#30710: impossible without workarounds to see which fields changed when
subscribing
to signals from generic views
-----------------------------------------+------------------------
Reporter: MaxR | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 2.1
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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for example I have simple `generic view`:
{{{
#views.py
class CollectorUpdate(generic.UpdateView):
model = ReportBase
fields = ['title', 'db', 'additionalPath', 'start_date', 'end_date',
'reportTimestamp',
'updMethod', 'cronStr', 'code', 'code_renew']
template_name = 'collector/collector_update_form.html'
}}}
and subscribe to `post_save` signal:
{{{
@receiver(signal=signals.post_save, sender=ReportBase)
def runCron(sender, **kwargs):
"""Signal handler. Run cron after post_save signal on """
collector = kwargs.get('instance')
updated_fields = kwargs.get('update_fields')
}}}
but `updated_fields` always is `None`
I think the problem is that in generic.UpdateView into `.save()` method it
is necessary to register a field `field_update` with interesting for me
fields.
As workaround i'm using an instyance of saved object:
{{{
collector = kwargs.get('instance')
}}}
but it's looks strange and it is inconvenient. I have to do a lot of extra
work
--
Ticket URL: <https://code.djangoproject.com/ticket/30710>
Django <https://code.djangoproject.com/>
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