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How to delete a record in Django models?
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551
There are a couple of ways:
To delete it directly:
SomeModel.objects.filter(id=id).delete()
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How to flatten nested objects with linq expression
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answered Jun 21 '11 at 16:49
Yuriy FaktorovichYuriy Faktorovich
59.8k1313 gold badges9999 silver badges133133 bronze badges
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How to do a git diff on moved/renamed file?
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145
You need to use -M to let git autodetect the moved file when diffing. Using just git diff as k...
Should ol/ul be inside or outside?
...and curiosities. You want to know if an ol can live inside a p. So…
4.5.1 The p element:
Categories: Flow content, Palpable content.
Content model: Phrasing content.
4.5.5 The ol element:
Categories: Flow content.
Content model: Zero or more li and script-supporting elements.
The first pa...
Python strptime() and timezones?
...'t work with %Z, so the case is important. See the following example:
In [1]: from datetime import datetime
In [2]: start_time = datetime.strptime('2018-04-18-17-04-30-AEST','%Y-%m-%d-%H-%M-%S-%Z')
In [3]: print("TZ NAME: {tz}".format(tz=start_time.tzname()))
TZ NAME: None
In [4]: start_time = d...
How can you diff two pipelines in Bash?
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146
A one-line with 2 tmp files (not what you want) would be:
foo | bar > file1.txt &&...
Grep characters before and after match?
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187
3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o ...
“Diff” an image using ImageMagick
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My own favorites are these two:
compare image1 image2 -compose src diff.png
compare image1 image2 -compose src diff.pdf
The only difference between the 2 commands above: the first one shows the visual difference between the two images as a PNG file, the second one as...
Mongoose query where value is not null
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185
You should be able to do this like (as you're using the query api):
Entrant.where("pincode")....