我有一个模型，它有带图像域的外键，因为我有多个图像，我可以像这样将它们放在一个列表中：

Question

模型.py

class Cat_Breed_Detail(models.Model):
    id = models.AutoField(primary_key=True,verbose_name="id")
    key_name = models.CharField(max_length=35,default='',null=True,verbose_name="key_name")
    display_name= models.CharField(max_length=35,default='',null=True,verbose_name="display_name")
    def __str__(self):
        return self.key_name


class Cat_Image(models.Model):
    image=models.ImageField(upload_to="ImagesCat/")
    cat=models.ForeignKey(Cat_Breed_Detail,on_delete=models.CASCADE,null=True,related_name='images')
    def image_preview(self):
        if self.image:
            return mark_safe('<img src="{0}" width="150" height="150" />'.format(self.image.url))
        else:
            return '(No image)'

序列化器.py

class CatImageSerializer(serializers.ModelSerializer):
    class Meta:
        model = Cat_Image
        fields = '__all__'
 
class CatDataSerializer(serializers.ModelSerializer):
    class Meta:
        model = Cat_Breed_Detail
        fields = ['id','key_name','display_name','images']

查看.py

    class CatListCreate(ListAPIView):
    queryset = CatBreedDetails.objects.all().order_by('key_name')
    serializer_class = CatDataSerializer
    pagination_class = CustomPagination 

响应我到了这里我得到了嵌套的响应我不想要它我只想要图像中的图像 url 作为列表而不像我目前得到的响应：

{
            "id": 9,
            "key_name": "abyssinian",
            "display_name": "Abyssinian",
            "image": [
                {
                    "id": 3,
                    "image": "/media/Abyssinian_0006.jpg",
                    "cat": 9
                },
                {
                    "id": 4,
                    "image": "/media/Abyssinian_0092.jpg",
                    "cat": 9
                }
            ]
        },
        {
            "id": 18,
            "key_name": "american_bobtail",
            "display_name": "American Bobtail",
            "image": [
                {
                    "id": 5,
                    "image": "/media/American_Bobtail_0004.jpg",
                    "cat": 18
                },
                {
                    "id": 6,
                    "image": "/media/American_Bobtail_0057.png",
                    "cat": 18
                }
            ]
        },
        {
            "id": 19,
            "key_name": "american_curl",
            "display_name": "American Curl",
            "image": [
                {
                    "id": 7,
                    "image": "/media/American_Curl_0078.jpg",
                    "cat": 19
                },
                {
                    "id": 8,
                    "image": "/media/American_Curl_0083.png",
                    "cat": 19
                }
            ]
        }

我想在一个列表中获取所有图像，而不是像 image:{image:"...." ,image:"......"} 我是 djnago 的新手，仍在学习是否有任何方法可以完成它。 有什么办法可以让我得到这样的回应：

{
            "id": 9,
            "key_name": "abyssinian",
            "display_name": "Abyssinian",
            "image":  ["/media/Abyssinian_0006.jpg","/media/Abyssinian_0092.jpg",]
                  
        }

Answer 1

[
    {
        "id": 1,
        "key_name": "first cat",
        "display_name": "first cat",
        "images": [
            {
                "image": "http://localhost:8000/ImagesCat/Screenshot_from_2022-12-21_18-16-28.png"
            },
            {
                "image": "http://localhost:8000/ImagesCat/Screenshot_from_2022-12-29_13-41-31.png"
            }
        ]
    }
]

这就是我得到回应的方式，如果你想像你一样，那么你必须重写列表方法

from rest_framework import serializers

from app.models import Cat_Image, Cat_Breed_Detail


class CatImageSerializer(serializers.ModelSerializer):
    class Meta:
        model = Cat_Image
        fields = '__all__'


class CatImageSerializer2(serializers.ModelSerializer):
    class Meta:
        model = Cat_Image
        fields = ['image']


class CatDataSerializer(serializers.ModelSerializer):
    images = CatImageSerializer2(read_only=True, many=True)

    class Meta:
        model = Cat_Breed_Detail
        fields = ['id', 'key_name', 'display_name', 'images']