Another small installment of my Web-Scraping series.
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Category: 1-second guide
Django TypeError: Cannot create a consistent method resolution order (MRO) for bases // 1-second guide
A small yet useful piece of information inside.
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Sorting QuerySet: Typerror ‘<' not supported between instances of 'NoneType' and 'str'
Just sort QuerySet with Django built-in methods, man.
Passing files to JavaScript
Very small shoutout – don’t try to make relative path work.
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Unclickable link // 1-second guide 🐺
Building a menu for staff members I encountered a need to keep the url on the page but make it temporarily unavailable.
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GenericView: Attributeerror ‘list’ object has no attribute ‘filter’ // 1-second guide 😮💢
So you are casually overriding get_queryset() in a, say, ListView, like this:
def get_queryset(self):
entries = [x for x in Entry.objects.all() if x.publications]
return entriesBecause you need to sort the Entry table by a reverse M2M relation publications and then BAM!:
Attribute error 'list' object has no attribute 'filter'Without a trace of the line you made a mistake in…
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Can’t run Django while PyCharm is updating indices // 1-second guide 😠
It is truly irritating when you code minding your business when Pycharm decides to look through thousands of static files in the project…
Read More »‘Run manage.py Task…’ action is not available while PyCharm is updating indices
Redis error 111 // 1 second guide 🥗
Suddenly my server went down with this error:
redis.exceptions.ConnectionError: Error 111 connecting to localhost:6379Read More »
Port is already in use // 1 second guide 🐝
Pycharm in particular likes fetching Django console spontaneously (while I’m copy-and-pasting things in project tree). After runserver:
Performing system checks...
System check identified no issues (0 silenced).
July 09, 2019 - 15:45:49
Django version 2.0, using settings 'project.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
Error: That port is already in use.
Django Investigations 