well override ModelForm's __init__ and if theres a kwargs , then populate
choices depending upon the value of model_name , as well override def
clean() to handle model attribute.
class ConditionSetAdminForm(forms.ModelForm):
def __init__(self,*args,**kwargs):
super(ConditionSetAdminForm, self).__init__(*args,**kwargs)
try:
model_name = kwargs['instance'].model_name
app_label,model_class =
model_name.split('.')[0],model_name.split('.')[1]
model_class = get_model(app_label=app_label,
model_name=model_class)
self.fields['model_attribute'] =
forms.ChoiceField(required=True, label='Model Attribute', choices=
[(each.name,each.name) for each in model_class._meta.fields])
except:
self.fields['model_attribute'] =
forms.ChoiceField(required=True, label='Model Attribute',
choices=get_attributes())
self.fields['model_name'] = forms.ChoiceField(required=True,
label='Model Name', choices=get_all_models())
class Meta:
model = ConditionSet
def clean(self):
super(ConditionSetAdminForm,self).clean()
if 'model_attribute' in self._errors:
self.cleaned_data['model_attribute'] =
self.data['model_attribute']
del self._errors['model_attribute']
return self.cleaned_data
just like that ;)
On Tuesday, February 12, 2013 5:09:51 PM UTC+5:30, vijay shanker wrote:
>
> hey all
>
> I have a model which is as such:
> *in models.py*
>
> class ConditionSet(models.Model):
> model_name = models.CharField(max_length=
> 50)
> model_attribute = models.CharField(max_length=50)
> operator = models.CharField(max_length=50,
> choices=OPERATORS)
> val =
> models.CharField(max_length=50,null=True,blank=True)
> evaluation = models.NullBooleanField(null=True, blank=True)
> def __str__(self):
> return self.model_attribute
>
> *in admin.py :*
>
> def get_all_models():
> return [('.'.join([each._meta.app_label,each.__name__]),each.__name__)
> for each in [each.model_class() for each in
> ContentType.objects.filter(app_label__in=['products','productoptions','shoppingcart'])
>
> if each is not None] if each is not None]
>
> def get_attributes():
> model_class =
> ContentType.objects.filter(app_label__in=['products','productoptions','shoppingcart'])[0].model_class()
> return [ (each.name,each.name) for each in model_class._meta.fields ]
>
> class ConditionSetAdminForm(forms.ModelForm):
> def __init__(self,*args,**kwargs):
> super(ConditionSetAdminForm, self).__init__(*args,**kwargs)
> self.fields['model_name'] = forms.ChoiceField(required=True,
> label='Model Name', choices=get_all_models())
> self.fields['model_attribute'] = forms.ChoiceField(required=True,
> label='Model Attribute', choices=get_attributes())
> class Meta:
> model = ConditionSet
>
> class ConditionSetAdmin(admin.ModelAdmin):
> form = ConditionSetAdminForm
>
> admin.site.register(ConditionSet, ConditionSetAdmin )
>
> model_attribute has an initial set of choices, populated by
> get_attributes().
> When a user selects model_name in admin, i make a json call to get options
> and populate model_attribute options , but when i try to save it, i get
> "select a valid choice. xyz_attribute_name is not one of the available
> choices."
> I understand the problem is the choices for this field are still the one
> assigned to it in beginning, how should I fix it ?
>
>
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