Validation shouldn't be coupled with validation...

[italomaia]

Well, very simple. If i have a ModelForm and i want to change a fields widget, i got to do as follows :

class MyForm(forms.ModelForm):
    my_field = forms.SomeField(widget=my_widget)
    class Meta:
        model = my_model

Well, when i do that, part of the form's validation goes away! Let's see a actual example:

class MyModel(models.Model):
    image = models.ImageField(uploat_to="some/path")

class MyForm(forms.ModelForm):
    image = forms.SomeField(widget=SimpleFileWidget)
    class Meta:
        model = MyModel

Well, using MyForm now will not validate if image is actually a image. That seems just wrong, to me.
Something like this would be nicier:

class MyModel(models.Model):
    image = models.ImageField(uploat_to="some/path")

class MyForm(forms.ModelForm):
    image = forms.SomeField(widget=SimpleFileWidget, validation=forms.ImageValidation)
    class Meta:
        model = MyModel

or:
class MyForm(forms.ModelForm):
    image = forms.SomeField(widget=SimpleFileWidget, forms.get_validation(MyModel, "image")) # or something similar.
    class Meta:
        model = MyModel

[(none)]

Milestone post-1.0 deleted