After upgrading our edx-platform fork to the Olive version, our test environment was no longer able to load the lms frontend application, reporting errors saying:
AttributeError: ‘HiddenDescriptorWithMixins’ object has no attribute ‘grading_policy’
Seeing that the error was related to grades I attempted running the compute_grades command in case missing data was the root cause. However, that also failed with the error:
AttributeError: ‘HiddenDescriptorWithMixins’ object has no attribute ‘id’
In the end, @dave helped me fix this error by repackaging edx-platform with
sudo python3 setup.py develop
In my understanding, this was necessary because packages that had previously been managed as submodules (such as xmodule) were folded into edx-platform’s setup.py configuration as part of the olive upgrade. The submodules disappeared and their xblocks were now declared as part of the edx-platform package, but the stale version of edx-platform being included image did not yet include those xblock definitions.
First building edx-platform and then building the openedx image with tutor images build openedx enabled the system to recognize the xblocks and thereby no longer fallback to the default HiddenDescriptor block structure.