python - 带 FK 的 DRF POST 对象

Question

首先，我的模型:

class Director(models.Model):
    first_name = models.CharField(max_length=100)
    last_name = models.CharField(max_length=100)

class Movie(models.Model):
    title = models.CharField(max_length=150, unique=True)
    director = models.ForeignKey(Director, related_name="movies")

我想发布 json 文件来创建导演、导演和电影(一次)或电影。

所以，这是我的序列化程序:

class MovieSerializer(serializers.ModelSerializer):
    id = serializers.IntegerField(read_only=True)
    url = HyperlinkedIdentityField(view_name='movie')
    class Meta:
        model = Movie
        exclude = ('director', )  # edit (solution) this line is the problem. It does not only affect the representation... Just remove that and it's OK


class DirectorSerializer(serializers.ModelSerializer):
    movies = MovieSerializer(many=True)

    class Meta:
        model = Director
        fields = '__all__'


    def create(self, validated_data):
        movies = validated_data.pop('movies')
        director = self.Meta.model.objects.create(**validated_data)

        for movie in movies:
            Movie.objects.create(director=director, **movie)

        return director

所以，(感谢 httpie)，创建一个新的导演:

{
    "first_name": "Christopher",
    "last_name": "Nolan",
    "movies": []
}

工作正常。用电影创建新导演:

{
    "first_name": "Luc",
    "last_name": "Besson",
    "movies": [
        {
            "title": "Le Grand Bleu"
        }
    ]
}

也可以。但是我无法添加新电影即创建新电影。JSON:

{
    "title": "Interstellar",
    "director": 1
}

director's id = 1 => C. Nolan ;-)

我想我遗漏了一些东西，所以如果有人可以帮助我、给我建议或其他什么？

谢谢，问候

编辑问题是:

要将“星际穿越”电影添加到 Nolan 的电影 (id_director=1)，我必须 POST 什么 JSON 文件？

Answer 1

您无法在此处添加新电影，因为您已在 MovieSerializer 中排除了 director 字段。但是电影模型需要 director 字段。删除排除应该有效