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Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
... the same problem after restructuring the settings as per the instructions from Daniel Greenfield's book Two scoops of Django.
I resolved the issue by setting
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "project_name.settings.local")
in manage.py and wsgi.py.
Update:
In the above solution...
Why does NULL = NULL evaluate to false in SQL server
...
SQL NULL is not any different from IEEE floating point NaN, where you also have (NaN == NaN) == false && (NaN != Nan) == false && (NaN < NaN) == false && ... - because, well, if it's not a number, you just can't say much about i...
How to access session variables from any class in ASP.NET?
...
(Updated for completeness)
You can access session variables from any page or control using Session["loginId"] and from any class (e.g. from inside a class library), using System.Web.HttpContext.Current.Session["loginId"].
But please read on for my original answer...
I always use a...
How to convert a std::string to const char* or char*?
... you could, but strdup is not a c or c++ standard function, it's from posix :)
– Johannes Schaub - litb
Dec 7 '08 at 20:39
14
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Understanding the Gemfile.lock file
...lot whilst building an automated dependency update tool1. The below is far from definitive, but it's a good starting point for understanding the Gemfile.lock format. You might also want to check out the source code for Bundler's lockfile parser.
You'll find the following headings in a lockfile gene...
Sort array of objects by object fields
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Use usort, here's an example adapted from the manual:
function cmp($a, $b) {
return strcmp($a->name, $b->name);
}
usort($your_data, "cmp");
You can also use any callable as the second argument. Here are some examples:
Using anonymous functions (from...
Xcode suddenly stopped running project on hardware: “Could not launch xxx.app: .. No such file..” [c
...s stopped being able to run my app, it started directly after I deleted it from the device and attempted to re-install by rerunning it in Xcode (something I've done hundreds of times before).
...
Dynamic instantiation from string name of a class in dynamically imported module?
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module = __import__(module, fromlist=[name]) only worked for me.
– umpirsky
Jan 9 '12 at 18:18
16
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How do I run Redis on Windows?
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Download Microsoft's port from their GitHub repository.
This release includes the redis-server.exe application that runs a Redis instance as a service on your windows machine, as well as redis-cli.exe which you can use to interact with any Redis insta...
Postgres - FATAL: database files are incompatible with server
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If you recently upgraded to 11 or 12 from 10.x you can run the below command to upgrade your postgres data directory retaining all data:
brew postgresql-upgrade-database
The above command is taken from the output of brew info postgres
...