Thanks. It seems so obvious something kept telling that forms worked
differently in the Admin interface compared to normal developer defined
forms. This is exactly what I would have done if it was form that I had
defined.
Cheers,
nav
On Wednesday, December 5, 2012 5:21:37 AM UTC+5:30, Chris Cogdon wrote:
>
> 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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