Frustration with custom Inline forms

[Ben Gerdemann]

I'm trying to customize the inline forms of a model that are displayed
when I'm editing it's parent, but I can't get anything to work! Can
someone help? First, here are my models:

class T22Pais(models.Model):
a22_id = models.AutoField(primary_key=True)
a22_nome_1 = models.CharField("Nome Responsavel
#1",max_length=255)

class T55Visitas(models.Model):
a55_id = models.IntegerField(primary_key=True)
a55_visita_agendada = models.DateTimeField(null=True, blank=True)
a22 = models.ForeignKey(T22Pais,verbose_name="Pais")

The documentation says "The InlineModelAdmin class is a subclass of
ModelAdmin so it inherits all the same functionality as well as some
of its own," so first I tried this:

class T22PaisAdmin(admin.ModelAdmin):
inlines = [T55VisitasInline]

class T55VisitasInline(admin.StackedInline):
exclude = ('a55_id')
model = T55Visitas

but nothing changes. I tried a couple variations of the name without
and without quotes and adding the model hierarchy exclude=
('T55Visitas.a55_id') but nothing worked.

Then I noticed that the documentation refers to form and formset
fields in InlineModelAdmin. The documentation isn't very clear how to
use these, but I tried the following things and nothing had any
effect: the inline form was always rendered with all of its fields:

class T55VisitasInlineForm(forms.ModelForm):
class Meta:
model = T55Visitas
exclude = ('a55_id')

class T55VisitasInline(admin.StackedInline):
model = T55Visitas
form = T55VisitasInlineForm

tried adding a formset:

class T55VisitasInline(admin.StackedInline):
model = T55Visitas
form = T55VisitasInlineForm
formset = inlineformset_factory(
T22Pais,
T55Visitas,
exclude = ('a55_id')
)

adding the same form back into the formset even though I'm already
setting T55VisitasInline.form, but no dice. :(

class T55VisitasInline(admin.StackedInline):
model = T55Visitas
form = T55VisitasInlineForm
formset = inlineformset_factory(
T22Pais,
T55Visitas,
form = T55VisitasInlineForm,
exclude = ('a55_id')
)

How can I get this to work??? Grrr... Ideally, I'd like to have a
fully custom inline form using "fieldsets," but for now I'll settle
for just hiding fields.

Cheers,
Ben

[Ben Gerdemann]

Ok, so I just noticed that the a55_id field which is the primary key,
was declared as an IntegerField instead of an AutoField which is why
it was showing up on the inline form, but I still can't get any of the
other fields excluded from the inline form so the problem is still
there.

Also, if it helps for understanding Pais = Parents and Visitas =
Visits in Portuguese.

Thanks again for any and all help.

Cheers,
Ben

[Kip Parker]

There's a problem with the exclude statements above, you've got tuple-
trouble, missing trailing commas:

exclude = ('a55_id') should be ('a55_id',) or ['a55_id']

easy mistake, search for "tuple" in this group and you'll see you have
company.

Kip.

[Daniel Roseman]

On Nov 17, 2:01 pm, Ben Gerdemann <gerd...@gmail.com> wrote:

The only thing I can see in your code that might cause problems is the
value for exclude:

exclude = ('a55_id')

This is not what you think it is. It's not a single-element tuple. It
is actually a single string, which will be treated as if it were a
list of characters ie ['a', '5', '5', '_', 'i', 'd']. Naturally, the
admin doesn't recognise this as a field, so won't exclude it.

I think what you meant was
exclude = ('a55_id',)
- note the extra comma, which is how you define a single-element
tuple.

There's no reason you can't have custom forms in an inline formset - I
do this all the time, using very similar code to the above.
--
DR.

[Ben Gerdemann]

Thank you thank you thank you! I knew I was doing something simple
wrong. :)

I've been enjoying my experience using Django so far, but one thing I
have noticed is that the error messages (or in this case lack of error
messages) can be frustrating. It sometimes takes me quite a while to
figure out what caused an exception especially if there are no line
numbers of my own code. In this case, it's actually the Python syntax
and I'm not sure what Django could do if your syntax is wrong, but I
sure spent a while tracking this down....

Cheers,
Ben