返回在视图或响应上未设置`template_name`属性的模板响应drf-yasg2

问题描述

我按照drf-yasg2的文档设置了所有内容，但出现此错误，找不到导致它的原因。我浏览了文档，那里没有任何我可以使用的东西。似乎每个响应都退回到 TemplateHTMLRenderer ，而不是使用drf-yasg2 ReDoc或SwaggerUI渲染器。

    def render(self,swagger,accepted_media_type=None,renderer_context=None):
        if not isinstance(swagger,Swagger):  # pragma: no cover
            return TemplateHTMLRenderer().render(
                swagger,accepted_media_type,renderer_context
            )

        self.set_context(renderer_context,swagger)
        return render_to_string(
            self.template,renderer_context,renderer_context["request"]
        )

此条件永远不会返回 false

if not isinstance(swagger,Swagger):

因为 djangorestgramework （response.py）中的Response类正在使用 self.data 而不是作为参数呈现的方法来调用此方法：

ret = renderer.render(self.data,context)

我不知道我在做什么错了。

在我的项目中，我使用：

drf-yasg2 == 1.18.5
djangorestframework == 3.8.0
Django == 2.0.1

urls.py

from rest_framework import permissions
from drf_yasg2.views import get_schema_view
from drf_yasg2 import openapi

schema_view = get_schema_view(
   openapi.Info(
      title="Snippets API",default_version='v1',description="Test description",),public=True,permission_classes=(permissions.AllowAny,)

urlpatterns = [
    
    url(r'^swagger(?P<format>\.json|\.yaml)$',schema_view.without_ui(cache_timeout=0),name='schema-json'),url(r'^swagger/$',schema_view.with_ui('swagger',cache_timeout=0),name='schema-swagger-ui'),path('redoc/',schema_view.with_ui('redoc',name='schema-redoc'),

settings.py-> INSTALLED_APPS

INSTALLED_APPS = [
    'rest_framework','myappname','rest_framework.authtoken','django.contrib.admin','django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.messages','django.contrib.staticfiles','fcm_django','storages','colorfield','drf_yasg2',]

错误

Internal Server Error: /swagger/
Traceback (most recent call last):
  File "C:\Users\User\AppData\Local\Programs\Python\python37\lib\site-packages\django\core\handlers\exception.py",line 35,in inner
    response = get_response(request)
  File "C:\Users\User\AppData\Local\Programs\Python\python37\lib\site-packages\django\core\handlers\base.py",line 158,in _get_response
    response = self.process_exception_by_middleware(e,request)
  File "C:\Users\User\AppData\Local\Programs\Python\python37\lib\site-packages\django\core\handlers\base.py",line 156,in _get_response
    response = response.render()
  File "C:\Users\User\AppData\Local\Programs\Python\python37\lib\site-packages\django\template\response.py",line 106,in render
    self.content = self.rendered_content
  File "C:\Users\User\AppData\Local\Programs\Python\python37\lib\site-packages\rest_framework\response.py",line 72,in rendered_content
    ret = renderer.render(self.data,context)
  File "C:\Users\User\AppData\Local\Programs\Python\python37\lib\site-packages\drf_yasg2\renderers.py",line 79,in render
    swagger,renderer_context
  File "C:\Users\User\AppData\Local\Programs\Python\python37\lib\site-packages\rest_framework\renderers.py",line 168,in render
    template_names = self.get_template_names(response,view)
  File "C:\Users\User\AppData\Local\Programs\Python\python37\lib\site-packages\rest_framework\renderers.py",line 197,in get_template_names
    'Returned a template response with no `template_name` attribute set on either the view or response'
django.core.exceptions.ImproperlyConfigured: Returned a template response with no `template_name` attribute set on either the view or response
[16/Oct/2020 00:39:23] "GET /swagger/ HTTP/1.1" 500 112354

解决方法

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django django django-rest-framework drf-yasg python