使用DRF进行响应的更好方法?

时间:2018-10-23 10:16:00

标签: python django django-rest-framework

我有这个动作:

@action(methods=['get'], detail=True)
    def download_csv(self, request, pk, *args, **kwargs):
        project = self.get_object()
        data = show_stages_tasks(request, pk)
        file_name = f"{project.name}.csv"
        export_to_csv(data, file_name)

        file_handle = open(file_name, "r")
        response = FileResponse(file_handle.read(), content_type='application/csv')
        response['Content-Disposition'] = f'attachment; filename="{file_handle.name}"'
        file_handle.close()
        os.remove(file_name)
        return response

export_to_csv是:

def export_to_csv(data, filename="project"):    
    content = JSONRenderer().render(data)
    stream = io.BytesIO(content)
    content_parsed = JSONParser().parse(stream)

    tasks = content_parsed[0]["related_tasks"]

    keys = tasks[0].keys()
    with open(filename, 'w') as output_file:
        dict_writer = csv.DictWriter(output_file, fieldnames=keys)
        dict_writer.writeheader()
        for task in tasks:
            task['children'] = []
            task['task_folders'] = []
            dict_writer.writerow(task)

然后show_stages_tasks使用DRF序列化程序返回一个序列化的数据,其中包含3个嵌套的序列化程序(太大,我认为没有必要在此处发布)。
如您在此处看到的-我解析序列化器数据,创建一个CSV文件,保存它,然后打开它,传递响应并删除文件。问题是我可以以某种方式传递文件的内容,而无需实际创建CSV文件并随后将其删除吗?

1 个答案:

答案 0 :(得分:1)

Django's official doc中,您可以找到类似的示例。

在该示例中,他们使用的是 django.http.HttpResponse 类,也可以在您的情况下使用

import csv 
from django.http import HttpResponse

def some_view(request):
    # Create the HttpResponse object with the appropriate CSV header.
    response = HttpResponse(content_type='text/csv')
    response['Content-Disposition'] = 'attachment; filename="somefilename.csv"'

    writer = csv.writer(response)
    writer.writerow(['First row', 'Foo', 'Bar', 'Baz'])
    writer.writerow(['Second row', 'A', 'B', 'C', '"Testing"', "Here's a quote"])

    return response