Custom form validation methods in Django - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a custom clean method for the 'email' field in a Django form.

Django

def clean_[1](self):
    email = self.cleaned_data.get('email')
    if not email.endswith('@example.com'):
        raise forms.ValidationError('Email must be from example.com domain')
    return email

Drag options to blanks, or click blank then click option'

Aemail

Bcheck_email

Cvalidate_email

Dclean_email

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not start with 'clean_'

Not returning the cleaned data at the end

The method name must be clean_email to validate the 'email' field specifically.

2fill in blank

medium

Complete the code to raise a validation error if the 'age' field is less than 18.

Django

def clean_age(self):
    age = self.cleaned_data.get('age')
    if age [1] 18:
        raise forms.ValidationError('You must be at least 18 years old')
    return age

Drag options to blanks, or click blank then click option'

A<

B>=

C>

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>=' instead of '<'

Using '<=' which includes 18, but 18 is allowed

The condition should check if age is less than 18 using '<'.

3fill in blank

hard

Fix the error in the custom form validation method to correctly check if the username contains spaces.

Django

def clean_username(self):
    username = self.cleaned_data.get('username')
    if ' ' [1] username:
        raise forms.ValidationError('Username cannot contain spaces')
    return username

Drag options to blanks, or click blank then click option'

Ain

Bnot in

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'not in' which reverses the logic

Using '==' which compares equality, not containment

To check if a space is inside the username string, use the 'in' keyword.

4fill in blank

hard

Fill both blanks to create a custom form validation method that checks if the password and confirm_password fields match.

Django

def clean(self):
    cleaned_data = super().[1]()
    password = cleaned_data.get('password')
    confirm = cleaned_data.get('[2]')
    if password != confirm:
        raise forms.ValidationError('Passwords do not match')
    return cleaned_data

Drag options to blanks, or click blank then click option'

Aclean

Bcleaned_data

Cconfirm_password

Dclean_password

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'cleaned_data' instead of 'clean()' for the super call

Using wrong field name for confirm password

The method calls super().clean() to get cleaned data, and the confirm password field is named 'confirm_password'.

5fill in blank

hard

Fill all three blanks to create a custom validation method that ensures the 'title' field is capitalized and at least 5 characters long.

Django

def clean_[1](self):
    title = self.cleaned_data.get('[2]')
    if len(title) [3] 5:
        raise forms.ValidationError('Title must be at least 5 characters long')
    return title.capitalize()

Drag options to blanks, or click blank then click option'

Atitle

C<

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' instead of '<' for length check

Using wrong method name or field name

The method name is 'clean_title', it gets the 'title' field, and checks if length is less than 5.