How to estabalish ManyToMany relationship on instantiation of object through generic CreateView? - django

Question

So I have two models. Deck and Card. When the user creates card it should be tied to a deck, in a ManyToMany relationship.
The card is created through the Generic Django create view, and I can't crack how I can assign the card to a deck, in this context. Any ideas on how I might solve this?
My CreateView
class CardCreateView(LoginRequiredMixin, CreateView):
model = Card
fields = ['question', 'answer']
def form_valid(self, form):
form.instance.creator = self.request.user
return super().form_valid(form)
def get_success_url(self):
return reverse('spaced_repitition-home')
def assign_card(self, deck_id): #It's here I don't get why it doesn't work
card = self.get_object()
deck = get_object_or_404(Deck, pk=deck_id)
card.decks.add(deck)
card.save()
Template that sends user to form (passes on deck_id)
{% for deck in decks reversed %}
<a href="{% url 'card-create' deck_id=deck.id %}">
<p> Add Card </>
{% endfor %}
Form Template
{% extends "spaced_repitition/base.html" %}
{% load crispy_forms_tags %}
{% block content %}
<div class="content-section">
<form method="POST">
{% csrf_token %}
<fieldset class=form-group>
<legend class="borders-bottom mb-4"> Create Card </legend>
{{ form|crispy }}
<div class=form-group>
<button class= "btn btn-outline-info" type="submit"> Create </button>
</div>
</fieldset>
</form>
{% endblock content %}
Models
class Deck(models.Model):
title = models.CharField(max_length=100)
date = models.DateTimeField(default=timezone.now)
creator = models.ForeignKey(User, on_delete=models.CASCADE)
description = models.TextField(max_length=200, blank=True)
def __str__(self):
return self.title
class Card(models.Model):
question = models.CharField(max_length=100)
answer = models.TextField()
date = models.DateTimeField(default=timezone.now)
creator = models.ForeignKey(User, on_delete=models.CASCADE)
decks = models.ManyToManyField(Deck)
days_till_study = models.IntegerField(default=1)
def __str__(self):
return self.question + ' pk: ' + str(self.pk)
Url
path('card/new/<int:deck_id>/', CardCreateView.as_view(), name='card-create'),
Thanks for reading this.
Edit
Found the solution here:
Django Createview default value for a foreign key field