Re: How to delete a referenced object when the object, referencing the other object, is deleted?

On Wed, Aug 20, 2014 at 4:34 PM, Oliver Funk <oli.funk@gmail.com> wrote:
> I posted the following question on SO (link) and I haven't received any
> helpful answers. Can someone here please help me?

Sorry, same answers here - move the OneToOne to the other model or use
pre_delete signals to check how many related objects there will be
post delete.

You can simplify the whole logic by removing the need for two classes
- a Todo is a Reminder with null/empty start/stop time.

> Also, with regards to:
>
> stop_time = models.DateTimeField(blank=True)
>
> If it is left blank in the form, what will the default value be, stored in
> the database?
>

I don't know; whenever I have a DateTimeField that is potentially not
specified, I will specify the field as "blank=True, null=True". In
that scenario, Django stores NULL as the date in the database,
represented as None in python.

Cheers

Tom

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