Best thing I can suggest is to create a clean_FIELDNAME method in the
ModelForm... this method should use self.cleaned_data['FIELDNAME'] to
retrieve the value. check it, and return it if things are good, or raise
ValidationError if things are bad.
An alternate is to make the adjustment to the Model Field... when you
create the country,CharField... pass a callback function through the
validators attribute to validate.
This way you'll validate at the model level, rather than the form level.
On Tuesday, December 4, 2012 3:40:41 AM UTC-8, nav wrote:
>
> Dear Folks,
>
> I have an Admin form which has two textfields namely country and state. I
> have made it more user friendly by making textfield a dropdown with the
> value to select for those fields.
>
> The model i have has some constraints which I cannot change i.e. that the
> country value must be a 2 letters in length such as 'US' for United States
> as these codes are unique. Simlarly for states of a country which can have
> code up to 10 letters in length. Since my dropdown contains the names and
> not the codes I need a way to excude them from validation change there
> values so that they are database friendly and save them.
>
> After much research I came across two methods full_clean() and
> clean_fields() which is where the key lies but I have no idea how to use
> them.
>
> So far the validation errors on country and state keep firing and there
> does not seem a way to stop it. Secondly if you exclude fields from
> validation do I access them directly using the POST data and modify them
> before saving?
>
> The relevant code is below:
>
> class GroupAdminForm(forms.ModelForm):
>
> creator =
> CustomCreatorChoiceField(queryset=User.objects.order_by('last_name'))
> country =
> CustomLocationChoiceField(queryset=Country.objects.order_by('name'))
> state =
> CustomLocationChoiceField(queryset=Subdivision.objects.order_by('name'))
>
> def clean_fields(self, exclude=['country', 'state']): # or I could use
> full_clean
> print "Inside clean_fields"
> return
>
> def __init__(self, *args, **kwargs):
> super(GroupAdminForm, self).__init__(*args, **kwargs)
> self.fields['country'].initial = DEFAULT_COUNTRY
>
> My model is below:
>
> class Group(models.Model):
>
> # Name of the group
> name = models.CharField(max_length=100)
> # Longer description of group
> description = models.TextField(blank=True)
> # Group owner
> creator = models.ForeignKey(User, related_name='groups_created')
> # Creation date
> creation_date = models.DateTimeField()
>
> # Country foreign key to Country table in Geography App
> country = models.CharField(max_length=2, null=True, default='US')
>
> # State foreign key to State table in Geography App
> state = models.CharField(max_length=10, null=True, blank=True)
>
> # City where group is located
> city = models.CharField(max_length=40, null=True, blank=False)
>
> # Public (searchable) group
> public = models.BooleanField(default=True, null=False)
>
> Please do let me know if anything else is needed.
>
> Cheers,
> nav
>
>
>
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