Handling Forms in Django
Forms are a crucial part of any web application — they let users input and submit data. In Django, form handling is clean, secure, and straightforward thanks to its powerful django.forms module.
✅ 1. What Are Forms in Django?
Django provides a Form class to handle form creation, validation, and processing. Forms can be created in two main ways:
Django Forms – created manually using Python classes.
ModelForms – automatically generate forms from database models.
🧱 2. Creating a Basic Django Form
from django import forms
class ContactForm(forms.Form):
name = forms.CharField(max_length=100)
email = forms.EmailField()
message = forms.CharField(widget=forms.Textarea)
🧾 3. Using the Form in a View
from django.shortcuts import render
from .forms import ContactForm
def contact_view(request):
if request.method == 'POST':
form = ContactForm(request.POST)
if form.is_valid():
# Process form data
name = form.cleaned_data['name']
email = form.cleaned_data['email']
message = form.cleaned_data['message']
# Do something (e.g., send email or save to DB)
return render(request, 'thank_you.html')
else:
form = ContactForm()
return render(request, 'contact.html', {'form': form})
🖥️ 4. Rendering the Form in Template
<!-- contact.html -->
<form method="post">
{% csrf_token %}
{{ form.as_p }}
<button type="submit">Send</button>
</form>
{{ form.as_p }} renders each field wrapped in a <p> tag.
{% csrf_token %} protects against Cross-Site Request Forgery.
🔁 5. ModelForm Example
Use ModelForm when the form fields directly relate to a database model.
# models.py
from django.db import models
class Feedback(models.Model):
name = models.CharField(max_length=100)
comments = models.TextField()
# forms.py
from django.forms import ModelForm
from .models import Feedback
class FeedbackForm(ModelForm):
class Meta:
model = Feedback
fields = ['name', 'comments']
🧪 6. Form Validation
Django automatically validates required fields and data types. You can also write custom validation:
def clean_email(self):
email = self.cleaned_data['email']
if not email.endswith('@example.com'):
raise forms.ValidationError("Only @example.com emails are allowed.")
return email
🔚 Conclusion
Django’s form system makes it easy to:
Build and display forms
Validate and clean user input
Bind form data to models using ModelForms
Learn Fullstack Python Training Course
Read More:
Django REST Framework Tutorial
PostgreSQL Integration with Django
Visit Quality Thought Training Institute
Comments
Post a Comment