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Django auto_now and auto_now_add
...t using a custom save() method.
So, to make this work properly, I would recommend not using auto_now or auto_now_add and instead define your own save() method to make sure that created is only updated if id is not set (such as when the item is first created), and have it update modified every time...
What is the difference between task and thread?
... terms, a Task represents an asynchronous operation. Thread(s) are used to complete that operation by breaking the work up into chunks and assigning to separate threads.
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Difference between break and continue statement
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Automatic Retina images for web sites
...low-res.jpg" srcset="high-res.jpg 2x">
Browser Support: http://caniuse.com/#search=srcset
Other Resources:
WebKit release post
W3C documentation for srcset
good explanation about why and how to use srcset
Chris Coyer's post for more good info
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Using module 'subprocess' with timeout
Here's the Python code to run an arbitrary command returning its stdout data, or raise an exception on non-zero exit codes:
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Select values from XML field in SQL Server 2008
...irst XML record. And it refers to some [myTable] table... where did that come from ?!
– Mike Gledhill
Sep 8 '16 at 9:05
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Rails extending ActiveRecord::Base
...me and effort saved is always extracted back
sometime in the future; with compound interest. These days I limit monkey patching to quickly prototype a solution in the rails console.
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Unable to simultaneously satisfy constraints, will attempt to recover by breaking constraint
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I would recommend to debug and find which constraint is "the one you don't want". Suppose you have following issue:
Always the problem is how to find following Constraints and Views.
There are two solutions how to do this:
DEBUG ...
Dynamic LINQ OrderBy on IEnumerable / IQueryable
...he dynamic LINQ library, you just need the code as below. This covers most common scenarios including nested properties.
To get it working with IEnumerable<T> you could add some wrapper methods that go via AsQueryable - but the code below is the core Expression logic needed.
public static IO...
Python Git Module experiences? [closed]
...mentioning for searchers that GitPython does a good job of abstracting the command line tools so that you don't need to use subprocess. There are some useful built in abstractions that you can use, but for everything else you can do things like:
import git
repo = git.Repo( '/home/me/repodir' )
prin...