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28 / 30Django Forms and ValidationHardPython - Django Framework

Working with Form Bound and Unbound States

from django import forms

class FeedbackForm(forms.Form):
    rating = forms.IntegerField(min_value=1, max_value=5)
    comment = forms.CharField(required=False)

unbound_form = FeedbackForm()
bound_form = FeedbackForm(data={'rating': '4', 'comment': 'Great!'})

print(f'Unbound is_bound: {unbound_form.is_bound}')
print(f'Bound is_bound: {bound_form.is_bound}')
print(f'Bound is_valid: {bound_form.is_valid()}')

  1. Both forms are bound, output is True, True, True

  2. Unbound is False, Bound is True, valid is True

  3. Both forms are unbound, output is False, False, False

  4. is_bound attribute doesn't exist in Django forms

Show answer & explanation

Correct answer

Unbound is False, Bound is True, valid is True

Explanation

An unbound form (created without data) has is_bound=False and cannot be validated. A bound form (created with data) has is_bound=True and can be validated. Bound form with valid data returns is_valid()=True. Output shows False, True, True respectively.

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All 30 Django Forms and Validation questions

  1. 1.What is the primary purpose of Django Forms?
  2. 2.Which Django class is used to create a form?
  3. 3.What does the is_valid() method do in Django Forms?
  4. 4.Which field type in Django Forms is used for email validation?
  5. 5.What is the purpose of the clean() method in Django Forms?
  6. 6.How do you access form errors in Django?
  7. 7.What does ModelForm do in Django?
  8. 8.Which method is used to render form fields in a Django template?
  9. 9.What is the purpose of the required parameter in Django form fields?
  10. 10.Which validator ensures a field value is within a specific range?
  11. 11.Scenario:
  12. 12.What will be the output of the following Django form code?
  13. 13.Scenario:
  14. 14.What will be the output of the following code?
  15. 15.Scenario:
  16. 16.What will this code output?
  17. 17.Scenario:
  18. 18.What will be the output of the following ModelForm code?
  19. 19.Scenario:
  20. 20.What will this code output?
  21. 21.Understanding Django Form Validation Pipeline and Custom Validators
  22. 22.Django ModelForm Field Exclusion and Customization
  23. 23.Scenario:
  24. 24.Django Form Rendering with Widgets and HTML Attributes
  25. 25.Understanding Form.errors and Non-Field Errors
  26. 26.Django Form Inheritance and Method Resolution Order
  27. 27.Scenario:
  28. 28.Working with Form Bound and Unbound States
  29. 29.Custom Validators and Reusability Across Forms
  30. 30.Scenario: