在Django ImageField中上傳圖片

Question

我嘗試使用ImageField測試我的模型，為此，我正在以二進制模式讀取.jpg文件並保存在模型中。 我在StackOverflow中發現了很多問題，但似乎對我沒有任何幫助。

testImagePath = os.path.join(settings.BASE_DIR, 'test_image_folder/test_image.jpg')

"image" : SimpleUploadedFile(name='test_image.jpg', content=open(testImagePath, 'rb').read(), content_type='image/jpeg')

錯誤：

UnicodeDecodeError：“ utf-8”編解碼器無法解碼位置0的字節0xff：無效的起始字節

test.py

class Test(TestCase):

    testUser = {
           "username": "TestUser",
           "email": "TestUser@mail.com",
           "password": "TestUserPassword",
           "confirm_password": "TestUserPassword"
        }
    testAlbum = {
            "owner" : testUser['username'],
            "name" : "Test Album"
        }
    testImagePath = os.path.join(settings.BASE_DIR, 'test_image_folder/test_image.jpg')
    testPhoto = {
            "owner" : testUser['username'],
            "album" : testAlbum['name'],
            "name" : "Test Photo",
            "image" : SimpleUploadedFile(name='test_image.jpg', content=open(testImagePath, 'rb').read(), content_type='image/jpeg')
        }
    def setUp(self):
        self.client = APIClient()
        self.registerTestUser()
...

    def test_photos_urls(self):
        response = self.client.post('/api/photos/', self.testPhoto, format="json")
        self.assertEqual(response.status_code, status.HTTP_201_CREATED, msg=response.content)

串行：

class PhotoSerializer(serializers.HyperlinkedModelSerializer):
    album = serializers.HyperlinkedRelatedField(view_name='album-detail', queryset=Album.objects)
    owner = serializers.ReadOnlyField(source='owner.username')

    class Meta:
        model = Photo
        fields = ('pk', 'name', 'image', 'creation_date', 'owner', 'album',)
        read_only_fields=('creation_date',)

視圖：

class PhotoViewSet(viewsets.ModelViewSet):
    queryset = Photo.objects.all()
    serializer_class = PhotoSerializer 
    permission_classes = (permissions.IsAuthenticatedOrReadOnly, IsOwnerOrReadOnly,)

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)

模型：

class Photo(models.Model):
    album = models.ForeignKey(Album, related_name='photos', on_delete=models.CASCADE)
    owner = models.ForeignKey(User,  related_name='user_photos', on_delete=models.CASCADE)
    name = models.CharField(max_length=80, default='New photo')
    image = models.ImageField(name, upload_to=get_image_path)
    creation_date = models.DateField(auto_now_add=True)

    def __str__(self):
        return self.name

    class Meta:
        ordering = ['creation_date', ]

完全回溯錯誤：

追溯（最近一次通話）：文件“ D：\\ code \\ active \\ Python \\ Django \\ photo-hub \\ photo-hub \\ api \\ tests.py”，行66，位於test_photos_urls response = self.client.post（' / api / photos /'，self.testPhoto，format =“ json”）文件“ C：\\ Users \\ User \\ AppData \\ Local \\ Programs \\ Python \\ Python35-32 \\ lib \\ site-packages \\ rest_framework \\ test.py” ，第172行，在發布路徑中，data = data，format = format，content_type = content_type，** extra）文件“ C：\\ Users \\ User \\ AppData \\ Local \\ Programs \\ Python \\ Python35-32 \\ lib \\ site-packages \\ rest_framework \\ test.py“，第93行，在發布數據中，content_type = self._encode_data（數據，格式，content_type）文件“ C：\\ Users \\ User \\ AppData \\ Local \\ Programs \\ Python \\ Python35-32 \\ lib \\ _encode_data中的site-packages \\ rest_framework \\ test.py“行65 ret = renderer.render（data）文件” C：\\ Users \\ User \\ AppData \\ Local \\ Programs \\ Python \\ Python \\ Python35-32 \\ lib \\ site-packages渲染分隔符=分隔符中的\\ rest_framework \\ renderers.py“行103，轉儲中的文件” C：\\ Users \\ User \\ AppData \\ Local \\ Programs \\ Python \\ Python35-32 \\ lib \\ json__init __。py“，行237 s ** kw）.encode（obj）文件“ C：\\ Users \\ User \\ AppData \\ Local \\ Programs \\ Python \\ Python35-32 \\ lib \\ json \\ encoder.py”，行198，在編碼塊中= self.iterencode （o，_one_shot = True）文件“ C：\\ Users \\ User \\ AppData \\ Local \\ Programs \\ Python \\ Python35-32 \\ lib \\ json \\ encoder.py”，行256，以iterencode返回_iterencode（o，0）文件“ C：\\ Users \\ User \\ AppData \\ Local \\ Programs \\ Python \\ Python35-32 \\ lib \\ site-packages \\ rest_framework \\ utils \\ encoders.py”，第54行，默認返回obj.decode（'utf-8' ）UnicodeDecodeError：'utf-8'編解碼器無法解碼位置0的字節0xff：無效的起始字節

Answer 1

ImageField需要獲取文件，而不是數據。 這樣可以解決問題：

"image" : open(os.path.join(settings.BASE_DIR, 'test_image_folder/test_image.jpg'), 'rb')