Django Update Post

from django import formsclass updateForm(forms.Form):    title = forms.CharField()    body = forms.CharField()

from .models import Postfrom .forms import updateFormdef posteditpage(request, pk):    if request.method == 'POST':        form = updateForm()        title = request.POST['title']        body = request.POST['body']        post = Post.objects.get(id=pk)        post.title = title        post.body = body        post.save()        return redirect('/post/' + str(pk))    else:        form = updateForm()    return render(request, 'app/update-post.html', {'form': form})

from django.urls import pathfrom . import viewsurlpatterns = [    path('update/<int:pk>',views.posteditpage,name='post-edit'),]

{% block content %}    <form method="POST">    {% csrf_token %}        {{ form|crispy }}    <button type="submit">UPDATE</button>    </form>{% endblock %}