如何在 Django Rest 视图中获取媒体的完整 URL

Question

我正在这个视图中处理图像/媒体/文件，并且我为文章模型编写了这个视图来完成一些工作：

@api_view(["GET"])
def article_grid_list(request):
    # fetched data from the database
    data = Articles.objects.all().order_by("-created_date")[:11]
    pinned_article = Articles.objects.get(pinned=True)

    # serialized data
    pinned_data = ArticlesSerializer(pinned_article)
    horizontal_data = ArticlesSerializer(data[:3], many=True)
    small_data = ArticlesSerializer(data[3:8], many=True)
    card_data = ArticlesSerializer(data[8:], many=True)

    final_data = {
        "pinned":pinned_data.data,
        "horizontal": horizontal_data.data,
        "small": small_data.data,
        "card": card_data.data
    }

当我打印此请求的结果时，我得到cover如下字段："cover": "/media/article/artice_cover_NkOUuZ7vH3zEejCgV.jpg",

但我想要带有主机名的图像 URL

当我编写像 ModelViewSet 这样的函数时，我会获取该字段的绝对 URL cover，并且我想在每个请求中获取图像的绝对 URL（主机名 + 图像路径）

模型视图集示例：

class ArticleGridList(viewsets.ModelViewSet):
    queryset = Articles.objects.all().order_by("-created_date")
    serializer_class = ArticlesSerializer

我期望这样： "cover": "http://localhost:8000/media/article/artice_cover_NkOUuZ7vH3zEejCgV.jpg"

我的应用程序 urls.py 文件：

router = routers.SimpleRouter()
router.register('articles', ArticlesViewSet)
urlpatterns = [
  path("article-grid-list/", article_grid_list)
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

urlpatterns += router.urls

Answer 1

您需要context = {'request':request}像这样发送序列化器......

方式 - 1

# serialized data
pinned_data = ArticlesSerializer(pinned_article,context = {'request':request})
horizontal_data = ArticlesSerializer(data[:3], many=True,context = {'request':request})
small_data = ArticlesSerializer(data[3:8], many=True,context = {'request':request})
card_data = ArticlesSerializer(data[8:], many=True,context = {'request':request})

way - 2（要应用此方法，您需要像上面的方法一样在序列化器中添加 context = {'request':request}`。

class ArticleSerializer(serializers.ModelSerializer):
    cover = serializers.SerializerMethodField()
    def get_cover(self,obj):
        request = self.context.get('request')
        return str(request.build_absolute_uri(obj.cover.url))