我正在學習蟒蛇和django，我正在編寫一個類似于IMDB的項目。我正在使用python 3.8.2 64位和django 3我想顯示電影收到的最新評論，無論編寫它的用戶是誰?，F在，它顯示用戶自己的最新評論，并且在注銷用戶后，評論將保留，而不會顯示編寫它的用戶。我試圖清除緩存和歷史記錄，沒有幫助。這是模型：from django.db import modelsfrom django.contrib.auth.models import Userclass Movie(models.Model):    movie_title = models.CharField(max_length=250)    movie_poster = models.ImageField(default='default.png', blank=True)    movie_short_description = models.TextField()    director = models.CharField(max_length=250)    actor1 = models.CharField(max_length=250)    actor2 = models.CharField(max_length=250)    actor3 = models.CharField(max_length=250)    actor4 = models.CharField(max_length=250)    year = models.IntegerField()    def __str__(self):        return self.movie_title + ' - ' + str(self.year)class Review(models.Model):    movie = models.ForeignKey(Movie, on_delete=models.CASCADE)    user = models.ForeignKey(User, default = None, on_delete=models.DO_NOTHING)    score = models.IntegerField()    review_title = models.CharField(max_length=250, default="")    movie_review = models.TextField()    date = models.DateTimeField(auto_now_add=True)    class Meta:        get_latest_by = 'date'    def __str__(self):        return self.review_titleviews.pydef movie_detail(request, pk):    try:        movie  = Movie.objects.get(pk=pk)        review = Review.objects.all().latest()    except Exception as e:        print(e)    return render (request, 'movies/movie_detail.html', {'movie': movie, 'review': review})代碼：                </table>            </p>            <p>User Reviews</p>            <h3>Score: {{review.score}}  {{review.review_title}}</h3>            <h6>{{review.date}}, by {{ user.get_username }}</h6>            <p>{{review.movie_review}}</p>            <a href="{% url 'add_review' pk=movie.pk %}">Review this title</a>        </div>    </div>{% endblock %}