well, now I´m totally confused.
I though that´s exactly what custom manipulators are here for:
"You can easily create your own custom manipulators for handling  
custom forms." (django documentation).

more below ...

Am 21.09.2006 um 22:47 schrieb Ivan Sagalaev:

>
> patrickk wrote:
>> flatten_data() doesn´t relate to the custom manipulator but to model
>> resp. the changemanipulator.
>
> I see now... And if I'm guessing correctly you're creating a  
> FormWrapper
> from user_profile_manipulator that just doesn't have that checkbox  
> field.

that´s right. user_profile_manipulator doesn´t have that checkbox field.
in the model, the relation is defined as:
music = models.ManyToManyField(Music, blank=True, null=True,  
related_name='music')

at this point, there is nothing defined about *how* to display that  
relation (e.g. using checkboxes).

>
> Anyway making two manipulators is unnecessary and I can't even imagine
> how is this supposed to work :-).

as mentioned above, I thought that´s the primary use-case for custom  
manipulators:
the custom manipulator handles the custom form
the changemanipulator handles the data

is that wrong?

>
> Now, if I understand your task you want a form for your user  
> profile but
>   with multiple checkboxes for 'music' field. Right? Then you can
> inherit you manipulator from automatic  
> UserProfile.ChangeManipulator and
> replace this field with what you need:
>
>      class UserProfileManipulator(UserProfile.Manipulator):
>        def __init__(self, id):
>          UserProfile.Manipulator.__init__(self, id)
>
>          # Finding and removing standard field
>          for field in self.fields:
>            if field.field_name == 'music':
>              self.fields.remove(field)
>              break
>
>          # Adding custom field
>          MUSIC_CHOICES = [(str(c.id), str(c))
>            for c in  Music.objects.all()]
>          self.fields.append(forms.CheckboxSelectMultipleField(
>            'music',
>            choices=MUSIC_CHOICES))
>
> Does it make sense?

some thoughts on that:
1. if I do it that way, I´m having checkboxes in the admin-interface,  
right?
2. is that the standard way to do it? it seems really complicated  
(ref. to finding and removing fields)?
3. instead of "finding and removing a field" - why not write a custom  
manipulator, add specific validation etc.?

your suggestion might work, but (to me) it doesn´t seem like the  
"django way" to do that.

thanks a lot for your help.
gotta get some sleep,
patrick


>
> >


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