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Django admin: how to sort by one of the custom list_display fields that has no database field
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I haven't tested this out (I'd be interested to know if it works) but what about defining a custom manager for Customer which includes the number of orders aggregated, and then setting admin_order_field to that aggregate, ie
from djan...
Get element inside element by class and ID - JavaScript
...dNodes.length; i ++) {
childNode = fooDiv.childNodes[i];
if (/bar/.test(childNode.className)) {
childNode.innerHTML = "Goodbye world!";
}
}
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List all the files that ever existed in a Git repository
...e <your@email.com>
Date: Tue Aug 12 13:28:34 2008 -0700
Added test file.
A test
Then extract files added:
git-log --name-status | sed -ne 's/^A[^u]//p' | sort -u
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impr...
How to escape a JSON string to have it in a URL?
... found a solution today using Bruno Jouhier's jsUrl.js library.
I haven't tested it very thoroughly yet. However, here is an example showing character lengths of the string output after encoding the same large object using 3 different methods:
2651 characters using jQuery.param
1691 characters us...
How do I download a tarball from GitHub using cURL?
...version number which obviously breaks automation.
This solution- currently tested and known to work with Github API v3- however can be used programmatically to grab the LATEST release without specifying any tag or release number and un-TARs the binary to an arbitrary name you specify in switch --one...
Why should eval be avoided in Bash, and what should I use instead?
...uch cases but any use of eval should be a red flag and closely examined to confirm there really isn't a better option already provided by the language.
– dimo414
Feb 13 at 20:06
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How to specify a multi-line shell variable?
...have quotes and variables in the text easily as well:
example output
$ ./test.sh
The text from the example function is:
Welcome dev: Would you "like" to know how many 'files' there are in /tmp?
There are " 38" files in /tmp, according to the "wc" command
test.sh
#!/bin/bash
function...
How to prevent browser page caching in Rails
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Agreed, this is not a valid solution, tested with Rails 5.2 and Chrome 77. no-store is also needed.
– AndrewSouthpaw
Oct 25 '19 at 4:33
ad...
TCP loopback connection vs Unix Domain Socket performance
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This answer is wrong, when tested loopback tcp on modern linux is as fast and sometimes faster than UDS. can provide benchmark if required
– easytiger
Jun 18 '14 at 13:11
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Why is LINQ JOIN so much faster than linking with WHERE?
...pecify the relation, it has to create every possible combination, and then test the condition to see which combinations are relevant.
The Join method can set up a hash table to use as an index to quicky zip two tables together, while the Where method runs after all the combinations are already crea...