app/django/middleware/transaction.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Mon, 17 Nov 2008 22:21:02 +0000
changeset 502 e1e24c0a4e82
parent 54 03e267d67478
permissions -rw-r--r--
Add new parameters to views: url_name which is name used in urls (instead of using lower entity names) and module_name which is used for constructing django urls. Append changes to all affected files. Fix some title names. Change urls that included underscores like "site_settings" into urls with slash "site/settings". Plus some other minor fixes. Patch by: Pawel Solyga

from django.db import transaction

class TransactionMiddleware(object):
    """
    Transaction middleware. If this is enabled, each view function will be run
    with commit_on_response activated - that way a save() doesn't do a direct
    commit, the commit is done when a successful response is created. If an
    exception happens, the database is rolled back.
    """
    def process_request(self, request):
        """Enters transaction management"""
        transaction.enter_transaction_management()
        transaction.managed(True)

    def process_exception(self, request, exception):
        """Rolls back the database and leaves transaction management"""
        if transaction.is_dirty():
            transaction.rollback()
        transaction.leave_transaction_management()

    def process_response(self, request, response):
        """Commits and leaves transaction management."""
        if transaction.is_managed():
            if transaction.is_dirty():
                transaction.commit()
            transaction.leave_transaction_management()
        return response