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Using Default UserCreationForm does not show error if the passwords do not match

September 14, 2022

Using Default UserCreationForm from django.contrib.auth.forms does not show error if the passwords do not match. I do not want to create a custom model.

Here is the code from my views.py file

from django.contrib.auth.forms import UserCreationForm
from django.shortcuts import render

# Create your views here.
def register(response):
    if response.method == "POST":
        print(response.POST)
        form = UserCreationForm(response.POST)
        if form.is_valid():
            form.save()
        else:
            print(form.errors)

    form = UserCreationForm()
    return render(response,"register/register.html",{"form":form})

<html> 
    <head>
        <title>Register </title>    
    </head>
    <body> 
        <h1>This is the Registration page</h1>
        <form method="post">
            {% csrf_token %}
            {{form.as_p}}
            <button type="submit">Submit</button>
        </form>
    </body>
</html>

I thought the message would be automatically displayed. Am I missing something?
Edit: None of the error message are being displayed like password length < 8, all numeric passwords, etc.

>Solution :

You each time create a new form, you should render the one that is invalid:

from django.shortcuts import redirect


def register(response):
    if response.method == 'POST':
        form = UserCreationForm(response.POST)
        if form.is_valid():
            form.save()
            return redirect('name-of-some-view')
    else:
        form = UserCreationForm()  # 🖘 only for a GET request
    return render(response, 'register/register.html', {'form': form})

Note: In case of a successful POST request, you should make a redirect
^[Django-doc]
to implement the Post/Redirect/Get pattern ^[wiki].
This avoids that you make the same POST request when the user refreshes the
browser.