petition-sonnette/petition/views.py

from django.shortcuts import render
from .models import Signature
from .forms import SignatureForm


def view_petition(req):
    just_signed = False
    just_error = False

    signers = Signature.objects.all()

    if req.method == 'POST':
        form = SignatureForm(req.POST)
        if form.is_valid():
            if len(signers) < 5000:
                form.save()
            just_signed = True
        else:
            just_error = True

    if just_signed:
        signers = Signature.objects.all()

    context = {
        'form': SignatureForm(),
        'just_signed': just_signed,
        'just_error': just_error,
        'num_signers': len(signers),
        'signers': signers,
    }

    return render(req, 'petition/petition.html', context)