Scale-dependent slope fails

[pastewka]

This is for https://contact.engineering/go/867nv/

[mcrot]

I've also seen this for other functions. Duplicate of #737 .

[pastewka]

Now I get this:

There are two error emails (Wed, 20 Oct 2021 07:47:18 -0000 (20.10.2021 09:47:18) and Wed, 20 Oct 2021 07:47:19 -0000 (20.10.2021 09:47:19)) associated with this error.

They contain the following traceback:

Traceback (most recent call last):
  File "/opt/conda/lib/python3.7/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/opt/conda/lib/python3.7/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/opt/conda/lib/python3.7/contextlib.py", line 74, in inner
    return func(*args, **kwds)
  File "/opt/conda/lib/python3.7/site-packages/django/contrib/auth/decorators.py", line 21, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/app/topobank/analysis/views.py", line 117, in switch_card_view
    return view_class.as_view()(request)
  File "/opt/conda/lib/python3.7/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "/opt/conda/lib/python3.7/site-packages/django/views/generic/base.py", line 98, in dispatch
    return handler(request, *args, **kwargs)
  File "/app/topobank/analysis/views.py", line 333, in post
    response = super().get(request, *args, **kwargs)
  File "/opt/conda/lib/python3.7/site-packages/django/views/generic/base.py", line 159, in get
    context = self.get_context_data(**kwargs)
  File "/app/topobank/analysis/views.py", line 740, in get_context_data
    labels=subject_checkbox_groups[topography_ct],

[mcrot]

Ah yes, it's a KeyError. The key <ContentType: manager | topography> is missing. I think that's not related to the error message with memcached, but should be easy to fix.

[pastewka]

Is that a migration issue?

[mcrot]

No, I don't think so. There is a path in the code where a dictionary has not been set up properly.
More an issue of a missing test.

[pastewka]

Sounds good!

[pastewka]

For some surfaces the scale-dependent slope and curvature now shows correctly. Part of the problem may have simply been a memory issue on the server.

[mcrot]

Yes, I restarted all failed analyses yesterday. Another argument to switch to the new server with the next bugfix release.

[mcrot]

I confirm that the memcached errors don't occur if there is enough free memory.

[mcrot]

I've fixed the KeyError and close this with that commit.
The memcached error is also referenced by #737, which is still open.

[mcrot]

We should check whether the surface analyses fail if all underlying measurement analyses fail.
Those key errors are related to that case where there is a "successful" surface analysis, but later
no analyses are available for measurements. This special case is handled now.

[pastewka]

I'll create an issue on the SurfaceTopography side for this