Django form is throwing error: "takes exactly 1 argument (0 given)"

Question

I'm working on a basic event form created from a model, but I keep getting the following error message:

TypeError at /addlaundry/
addlaundry() takes exactly 1 argument (0 given)

I think it's because I'm not passing the argument through on views, but I can't find documented anywhere how to do this right, at least not written in a way I understand.

Here is my urls.py:

urlpatterns = patterns('',
    url('^addlaundry/$', 'beacon.laundry.views.addlaundry'),
}

And the views itself:

# Create your views here.

from schedule.views import EventForm

def addlaundry(request):
    if request.method == 'POST':
        form = EventForm(request.POST)
        if form.is_valid():
            return HttpResponseRedirect('/thanks/') #redirect after succesfully adding new delivery
    else:
     form = addlaundry()

    return render_to_response('newlaundry.html', {
        'form': form,
    })

Do I indeed have my views wrongly structured, or am I missing something else? If there's documentation I need to read up on, I want to I just haven't found it but feel like I'm missing something basic.

Thanks,

Michael

Answer 1

Your view is called addlaundry, and it calls (presumably) something else called addlaundry. Rename one of them, or use the other addlaundry from inside its namespace.

Answer 2

The problem is here:

form = addlaundry()

You're calling your view function addlaundry which takes 1 required argument (request), but you're not passing it any arguments.

Of course, that's not the right way to construct a form, anyway. You'll want to take a look at the examples given in the Django forms documentation to see how to create and use forms in Django.

Answer 3

This is your problem:

 form = addlaundry()

That's attempting to call the view itself! That's not what you want. You need to define a form class and call (instantiate) it here.

Answer 4

else:
 form = addlaundry()

Just as the exception says: The view function needs 1 argument, but you didn't supply any.

Answer 5

views.py :

from schedule.forms import EventForm

def addlaundry(request):
    if request.method == 'POST':
        form = EventForm(request.POST)
        if form.is_valid():
            return HttpResponseRedirect('/thanks/')
    else:
        form = EventForm()

    return render_to_response('newlaundry.html', {
        'form': form,
    })

That means :

• using a forms.py file to define your forms
• initializing your form in a non post context (regular first page load), that will be passed to your template

Answer 6

Also, in urls.py your view should not be a string.