This is my solution which seems to work but frightens me a bit.
class Chemical(models.Model):
# lots of fields
def save(self, *args, **kwargs):
self.process_stuff_based_on_field_values_pre_save()
first = False
if not self.id:
first = True
super().save(force_insert=True, *args, **kwargs)
if self.id:
self.create_or_update_a_bunch_of_related_records(first=first)
super().save(force_insert=False, *args, **kwargs)
self.create_or_update_a_bunch_of_m2m_records(first=first)
def process_stuff_based_on_field_values_pre_save(self, first=False):
...
def create_or_update_a_bunch_of_m2m_records(self, first=False):
...
# lots of other methods
Thanks for any warnings, caveats
Cheers
Mike
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