#11097: Formset documentation should include a note about form.blah_ptr for
derived
models
---------------------------+------------------------------------------------
Reporter: drozzy | Owner: nobody
Status: new | Milestone:
Component: Documentation | Version: 1.0
Keywords: | Stage: Unreviewed
Has_patch: 0 |
---------------------------+------------------------------------------------
Whenever a model inherits from a non-abstract model, it shares it's
primary key with it.
As a consequence, the form produced by inlineformset_factory no longer has
id field, by the "parentname_ptr" field.
For example imagine you have a case such as:
{{{
class Car(models.Model):
color = #string field
class BMW(Car):
shop = models.ForeignKey(CarShop)
}}}
Then in our view:
{{{
car = BMW.objects.get(pk=1)
BMWFromset = inlineformset_factory(CarShop, BMW,
can_delete=True,
extra=1)
formset = BMWFormset(instance=car)
}}}
The in our html:
{{{
<form method="post">
{{formset.management_form}}
<ul>
{% for form in formset.forms %}
<li>
<!-- NOTICE that we do NOT use form.id here -->
{{form.car_ptr}}
{{form}}
</li>
{% endfor %}
</ul>
<input type="submit" value="submit" />
</form>
}}}
--
Ticket URL: <http://code.djangoproject.com/ticket/11097>
Django <http://code.djangoproject.com/>
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