代码，需要一个table对象，但原来的views.py中的render_to_response()没有加新的对象，返回足够的对象，这样导致page渲染失败。改进方法：

return render_to_response(
        "lava_scheduler_app/health_jobs.html",
        {
            'device': device,
            'health_job_table': HealthJobTable(
                'health_jobs', reverse(health_jobs_json, kwargs=dict(pk=pk))),
            'show_maintenance': device.can_admin(request.user) and \
                device.status in [Device.IDLE, Device.RUNNING],
            'show_online': device.can_admin(request.user) and \
                device.status in [Device.OFFLINE, Device.OFFLINING],
            'bread_crumb_trail': BreadCrumbTrail.leading_to(health_job_list, pk=pk),
        },
        RequestContext(request))

->

return render_to_response(
        "lava_scheduler_app/health_jobs.html",
        {
            'device': device,
            'transition_table': DeviceTransitionTable(
                'transitions', reverse(transition_json, kwargs=dict(pk=device.pk))),
            'health_job_table': HealthJobTable(
                'health_jobs', reverse(health_jobs_json, kwargs=dict(pk=pk))),
            'show_maintenance': device.can_admin(request.user) and \
                device.status in [Device.IDLE, Device.RUNNING],
            'show_online': device.can_admin(request.user) and \
                device.status in [Device.OFFLINE, Device.OFFLINING],
            'bread_crumb_trail': BreadCrumbTrail.leading_to(health_job_list, pk=pk),
        },
        RequestContext(request))

Error message:

WARNING:root:This instance will not use sentry as SENTRY_DSN is not configured
WARNING:root:dataview-specific database connection not available, dataview query is NOT sandboxed
/srv/lava/instances/lab/lib/python2.6/site-packages/django_tables2/columns.py:82: DeprecationWarning: attrs must be Attrs object, not dict
  % attrs.__class__.__name__, DeprecationWarning)
/srv/lava/instances/lab/lib/python2.6/site-packages/django/contrib/csrf/middleware.py:6: DeprecationWarning: This import for CSRF functionality is deprecated.  Please use django.middleware.csrf for the middleware and django.views.decorators.csrf for decorators.
  DeprecationWarning
/srv/lava/instances/lab/lib/python2.6/site-packages/django/core/context_processors.py:27: DeprecationWarning: The context processor at `django.core.context_processors.auth` is deprecated; use the path `django.contrib.auth.context_processors.auth` instead.
  DeprecationWarning
ERROR:django.request:Internal Server Error: /scheduler/labhealth/device/mx53loco01
Traceback (most recent call last):
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/core/handlers/base.py", line 111, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/srv/lava/instances/lab/src/lava-scheduler/lava_scheduler_app/views.py", line 221, in health_job_list
    RequestContext(request))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/shortcuts/__init__.py", line 20, in render_to_response
    return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader.py", line 188, in render_to_string
    return t.render(context_instance)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 123, in render
    return self._render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 117, in _render
    return self.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader_tags.py", line 127, in render
    return compiled_parent._render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 117, in _render
    return self.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader_tags.py", line 127, in render
    return compiled_parent._render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 117, in _render
    return self.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader_tags.py", line 127, in render
    return compiled_parent._render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 117, in _render
    return self.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader_tags.py", line 127, in render
    return compiled_parent._render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 117, in _render
    return self.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader_tags.py", line 64, in render
    result = block.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/defaulttags.py", line 394, in render
    return strip_spaces_between_tags(self.nodelist.render(context).strip())
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader_tags.py", line 64, in render
    result = block.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader_tags.py", line 64, in render
    result = block.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/loader_tags.py", line 64, in render
    result = block.nodelist.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 744, in render
    bits.append(self.render_node(node, context))
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django/template/base.py", line 757, in render_node
    return node.render(context)
  File "/srv/lava/instances/lab/lib/python2.6/site-packages/django_tables2/templatetags/django_tables2.py", line 152, in render
    raise ValueError("Expected Table object, but didn't find one.")
ValueError: Expected Table object, but didn't find one