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):
nome = forms.CharField(required=True)
email = forms.EmailField(required=True)
msg = forms.CharField(
required=True,
widget=forms.Textarea
)
#views.py
from django.shortcuts import render, redirect, get_object_or_404, HttpResponseRedirect, render_to_response
from django.core.mail import send_mail
from .forms import ContactForm
def contato(request):
form_class = ContactForm
if request.method == 'POST':
form = form_class(request.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, ['[email protected]'], fail_silently=False)
return HttpResponseRedirect('blog/inicio')
return render(request, 'blog/inicio.html', {'form': form})
#contato.html
{% extends "blog/base.html" %}
{% block content %}
<form role="form" action="" method="post">
{% csrf_token %}
{{ form.as_p }}
<button type="submit">Submit</button>
</form>
{% endblock %}
and when I try to enter in contact page I get this error:
local variable 'form' referenced before assignment
It is saying tha the error is in this line of views.py:
return render(request, 'blog/inicio.html', {'form': form})
I'm a little new on Django, can you please help me?
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, ['[email protected]'], 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})