Python 测试图像场

我想测试我的视图，但我不知道如何在请求中发送图像。我的意思是，我有这样的模型：

class Item(models.Model):
    text = models.CharField(max_length=255)
    image = models.ImageField()

我有序列化程序：

class RecieverSerializer(UserSerializer):
    class Meta():
        fields = ('id', 'email')
        extra_kwargs = {
            'username' : {'validators':[]}
        }

class ItemSerializer(serialisers.ModelSerializer):
    reciever = RecieverSerializer(many=True)
    class Meta():
        model = Item
        fields = ('text', 'image')

视图：

如何将数据发送到服务器？如果我尝试json：

{ 
    "text": "123456",
    "reciever":[
        {"id":1, "email":"qwe@qwe.qwe"},
        {"id":2, "email":"asd@asd.asd"}
     ],
    "image" : http://someurl.com/way/image.jpg
}

Rest框架返回：

JSON解析错误-无法解码任何JSON对象，
像这样编辑
ItemSerializer

class ItemSerializer(serialisers.ModelSerializer):
    reciever = RecieverSerializer(many=True)
    image_url = serializers.SerializerMethodField(source='get_image_url')

    class Meta():
        model = Item
        fields = ('text', 'image')

    def get_image_url(self, obj):
        if obj.image:
            return self.context['request'].build_absolute_uri(obj.image.url) 

图像url是否缺少一些引号？您可以尝试将路径
way/image.jpg
传递到图像字段，django将尝试连接媒体URL或媒体根+图像字段路径
class ItemSerializer(serialisers.ModelSerializer):
    reciever = RecieverSerializer(many=True)
    image_url = serializers.SerializerMethodField(source='get_image_url')

    class Meta():
        model = Item
        fields = ('text', 'image')

    def get_image_url(self, obj):
        if obj.image:
            return self.context['request'].build_absolute_uri(obj.image.url)