Make it possible to skip logging before the actual call #2745
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## master #2745 +/- ##
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Coverage 56.69% 56.70%
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Files 602 602
Lines 43971 43980 +9
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+ Hits 24931 24937 +6
- Misses 19040 19043 +3 ☔ View full report in Codecov by Sentry. |
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| @@ -179,6 +182,10 @@ def get_username(request): | |||
| if not request: | |||
| return None | |||
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| if settings.DEBUG or check_log_level(_logger, logging.DEBUG): | |||
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Is this extra function really necessary? I find the following to be just as clear:
| if settings.DEBUG or check_log_level(_logger, logging.DEBUG): | |
| if settings.DEBUG or _logger.getEffectiveLevel() <= logging.DEBUG: |
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The function makes for slightly easier branch testing if one is fond of mocks and patches. Also it might prevent someone from prettifying getEffectiveLevel() to level or what it was, which does not do what one thinks it does.
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settings.DEBUG is probably not even necessary since that doesn't flip debug-logging magically on.
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Well, this jogged my memory, and I recall NAV already has multiple examples of the (to me) even more legible pattern:
| if settings.DEBUG or check_log_level(_logger, logging.DEBUG): | |
| if settings.DEBUG or _logger.isEnabledFor(logging.DEBUG): |
I needed more logging and also found a way to scratch a very scratchy itch that has bothered me for years. Maybe it should have been two PRs. |
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| def check_log_level(logger, loglevel): | ||
| """ | ||
| Check that the level of the logger is equal to or below loglevel | ||
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| Use before possibly expensive logging operations, like calling logging in | ||
| a loop or building an expensive object that will be logged and thrown away. | ||
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| Avoid this classic mistake: | ||
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| logger.info("%s", expensive_function()) | ||
| """ | ||
| level = logger.getEffectiveLevel() | ||
| return level <= loglevel |
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Referring back to my previous review comments: Why do we need this at all? Why not just use logger.isEnabledFor(loglevel) ?
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Co-authored-by: Morten Brekkevold <[email protected]>
Not particularly needed for where it is used in auth.remote_user but my sense of aesthetics was deeply offended by running a loop for no reason (if loglevel higher than DEBUG) and I wanted a general fix.