This example shows, how to use database views with django models. NewestArticle models contains 100 newest Articles. Remember, that NewestArticle model is read-only. Tested with mysql.
Callable object as signal receiver.
Standard memcache client uses pickle as a serialization format. It can be handy to use json, especially when another component (e.g. backend) doesn't know pickle, but json yes.
Other approach of making middleware. Advantage of is to specify, which middleware is used for which view function and in what order. Middleware function gets all arguments, that are passed to view function. **Example usage** @RequestMiddleware def print_params_middleware(request, *args, **kwargs): print 'GET params:', request.GET @ResponseMiddleware def modify_headers_middleware(request, response, *args, **kwargs): response['Content-Type'] = 'text/html' @ExceptionMiddleware def catch_error_middleware(request, e, *args, **kwargs): return HttpResponse('catched error %s' % e ) @modify_headers_middleware @catch_error_middleware @print_params_middleware def some_view(request, *args, **kwargs): print 'someview' return HttpResponse()
When you neeed to do redirect and request object is not available, you can do it with exception. Put exception handler somewhere request is available, for example to middleware or ModelAdmin. Raise exception, where request is not available.
Sometime may be useful to disable the HTML output from formfield to template.
This is a XML-RPC server, that uses arguments in URLs and every dispatcher instance is prepared in memory during webserver run. It's good, for example, for securing XML-RPC server with hashed strings and there are a lot of similar use cases. Usage: from xmlrpclib import ServerProxy server = ServerProxy('http://example.com/xmlr-rpc/%s/' % something, allow_none=True) server.do_something(*args)
This custom model field is a variant of NullBooleanField, that stores only True and None (NULL) values. False is stored as NULL. It's usefull for special purposes like unique/unique_together. One small problem is here, that False is not lookuped as None. This snippets is a response to [1830](http://www.djangosnippets.org/snippets/1830/)