Updating a review

Let's look at the steps to do this:

1. We create a URL path to update a review in /movie/urls.py:

   …
   urlpatterns = [
       path('<int:movie_id>', views.detail, 
         name='detail'),
       path('<int:movie_id>/create', views.createreview, 
            name='createreview'),
       path('review/<int:review_id>', views.updatereview, 
            name='updatereview'),
   ]

The path takes in the review ID (the review's primary key) – for example, http://localhost:8000/movie/review/2.

2. In /movie/views.py, we then add def updatereview:

   …
   def updatereview(request, review_id):
       review = get_object_or_404(
         Review,pk=review_id,user...