How can I raise an error in my Django form? - php

Question

I have a PHP script in a server that returns {"available":true} or {"available":false}, depending on whether the email address is available or not. Here is the code:
<?php
$servername = "localhost";
$username = "root";
$password = "mysqlpass";
$dbname = "testdb";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT username FROM testtable";
$result = $conn->query($sql);
$query = $_GET['query'].'#groupdesignace.com';
$arr = array();
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
$arr[] = $row['username'];
}
if (in_array($query, $arr)) {
$output = array('available' => false);
echo json_encode($output);
} else {
$output = array('available' => true);
echo json_encode($output);
}
} else {
echo "0 results";
}
$conn->close();
?>
On a different server where users are requesting their email address through a form, I am using Django. I have written the following code to check whether the email is available, if not, it should raise an error. Here is the code:
class RequestEmailAddressForm(forms.Form):
email = forms.CharField(label='Email', max_length=100)
password = forms.CharField(widget=forms.PasswordInput)
def clean_email(self):
email = self.cleaned_data.get('email')
if email:
import requests
payload = {'query': email}
r = requests.get('http://172.16.16.172/check_email.php', params=payload)
result = r.json()
print r.url
status = result['available']
if status == False:
raise forms.ValidationError('This login name is unavailable!')
return email
Here is my view that is handling the form:
def request_email_address(request):
if request.method == "POST":
form = RequestEmailAddressForm(request.POST)
if form.is_valid():
data = form.cleaned_data
# do something here
else:
pass
return HttpResponseRedirect('/core/home/')
else:
form = RequestEmailAddressForm()
return render(request, "core/request_email_address.html", { "form": form })
However, the form is going to the submitted page but it is not raising validation error. What am I doing wrong?

Answer 1

You are doing nothing on if form is invalid. When ValidationError is raised django sets form.errors dict with data about what went wrong during validation. Read more https://docs.djangoproject.com/en/1.10/ref/forms/validation/
def request_email_address(request):
if request.method == "POST":
form = RequestEmailAddressForm(request.POST)
if form.is_valid(): # <- form validation is called on this line
data = form.cleaned_data
# do something here
# do redirect here
return HttpResponseRedirect('/core/home/')
else:
pass
else:
form = RequestEmailAddressForm()
return render(request, "core/request_email_address.html", { "form": form })