app/django/middleware/transaction.py
author Sverre Rabbelier <srabbelier@gmail.com>
Tue, 02 Dec 2008 20:10:23 +0000
changeset 649 95a41542e693
parent 54 03e267d67478
permissions -rw-r--r--
Finish Program Added some fields, and made TinyMCE the editor for the description field. Also updated the public page to show these new fields. We really need generic public views... Patch by: Sverre Rabbelier
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from django.db import transaction
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class TransactionMiddleware(object):
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    """
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    Transaction middleware. If this is enabled, each view function will be run
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    with commit_on_response activated - that way a save() doesn't do a direct
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    commit, the commit is done when a successful response is created. If an
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    exception happens, the database is rolled back.
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    """
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    def process_request(self, request):
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        """Enters transaction management"""
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        transaction.enter_transaction_management()
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        transaction.managed(True)
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    def process_exception(self, request, exception):
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        """Rolls back the database and leaves transaction management"""
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        if transaction.is_dirty():
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            transaction.rollback()
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        transaction.leave_transaction_management()
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    def process_response(self, request, response):
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        """Commits and leaves transaction management."""
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        if transaction.is_managed():
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            if transaction.is_dirty():
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                transaction.commit()
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            transaction.leave_transaction_management()
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        return response