How to Validate and Compare Data against the Database in DetailView - Django - django

Question

I have a ChallengeDetailView which shows the details of a challenge like a blog post. I also have a form field on the same page and it supposed to get an answer of a challenge, and compare it to the database. So far here is what I did;
class ChallengeDetailView(DetailView):
model = Challenge
def get_context_data(self, **kwargs):
context = super(ChallengeDetailView, self).get_context_data(**kwargs)
context['form'] = FlagForm
return context
from django import forms
class FlagForm(forms.Form):
flag = forms.CharField(label='Challenge Flag',required=True)
class FlagFormView(FormView):
form_class = FlagForm
success_url = reverse_lazy('challenge-detail')
I try to implement a simple logic like the following;
def get_flag(self, request):
if self.request.method == 'POST':
form = FlagForm(request.POST)
if form.is_valid():
flag = form.cleaned_data.get('flag')
if flag == Challenge.flag:
return messages.success("You found the flag!")
else:
return FlagForm()
I tried to include this in form_valid() method but couldn't make it work in the ChallengeDetailView. I'm open to any kind of suggestions. I'm coming from a Symfony background and pretty new to Django.

Answer 1

Finally I was able to figure it out.
I created a regular form in forms.py
from django import forms
class FlagForm(forms.Form):
flag = forms.CharField()
In views.py I have a detail view and form view with SingleObjectMixin to work on the current post.
class ChallengeDisplay(DetailView):
model = Challenge
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context['form'] = FlagForm()
return context
Form view with SingleObjectMixin;
class ChallengeFormEntry(SingleObjectMixin, FormView):
template_name = 'ctf/challenge_detail.html'
form_class = FlagForm
model = Challenge
def post(self, request, *args, **kwargs):
if request.method == 'POST':
form = FlagForm(request.POST)
if form.is_valid():
flag = form.cleaned_data.get('flag')
if self.get_object().flag == flag:
messages.success(request, 'good job!')
else: messages.warning(request, 'Try again!')
form = FlagForm()
return super().post(request, *args, **kwargs)
def get_success_url(self):
return reverse('challenge-detail', kwargs={'pk': self.get_object().pk, 'slug':self.get_object().slug})