Django movie and director relation. Movie is not attached to the director

I'm making a model, consisting of a movie and a director. When I create a movie, I want the movie to be automatically owned by the director I selected but it's not working.

class Movie(models.Model):
    name = models.CharField(max_length=100)
    category = models.CharField(max_length=100)
    imdb = models.DecimalField(max_digits=2, decimal_places=1)     
    director = models.ForeignKey('Director', on_delete=models.DO_NOTHING)

    class Meta:
        verbose_name_plural = 'Movies'

    def __str__(self):
        return self.name


class Director(models.Model):
    name = models.CharField(max_length=150)
    movies = models.ManyToManyField(Movie, related_name='movies', blank=True)

    class Meta:
        verbose_name_plural = 'Directors'

    def __str__(self):
        return self.name
    

I am creating a new movie using django-admin page. for instance;django-admin creating movie

However the movie is not automatically added to the director.
Director

I also want a movie to belong to only one director.
How can I do these. I will be very glad if you can help me. Thanks in advance

That's already the case without any need for an extra relation. Indeed, you define this as:

<pre><code>class Movie(models.Model):
name = models.CharField(max_length=100)
category = models.CharField(max_length=100)
imdb = models.DecimalField(max_digits=2, decimal_places=1)
director = models.ForeignKey(
'Director', on_delete=models.DO_NOTHING, <b>related_name='movies'</b>
)

class Meta:
    verbose_name_plural = 'Movies'

def __str__(self):
    return self.name

class Director(models.Model):
name = models.CharField(max_length=150)

class Meta:
    verbose_name_plural = 'Directors'

def __str__(self):
    return self.name</code></pre>

If you then assign a director <code>D₁</code> to a move <code>M₁</code>, you can query the movies of the director with:

<pre><code>D₁<b>.movies</b>.all()</code></pre>

In the modeladmin you can also display the movies when editing a Director through an inline, for example a TabularInline&nbsp;^[Django-doc]:

<pre><code>from django.contrib import admin

class <b>MovieInline</b>(admin.TabularInline):
model = Movie

@admin.register(Director)
class DirectorAdmin(admin.ModelAdmin):
# &hellip;
inlines = [
<b>MovieInline</b>,
]</code></pre>

I did as you said. I created a new movie

But It is not attached here as a list named movies

Here are my codes:
serializers.py

class MovieSerializer(serializers.ModelSerializer):

    class Meta:
        model = Movie
        fields = '__all__'
        read_only_fields = ['movie_id']


class DirectorSerializer(serializers.ModelSerializer):

    class Meta:
        model = Director
        fields = '__all__'

views.py

class DirectorListCreateAPIView(generics.ListCreateAPIView):
    queryset = Director.objects.all().order_by('id')
    serializer_class = serializers.DirectorSerializer
    permission_classes = [permissions.IsAuthenticated]
    authentication_classes = [authentication.BasicAuthentication]

    def get_queryset(self):
        queryset = Director.objects.all()
        name = self.request.query_params.get('name', None)
        if name is not None:
            queryset = queryset.filter(name=name)
        return queryset


class MovieListAPIView(generics.ListCreateAPIView):
    queryset = Movie.objects.all()
    serializer_class = serializers.MovieSerializer
    permission_classes = [permissions.IsAuthenticated]
    authentication_classes = [authentication.BasicAuthentication]
    filter_backends = [django_filters.DjangoFilterBackend, filters.OrderingFilter, filters.SearchFilter]
    filterset_fields = ['category', 'director']
    search_fields = ['category__name', 'director__name', 'name',]
    ordering_fields = ['production_year', 'imdb', 'duration']