#2214: Transaction already begun or not begun problem when raise
InternalRedirect
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Reporter: victorlin | Owner: faide
Type: defect | Status: new
Priority: normal | Milestone: 1.1
Component: TurboGears | Version: 1.0.8
Severity: normal | Keywords: transaction internalredirect redirect
database session
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I encounter transaction already begun, or encounter not begun error when I
call session.commit in exposed method. This problem occurs after I use
InternalRedirect to perform internal redirection. I thought that's a bug
of turbogears in the expose function. It guess it might start transaction
twice, or no start. I try to fix the bug by add "del
cherrypy.request.in_transaction" before internal redirect, it works. This
is the method I wrote.
{{{
@tg.expose()
def default(self, site_name, *args, **kwargs):
cherrypy.request.site_name = site_name
url = tg.url(['/site'] + list(args))
if cherrypy.request.browser_url.endswith('/'):
url += '/'
log.debug('Internal redirect to %s with params %r', url, kwargs)
# do this to prevent bug
del cherrypy.request.in_transaction
raise cherrypy.InternalRedirect(url, params=kwargs)
}}}
To reproduce "transaction already begun" error, raise
cherrypy.InternalRedirect might work. The error do not occurs every time,
it sometimes show up, sometimes not. However, call session.commit in
exposed method do raise "no transaction begun" error every time.
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Ticket URL: <http://trac.turbogears.org/ticket/2214>
TurboGears <http://www.turbogears.org/>
TurboGears front-to-back web development
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