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Django admin: how to sort by one of the custom list_display fields that has no database field
...rder__count'
This way you only annotate inside the admin interface. Not with every query that you do.
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Get generated id after insert
I'm using the SQLite with Android, and I want to know the best way to get the generated id of the row I inserted.
5 Answers...
$(document).ready equivalent without jQuery
I have a script that uses $(document).ready , but it doesn't use anything else from jQuery. I'd like to lighten it up by removing the jQuery dependency.
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Django, creating a custom 500/404 error page
... following two views, and just set up the templates 404.html and 500.html with what you want to display.
With this solution, no custom code needs to be added to urls.py
Here's the code:
from django.shortcuts import render_to_response
from django.template import RequestContext
def handler404(req...
RE error: illegal byte sequence on Mac OS X
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A sample command that exhibits the symptom: sed 's/./@/' <<<$'\xfc' fails, because byte 0xfc is not a valid UTF-8 char.
Note that, by contrast, GNU sed (Linux, but also installable on macOS) simply passes the invalid byte through, without repo...
Django FileField with upload_to determined at runtime
I'm trying to set up my uploads so that if user joe uploads a file it goes to MEDIA_ROOT/joe as opposed to having everyone's files go to MEDIA_ROOT. The problem is I don't know how to define this in the model. Here is how it currently looks:
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Automatic post-registration user authentication
...lding a business app from the ground up in Symfony 2, and I've run into a bit of a snag with the user registration flow: after the user creates an account, they should be automatically logged in with those credentials, instead of being immediately forced to provide their credentials again.
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How to use a custom comparison function in Python 3?
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edited Feb 6 '19 at 6:19
caot
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How to read a large file line by line?
I want to read a file line by line, but without completely loading it in memory.
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php出现 Notice: Undefined index: xxx 的解决方法 - 更多技术 - 清泛网 - 专注IT技能提升
php出现 Notice: Undefined index: xxx 的解决方法Php_Notice_Undefined_index方法出现 "Undefined index: xxx "警告的原因：PHP 本身不需要事先声明变量即可直接使用，但是对未声明变量会有提示，最好的办法是使用变量之前先检查变量是否存在。...