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Reload django object from database
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Couldn't find details in the docs, but it properly throws a DoesNotExist exception if the underlying object was deleted when calling refresh_from_db. FYI.
– Tim Tisdall
Jan 17 at 19:26
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What is the 'cls' variable used for in Python classes?
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It's used in case of a class method. Check this reference for further details.
EDIT: As clarified by Adrien, it's a convention. You can actually use anything but cls and self are used (PEP8).
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Google Chromecast sender error if Chromecast extension is not installed or using incognito
...id) you can install the extension here: https://chrome.google.com/webstore/detail/google-cast/boadgeojelhgndaghljhdicfkmllpafd/reviews?hl=en
I left a review asking for a fix. You can also do a bug report via the extension (after you install it) here. Instructions for doing so are here: https://supp...
How to extract public key using OpenSSL?
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For those interested in the details - you can see what's inside the public key file (generated as explained above), by doing this:-
openssl rsa -noout -text -inform PEM -in key.pub -pubin
or for the private key file, this:-
openssl rsa -noout -text ...
How do I set a cookie on HttpClient's HttpRequestMessage
...ful tool.
Firstly, I used Telerik's Fiddler 4 to study my Web Requests in details
Secondly, I came across this useful plugin for Fiddler:
https://github.com/sunilpottumuttu/FiddlerGenerateHttpClientCode
It will just generate the C# code for you. An example was:
var uriBuilder = new Ur...
How to list records with date from the last 10 days?
...E - INTERVAL '10 days');
The operators/functions above are documented in detail:
CURRENT_DATE
INTERVAL '10 days'
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Why is \r a newline for Vim?
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:help NL-used-for-Nul
Technical detail:
<Nul> characters in the file are stored as <NL> in memory. In the display
they are shown as "^@". The translation is done when reading and writing
files. To match a <Nul> with a search pat...
How to properly URL encode a string in PHP?
...ubject = 'I just bought this for you';
$body = 'Please enter your shipping details here: ' . $redeemUrl;
// A URI for the email as prescribed
$mailToUri = 'mailto:?subject=' . rawurlencode($subject) . '&body=' . rawurlencode($body);
// Print an HTML element with that mailto link
echo '<a hr...
ContextLoaderListener or not?
...context (servlet) only. However, with that approach you run into issues as detailed in the solution itself: "The only compelling reasons to use the webapp-level context are:" ... "If you have servlet filters that hook into the webbapp-level context (e.g. Spring Security's DelegatingFilterProxy, Ope...
LINQ To Entities does not recognize the method Last. Really?
... databases in general) does not support all the LINQ methods (see here for details: http://msdn.microsoft.com/en-us/library/bb738550.aspx)
What you need here is to order your data in such a way that the "last" record becomes "first" and then you can use FirstOrDefault. Note that databasese usually ...