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What's Mongoose error Cast to ObjectId failed for value XXX at path “_id”?
...sending a request to /customers/41224d776a326fb40f000001 and a document with _id 41224d776a326fb40f000001 does not exist, doc is null and I'm returning a 404 :
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How to send an email from JavaScript
I want my website to have the ability to send an email without refreshing the page. So I want to use Javascript.
20 Answers...
How to avoid annoying error “declared and not used”
I'm learning Go but I feel it is a bit annoying that when compiling, I should not leave any variable or package unused.
8 ...
Calculate distance between 2 GPS coordinates
How do I calculate distance between two GPS coordinates (using latitude and longitude)?
29 Answers
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How to disable Django's CSRF validation?
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edited Oct 1 '19 at 16:36
Lutz Prechelt
26.4k55 gold badges4949 silver badges7171 bronze badges
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In a django model custom save() method, how should you identify a new object?
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Updated: With the clarification that self._state is not a private instance variable, but named that way to avoid conflicts, checking self._state.adding is now the preferable way to check.
self.pk is None:
returns True within a new...
How do you test that a Python function throws an exception?
How does one write a unittest that fails only if a function doesn't throw an expected exception?
13 Answers
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Python ElementTree module: How to ignore the namespace of XML files to locate matching element when
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Instead of modifying the XML document itself, it's best to parse it and then modify the tags in the result. This way you can handle multiple namespaces and namespace aliases:
from io import StringIO # for Python 2 import from StringIO instead
import xml.etree.E...
MemoryCache does not obey memory limits in configuration
I’m working with the .NET 4.0 MemoryCache class in an application and trying to limit the maximum cache size, but in my tests it does not appear that the cache is actually obeying the limits.
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How do I call setattr() on the current module?
...hismodule = sys.modules[__name__]
setattr(thismodule, name, value)
or, without using setattr (which breaks the letter of the question but satisfies the same practical purposes;-):
globals()[name] = value
Note: at module scope, the latter is equivalent to:
vars()[name] = value
which is a bit...