Django将imagefield序列化以获取完整的URL [英] Django serialize imagefield to get full url

问题描述

我是Django的初学者，目前我可以构建这样的模型。

Models.py

  class Car（models.Model）：
 name = models.CharField（max_length = 255）
 price = models.DecimalField（max_digits = 5，decimal_places = 2）
 photo = models.ImageField（upload_to ='cars'）
  

Serializers.py

  CarSerializer（serializers.ModelSerializer）：
 class Meta：
 model = Car 
 fields =（'id'，'name'，'price'，'photo'）
  

Views.py

  CarView（APIView）：
 permission_classes =（）
 def get（self，request）：
 car = Car.objects.all（）
 serializer = CarSerializer（car）
返回n响应（serializer.data）
  

对于照片，它不显示完整的URL。如何显示完整的网址？

解决方案

Django没有为存储在 models.ImageField （至少如果您不在 MEDIA_URL ;包括域名不推荐！）。

但是，您可以通过使用自定义的 serializers.SerializerMethodField 。在这种情况下，您的序列化器需要更改如下：

  class CarSerializer（serializers.ModelSerializer）：
 photo_url = serializers.SerializerMethodField（）
 
 class Meta：
 model = Car 
 fields =（'id'，'name'，'price'，'photo_url'）
 
 def get_photo_url（self，car）：
 request = self.context.get（'request'）
 photo_url = car.photo.url 
 return request.build_absolute_uri（photo_url ）
  

还要确保你已经设置了Django的 MEDIA_ROOT 和 MEDIA_URL 参数，您可以通过浏览器访问照片 http：// localhost：8000 / path / to / your / image.jpg 。 / p>

正如打桩所指出的，您需要在您的views.py中初始化序列化程序时添加请求：

  def my_view（request）：
 ... 
 car_serializer = CarSerializer（car，context = {request：request}）
 car_serializer.data 
  

I am beginner to Django and currently, I can construct model like this.

Models.py

class Car(models.Model):
    name = models.CharField(max_length=255)
    price = models.DecimalField(max_digits=5, decimal_places=2)
    photo = models.ImageField(upload_to='cars')

Serializers.py

class CarSerializer(serializers.ModelSerializer):
    class Meta:
        model = Car
        fields = ('id','name','price', 'photo') 

Views.py

class CarView(APIView):
    permission_classes = ()
    def get(self, request):
    car = Car.objects.all()
    serializer = CarSerializer(car)
    return Response(serializer.data)

For photo, it doesn't show full url. How can I show full url?

解决方案

Django is not providing an absolute URL to the image stored in a models.ImageField (at least if you don't include the domain name in the MEDIA_URL; including the domain is not recommended!).

However, you can modify your serializer to return the absolute URL of your photo by using a custom serializers.SerializerMethodField. In this case, your serializer needs to be changed as follows:

class CarSerializer(serializers.ModelSerializer):
    photo_url = serializers.SerializerMethodField()

    class Meta:
        model = Car
        fields = ('id','name','price', 'photo_url') 

    def get_photo_url(self, car):
        request = self.context.get('request')
        photo_url = car.photo.url
        return request.build_absolute_uri(photo_url)

Also make sure that you have set Django's MEDIA_ROOTand MEDIA_URL parameters and that you can access a photo via your browser http://localhost:8000/path/to/your/image.jpg.

As piling pointed out, you need to add the request while initialising the serializer in your views.py:

def my_view(request):
    …
    car_serializer = CarSerializer(car, context={"request": request})
    car_serializer.data

这篇关于Django将imagefield序列化以获取完整的URL的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！