Django forms.Form reflecting property field constraints

I’m implementing a Django Form witch should contain the field ‘fieldA’ from modelA:

class ModelA(models.Model):
    fieldA =  models.CharField(max_length=8)
    ...

My question is: Is there a way to have Django form, which will automatically handle validation of fieldA (check the max_length)? I know I Could use form.ModelFormclass referring to ModelA, but then the form would reflect all the fields of the ModelA. I would like to use simple forms.Form.

I’m looking for a solution like:

class formX(forms.Form):
    fieldA = forms.CharField(**modelA.fieldA.constraints)
    fieldB = ... some other fields not related to ModelA ...
    .... even more fields

Answer

I found a way how to achieve a validation of form Field reflecting constrains from model Field.

class Foo(models.Model):
    x = models.CharField(max_length=30)
    y = models.IntegerField(null=True)

class FooForm(forms.Form):
    foo_x = forms.CharField(validators=Foo._meta.get_field('x').validators)

Like this, the form will respect the max_length validator of attribute x or any other validator defined.