‘LoginUserForm’ object has no attribute ‘cleaned_data’ in Django

The error message 'LoginUserForm' object has no attribute 'cleaned_data' usually occurs when you try to access the cleaned_data attribute of a form object before calling its is_valid() method.

When a form is submitted, Django performs validation on the submitted data and stores the cleaned data in the cleaned_data attribute of the form object, if validation succeeds. However, if validation fails, the cleaned_data attribute is not set and you should not try to access it.

To fix this error, you should call the is_valid() method of the form object before accessing its cleaned_data attribute. Here’s an example:

from django.shortcuts import render
from .forms import LoginUserForm

def login_view(request):
    if request.method == 'POST':
        form = LoginUserForm(request.POST)
        if form.is_valid():
            username = form.cleaned_data['username']
            password = form.cleaned_data['password']
            # perform login
            ...
    else:
        form = LoginUserForm()
    return render(request, 'login.html', {'form': form})

In this example, we create an instance of the LoginUserForm with the POST data, and then call its is_valid() method to perform validation. If validation succeeds, we can access the cleaned_data attribute to retrieve the validated data.

If you still encounter the error after calling is_valid() method, make sure that the form fields are correctly defined in the LoginUserForm class and that the names of the fields in the form match the field names in the class. Additionally, make sure that the clean() method is defined in the form class to perform custom validation on the form data.