Django REST Framework 图片上传

Question

我有型号产品：

def productFile(instance, filename):
    return '/'.join( ['products', str(instance.id), filename] )

class Product(models.Model):
    ...

    image = models.ImageField(
        upload_to=productFile,
        max_length=254, blank=True, null=True
    )
    ...

然后我有序列化器：

class ProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = Product
        fields = (
            ...
            'image',
            ...
        )

然后我有意见：

class ProductViewSet(BaseViewSet, viewsets.ModelViewSet):
    queryset = Product.objects.all()
    serializer_class = ProductSerializer

如何使用 Postman 上传图片？将图像上传到模型的最佳做法是什么？谢谢。

Answer 1

你可以创建单独的端点来上传图片，就像这样：

class ProductViewSet(BaseViewSet, viewsets.ModelViewSet):
    queryset = Product.objects.all()
    serializer_class = ProductSerializer

    @detail_route(methods=['post'])
    def upload_docs(request):
        try:
            file = request.data['file']
        except KeyError:
            raise ParseError('Request has no resource file attached')
        product = Product.objects.create(image=file, ....)

你可以解决这个问题

-- 更新：这是从邮递员上传的方法

Answer 2

我最近启动了 Django 并且在上传图片时遇到了同样的问题。

我完成的所有步骤

安装 Pillow 以使用 ImageField
```
pip install Pillow
```

在Settings.py中添加这些行

MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
MEDIA_URL = '/media/' # 'http://myhost:port/media/'

使用 model.py 中的 ImageField（创建 nameFile 函数以创建文件夹和文件名）

def nameFile(instance, filename):
    return '/'.join(['images', str(instance.name), filename])

class UploadImageTest(models.Model):
    name = models.CharField(max_length=100)
    image = models.ImageField(upload_to=nameFile, blank=True, null=True)

serializer.py

class ImageSerializer(serializers.ModelSerializer):
    class Meta:
        model = UploadImageTest
        fields = ('name', 'image')

views.py

class ImageViewSet(ListAPIView):
    queryset = UploadImageTest.objects.all()
    serializer_class = ImageSerializer

    def post(self, request, *args, **kwargs):
        file = request.data['file']
        image = UploadImageTest.objects.create(image=file)
        return HttpResponse(json.dumps({'message': "Uploaded"}), status=200)

urls.py: 添加这一行

path('upload/', views.ImageViewSet.as_view(), name='upload'),

admin.py：添加这一行（用于管理员检查）
```
admin.site.register(UploadImageTest)
```

在终端

python manage.py makemigrations
python manage.py migrate

Answer 3

models.py

from django.db import models

class ImageUpload(models.Model):
    title = models.CharField(max_length=50)
    images = models.ImageField('images')

serializers.py

from rest_framework import serializers
from .models import ImageUpload

class ImageUploadSerializer(serializers.HyperlinkedModelSerializer):

    class Meta:
        model = ImageUpload
        fields= (
            'title',
            'images'
        )

views.py

from rest_framework import viewsets
from .models import ImageUpload
from .serializers import ImageUploadSerializer

class ImageUploadViewSet(viewsets.ModelViewSet):
    queryset = ImageUpload.objects.all()
    serializer_class = ImageUploadSerializer

urls.py

from django.urls import path, include
from rest_framework.routers import DefaultRouter
from . import views

router = DefaultRouter()
router.register(r'imageupload', views.ImageUploadViewSet)

urlpatterns = [
    path('imageupload', include(router.urls)),
]

Answer 4

这对我有用

class UserAvatarUpload(ListAPIView):
    
    parser_classes = [MultiPartParser, FormParser]
    serializer_class = ImageSerializer

    def post(self, request, *args, **kwargs):
        username = request.data['username']
        file = request.data['image']
        user = MyModel.objects.get(username=username)
        user.image = file
        user.save()
        return Response("Image updated!", status=status.HTTP_200_OK)

Django REST Framework 图片上传

Django REST Framework image upload

django

image-upload

django-rest-framework

这对我有用