小编Jes*_*ica的帖子

我使用 websocket 前端（Angular）后端（Django）创建实时聊天应用程序..我想将消息存储到 db(mySql)..当我尝试将消息数组从 Angular 存储到 django..它给我错误，如 500 内部server Eroor 并且为了允许非 dict 对象被序列化，将 safe 参数设置为 False。我在列表数组中发送消息数据..那么有什么问题吗？

模型.py

class msg(models.Model):
    name = models.ForeignKey(User, on_delete=models.CASCADE)
    receiver = models.CharField(max_length=20)
    text = models.CharField(max_length=1200)
    myDate = models.DateTimeField()

序列化器.py

class MesSerializer(serializers.ModelSerializer):
    name = serializers.SlugRelatedField(many=False, slug_field='name', queryset=User.objects.all())
    receiver = serializers.SlugRelatedField(many=False, slug_field='name', queryset=User.objects.all())
    class Meta:
        model = msg
        fields = '__all__'

视图.py

class msg_list(APIView):
    def get(self, request, format=None):
        mes = msg.objects.all()
        serializer = MesSerializer(mes, many=True)  # convert into JSON
        return Response(serializer.data)

    def post(self, request, formate = None):
        data …

我使用 websocket 前端（angular）后端（Django）创建实时聊天应用程序。我想将消息存储到 db（mySql）中。当我尝试将消息从 angular 存储到 django 时......它给了我错误：

non_field_errors:
["Expected a list of items but got type "dict"."]

那么有什么问题呢？

模型.py

class msg(models.Model):
    name = models.ForeignKey(User, on_delete=models.CASCADE)
    receiver = models.CharField(max_length=20)
    text = models.CharField(max_length=1200)
    myDate = models.DateTimeField()

序列化程序.py

class MesSerializer(serializers.ModelSerializer):
    name = serializers.SlugRelatedField(many=False, slug_field='name', queryset=User.objects.all())
    class Meta:
        model = msg
        fields = '__all__'

查看.py

class msg_list(APIView):
    def get(self, request, format=None):
        mes = msg.objects.all()
        serializer = MesSerializer(mes, many=True)  # convert into JSON
        return Response(serializer.data)

    def post(self, request, formate = None):
        serializer = MesSerializer(data=request.data, …

我想在图像上设置水印文本...所以我尝试使用 PIL 库

def watermark_text(input_image,
                   output_image,
                   text, pos):
    photo = Image.open(input_image)
    drawing = ImageDraw.Draw(photo)

    color = (255, 180, 80)
    font = ImageFont.truetype("arial.ttf", 40)
    drawing.text(pos, text, fill=color, font=font)
    photo.show()
    photo.save(output_image)

if __name__ == '__main__':
    img = 'cat.jpg'
    watermark_text(img, 'cats.jpg',
                   text='Sample Location Text',
                   pos=(180, 200))

但我想要这种类型的十字和透明颜色的文本：