Django 在发布请求后下载 csv

Question

我想创建一个端点，在此端点中可以发送 POST 请求，如果 POST 请求\nis 已验证，则页面下载 csv

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我创建了序列化器表单来轻松验证收到的数据

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我的问题是 csv 很容易在 HttpResponse 中下载，但我需要在发布请求中创建端点和数据验证。

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我的主要问题是我不能\xc2\xb4t 返回export下一个函数validation

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这是我的文件

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#urls.py\n\nfrom django.conf.urls import url\nfrom . import views\n\nurlpatterns = [\n    url(r\'^hello-view/\', views.HelloApiView.as_view()),\n]\n

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序列化器

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#serializers.py\nfrom rest_framework import serializers\n\nclass HelloSerializer(serializers.Serializer):\n    """Serializes a name field """\n\n    name = serializers.CharField(max_length=100)\n    seller_id =  serializers.CharField(max_length=100)\n\n    def validate_name(self, dob):\n        UnitOfMeasureName = ["Each", "Grams", "Ounces", "Pounds", "Kilograms", "Metric Tons"]\n        if dob in UnitOfMeasureName:\n            return dob\n        else:\n            raise serializers.ValidationError(\'Wrong username\')\n

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和视图文件\n在此文件中，我创建了导出函数来尝试导出 csv 数据，但不起作用

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import csv\nfrom django.shortcuts import render\nfrom django.http import HttpResponse\nfrom rest_framework import viewsets\nfrom rest_framework.views import APIView\nfrom rest_framework.response import Response\nfrom rest_framework import status\n\nfrom . import serializers\n\n\nclass HelloApiView(APIView):\n\n    def export(self, request):\n        response = HttpResponse(content_type=\'text/csv\')\n        writer = csv.writer(response)\n        writer.writerow([\'First name\', \'Last name\', \'ID\'])\n\n        response[\'Content-Disposition\'] = \'attachment; filename="one.csv"\'\n        return response\n\n    serializer_class = serializers.HelloSerializer\n\n    def get(self, request, format=None):\n\n        an_apiview = [\n            \'Uses HTTP METHOD as function\',\n            \'Its is similar to a traditional django view\'\n        ]\n\n        return Response({\'message\': \'Hello\', \'anapi\': an_apiview})\n\n    def post(self, request):\n        serializer = serializers.HelloSerializer(data = request.data)\n\n        if serializer.is_valid():\n                in this place i want to return the file\n\n\n        else:\n            return Response(\n                serializer.errors, status = status.HTTP_400_BAD_REQUEST)\n

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Answer 1

将新端点添加到您的 urls.py 文件中

#urls.py

from django.conf.urls import url
from . import views

urlpatterns = [
    url(r'^hello-view/', views.HelloApiView.as_view()),
    url(r'^csv_download/$', views.csv_download, name="csv_download"),
]

然后在你的views.py文件中，添加一个名为的函数csv_download并将所有的东西移到那里（这可能是不必要的，但它确实可以使代码更干净，更易读）

# views.py

import csv
from django.shortcuts import render
from django.http import HttpResponse
from rest_framework import viewsets
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status

from . import serializers


class HelloApiView(APIView):
    def get(self, request, format=None):
        an_apiview = [
            'Uses HTTP METHOD as function',
            'Its is similar to a traditional django view'
        ]
        return Response({'message': 'Hello', 'anapi': an_apiview})


def csv_download(request):


    if request.method == 'POST':
        serializer_class = serializers.HelloSerializer
        serializer = serializers.HelloSerializer(data = request.data)
        if serializer.is_valid():
            response = HttpResponse(content_type='text/csv')
            response['Content-Disposition'] = 'attachment; filename="one.csv"'
            writer = csv.writer(response,delimiter=',') # I always like to specify the delimeter
            writer.writerow(['First name', 'Last name', 'ID'])



            #Then you may actually want to write some data to the CSV file, currently, you've only defined the headers (first row). An example would be like:
            for value in list_of_objects:
                writer.writerow([
                value.first_name,
                value.last_name,
                value.id
                ])

            return response


        else:
            return Response(
                serializer.errors, status = status.HTTP_400_BAD_REQUEST)

    else:
        # redirect them or do something here if they hit this URL without a POST request