Exception/tracebacks when loading frontend/index.html template

[ssciolla]

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Expected behavior (A description of what you expected to happen) :

We shouldn't be regularly seeing exceptions and tracebacks in the logs.

Describe the bug (Tell us what happens instead of the expected behavior) :

There seems to be some exception and tracebacks logged at the DEBUG level when trying to load the frontend/index.html template.

[base.py:867] Exception while resolving variable 'content' in template 'frontend/index.html'.
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 828, in _resolve_lookup
     current = current[bit]
TypeError: 'NoneType' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 836, in _resolve_lookup
    current = getattr(current, bit)
AttributeError: 'NoneType' object has no attribute 'content'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 842, in _resolve_lookup
    current = current[int(bit)]
ValueError: invalid literal for int() with base 10: 'content'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 847, in _resolve_lookup
   raise VariableDoesNotExist("Failed lookup for key "
django.template.base.VariableDoesNotExist: Failed lookup for key [content] in None

Steps to Reproduce :

1. Monitor the logs when the application is initially loading in a browser.

[jennlove-um]

Zhen will verify whether this is still an issue.

[jonespm]

This is still an issue, this is just a problem locally when flatpages content isn't set

[zqian]

Tested on MyLA test instance where debug mode is on:

• Removed the content of /copyright/ flat page
• checked the log file and found no occurrence of above stack trace.
• Added the content back in /copyright/ flat page