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Middelware to remember sql query log from before a redirect

Author:
miracle2k
Posted:
September 17, 2007
Language:
Python
Version:
.96
Score:
1 (after 1 ratings)

Simple middelware that listens for redirect responses, store the request's query log in the session when it finds one, and starts the next request's log off with those queries from before the redirect.

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from django.http import HttpResponseRedirect
from django.core.exceptions import MiddlewareNotUsed

class SqlDebuggingRedirWrapMiddleware(object):
    def __init__(self):
        if not (getattr(settings, 'DEBUG', False)):
            raise django.exceptions.MiddlewareNotUsed()
        
    def process_response(self, request, response):
        if isinstance(response, HttpResponseRedirect):
            request.session['_redir_queries'] = connection.queries
        return response
    
    def process_request(self, request):        
        if '_redir_queries' in request.session:
            connection.queries[0:0] = request.session['_redir_queries']
            del request.session['_redir_queries']

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