Accessing variable within def clean() from def init()

Question

I've established a variable inside my def init function inside my form that I want to be able to access within def clean() in that same form.

def __init__(self, *args, **kwargs):                         
        super(UserOrderForm, self).__init__(*args, **kwargs)
        car = 'BMW'

def clean(self):
       cleaned_data = super(UserOrderForm, self).clean()
       print(car)

When I print car, I'm told that

name 'car' is not defined

Is there a way to do this?

Thanks!

score 2 · Accepted Answer · edited Feb 03 '19 at 00:46

In Python you declare instance attributes using self, you must change your code to

def __init__(self, *args, **kwargs):                         
        super(UserOrderForm, self).__init__(*args, **kwargs)
        self.car = 'BMW'

def clean(self):
       cleaned_data = super(UserOrderForm, self).clean()
       print(self.car)

In your original code, the variable car does exists only inside the __init__ method.

score 0 · Answer 2 · answered Feb 03 '19 at 00:42

0

i think you make the car a member variables, then set it in the init method with self.car = "bmw".

then when you want to see the value in clean, you call self.clean

python class instance variables and class variables

answered Feb 03 '19 at 00:42

Julian

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score 0 · Answer 3 · answered Feb 03 '19 at 00:57

not sure what you're trying to do, but your form should declare a model to get a queryset to work with.

class UserOrderForm(forms.ModelForm):

    class Meta:
        model = Cars
        fields = ['manufacturer', 'model_number', 'etc']
        widgets = {'manufacturer': forms.Select}

Your users will provide the input, for example selecting BMW from a select field.

Check out: https://docs.djangoproject.com/en/2.1/topics/forms/modelforms/

Accessing variable within def clean() from def __init__()

3 Answers3

Accessing variable within def clean() from def init()