Django - Local Variable 'form' Referenced Before Assignment

I'm trying to make a form get information from the user and use this information to send a email. Here's my code: #forms.py from django import forms class ContactForm(forms.Form):

Solution 1:

You define the form variable in this if request.method == 'POST': block. If you access the view with a GET request form gets not defined. You should change the view to something like this:

def contato(request):
    form_class = ContactForm
    # if request is not post, initialize an empty form
    form = form_class(request.POST or None)
    if request.method == 'POST':

        if form.is_valid():
            nome = request.POST.get('nome')
            email = request.POST.get('email')
            msg = request.POST.get('msg')

            send_mail('Subject here', msg, email, ['testmail@gmail.com'], fail_silently=False)
            return HttpResponseRedirect('blog/inicio')
    return render(request, 'blog/inicio.html', {'form': form})

Solution 2:

The Django docs handle this, but slightly differently from the other answers. See https://docs.djangoproject.com/en/dev/topics/forms/#using-a-form-in-a-view

Using an else, if the request is not POST then create the blank form. The below is pasted directly from the docs.

def get_name(request):
    # if this is a POST request we need to process the form data
    if request.method == 'POST':
        # create a form instance and populate it with data from the request:
        form = NameForm(request.POST)
        # check whether it's valid:
        if form.is_valid():
            # process the data in form.cleaned_data as required
            # ...
            # redirect to a new URL:
            return HttpResponseRedirect('/thanks/')

    # if a GET (or any other method) we'll create a blank form
    else:
        form = NameForm()

    return render(request, 'name.html', {'form': form})

Solution 3:

If there can be so to say - collateral damage by initializing an empty form , then you may also provide a dummy value as a filler , till the request.POST is initialized ...

def contato(request):
    form = "Dummy String"
    form_class = ContactForm

    # if request is not post, initialize an empty form
    #form = form_class(request.POST or None) # Maybe Not 

    form = form_class(request.POST) # Instead 
    if request.method == 'POST':
        if form.is_valid():
            nome = request.POST.get('nome')
            email = request.POST.get('email')
            msg = request.POST.get('msg')

            send_mail('Subject here', msg, email, ['testmail@gmail.com'], fail_silently=False)
            return HttpResponseRedirect('blog/inicio')
    return render(request, 'blog/inicio.html', {'form': form})

Solution 4:

The only issue you have is you did not declare ContactForm as function, change FROM this;

def contato(request):
    form_class = ContactForm
    if request.method == 'POST':

TO;

def contato(request):
    form_class = ContactForm()
    if request.method == 'POST':