Check Email Validation Django - django

Question

Can someone explain how to validate an email adress in Django?
So for Example i want to check if an email is a valid college email adress with the ending .edu .
How can i do that?
from django import forms
from .models import SignUp
class SignUpForm(forms.ModelForm):
class Meta:
model = SignUp
fields = ['full_name','email']
def clean_email(self):
email = self.cleaned_data.get('email')
return email

Answer 1

Assuming that your SignUp.email field is an EmailField, Django will take care of validating that it's a valid email address. All you need to do is check that it ends in .edu, and raise a ValidationError if it doesn't.
class SignUpForm(forms.ModelForm):
class Meta:
model = SignUp
fields = ['full_name','email']
def clean_email(self):
email = self.cleaned_data.get('email')
if not email.endswith('.edu'):
raise forms.ValidationError("Only .edu email addresses allowed")
return email
If might be better to create a validator and add it to your model field. This way, Django will run your validator when you use your SignUpForm and when it does model validation in other places like the Django admin.
from django.core.exceptions import ValidationError
def validate_edu_email_address(value):
if email.endswith('.edu'):
raise forms.ValidationError("Only .edu email addresses allowed")
class SignUp(models.Model):
email = models.EmailField(validators=[validate_edu_email_address])
...

Answer 2

Just create a regular expression for your needs, or even better use some standard one.
import re
EMAIL_REGEX = r"(^[a-zA-Z0-9_.+-]+#[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)"
# EMAIL_REGEX = r'\w+#\.edu' # If you only want to allow edu.
class SignUpForm(forms.ModelForm):
...
def clean_email(self):
email = self.cleaned_data.get('email')
if email and not re.match(EMAIL_REGEX, email):
raise forms.ValidationError('Invalid email format')
return email
In fact, even better approach would be to use EmailField as #Alasdair suggested, that would automatically ensures the same for you (unless you really need to limit the email addresses to your custom format).