Using clean_fields and full_clean in django Admin

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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