Question

我使用自己的模型浏览了drf网站的快速入门教程，其中包含许多m2m和foreignkey关系。我的一些m2m关系通过使用'self'来指代相同的模型。现在，当我查看我的api以获取那些m2m和外键关系时，我只看到了id号而不是其他信息。如何更改此信息以包含有用信息？另外，如何限制信息的显示深度？我觉得如果我能获得除id之外的其他信息，m2m关系可以永远持续下去。

无论如何，这里是我现在可以看到的片段：我希望外观和relatives_many显示模型的json，或者至少只显示除id之外的名称字段。谢谢你的帮助！

{
    "id": 97, 
    "name": "Ancient Sleeping Magi of Life Giving's mother", 
    "full_name": "Ancient Sleeping Magi of Life Giving's mother", 
    "sex": "Female", 
    "link": "http://adventuretime.wikia.com/wiki/Ancient_Sleeping_Magi_of_Life_Giving%27s_mother", 
    "image": "http://img2.wikia.nocookie.net/__cb20130408224627/adventuretimewithfinnandjake/images/0/0b/Magi%27s_parents1.png", 
    "species": [], 
    "appearance": [
        245
    ], 
    "relatives_many": [
        96, 
        92, 
        94, 
        705
    ]
},

我的部分模特。

class Episode(models.Model):
    title = models.CharField(max_length=80)
    description = models.TextField(blank=True)
    season_number = models.PositiveSmallIntegerField(blank=True, null=True)
    episode_number = models.PositiveSmallIntegerField(blank=True, null=True)

    def __unicode__(self):
        return u"{}".format(self.title)

class Character(models.Model):
    name = models.CharField(max_length=80)
    full_name = models.CharField(max_length=120)
    sex = models.CharField(max_length=100, blank=True)
    species = models.ManyToManyField(Species, related_name="characters", blank=True)
    link = models.URLField(blank=True)
    appearance = models.ManyToManyField(Episode, related_name="characters", blank=True)
    image = models.URLField(blank=True)
    relatives_many = models.ManyToManyField('self', related_name="characters", blank=True)

    def __unicode__(self):
        return u"{}".format(self.name)

串行器。我已经尝试设置fields =（“something”，....）但这并没有改变id的显示方式。

class CharacterSerializer(serializers.ModelSerializer):
    class Meta:
        model = Character

class SpeciesSerializer(serializers.ModelSerializer):
    class Meta:
        model = Species

视图。

class CharacterViewSet(viewsets.ModelViewSet):
    queryset = Character.objects.all()
    serializer_class = CharacterSerializer

class SpeciesViewSet(viewsets.ModelViewSet):
    queryset = Species.objects.all()
    serializer_class = SpeciesSerializer

编辑按照sax的建议，我明白了：

 {
    "relatives": [
        {
            "id": 38, 
            "name": "Ice King", 
            "full_name": "Ice King", 
            "sex": "Male", 
            "link": "http://adventuretime.wikia.com/wiki/Ice_King", 
            "image": "http://img3.wikia.nocookie.net/__cb20120921153231/adventuretimewithfinnandjake/images/6/64/Original_Ice_King.png", 
            "species": [
                10, 
                12, 
                14
            ], 
            "appearance": [
                42,
                23

            ]
        }
    ], 
    "id": 42, 
    "name": "Princess Monster Wife", 
    "full_name": "", 
    "sex": "", 
    "link": "", 
    "image": "", 
    "species": [], 
    "appearance": []
},

Answer 1

试试这个，它没有经过测试，但类似的代码对我有用：

 class ChildCharacterSerializer(serializers.ModelSerializer):
    class Meta:
         model = Character
         exclude = ('relatives_many',)   


 class CharacterSerializer(serializers.ModelSerializer):
    relatives = serializers.SerializerMethodField('get_relatives')

    class Meta:
         model = Character

    def get_relatives(self, character):
        qs = character.characters.all()
        serializer = ChildCharacterSerializer(instance=qs, 
                                              many=True, context=self.context)
        return serializer.data

或者如果您不需要特殊过滤器：

 class CharacterSerializer(serializers.ModelSerializer):
    relatives_many = ChildCharacterSerializer()

django rest framework：如何在id之外显示m2m和foreignkey字段？

1 个答案: