Python Django 错误：render_to_response() 得到了一个意外的关键字参数“context_instance”
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Django error: render_to_response() got an unexpected keyword argument 'context_instance'
提问by Alasdair
After upgrading to Django 1.10, I get the error render_to_response() got an unexpected keyword argument 'context_instance'.
升级到 Django 1.10 后，出现错误render_to_response() got an unexpected keyword argument 'context_instance'。
My view is as follows:
我的看法如下：
from django.shortcuts import render_to_response
from django.template import RequestContext
def my_view(request):
context = {'foo': 'bar'}
return render_to_response('my_template.html', context, context_instance=RequestContext(request))
Here is the full traceback:
这是完整的回溯：
Traceback:
File "/Users/alasdair/.virtualenvs/django110/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
39. response = get_response(request)
File "/Users/alasdair/.virtualenvs/django110/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/Users/alasdair/.virtualenvs/django110/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/alasdair/dev/rtr/rtr/urls.py" in my_view
26. return render_to_response('my_template.html', context, context_instance=RequestContext(request))
Exception Type: TypeError at /
Exception Value: render_to_response() got an unexpected keyword argument 'context_instance'
回答by Alasdair
The context_instanceparameter in render_to_responsewas deprecated in Django 1.8, and removed in Django 1.10.
该context_instance参数render_to_response是不推荐在Django 1.8，并且在Django 1.10删除。
The solution is to switch to the rendershortcut, which automatically uses a RequestContext.
解决方案是切换到render快捷方式，它会自动使用RequestContext.
Update your imports and view as follows. Note that rendertakes the requestobject as its first argument.
更新您的导入和视图，如下所示。请注意，render将request对象作为其第一个参数。
from django.shortcuts import render
def my_view(request):
context = {'foo': 'bar'}
return render(request, 'my_template.html', context)
The rendershortcut was introduced in Django 1.3, so this change is compatible with older versions of Django.
该render快捷方式是在 Django 1.3 中引入的，因此此更改与旧版本的 Django 兼容。
回答by Dantez Layton
in Django 1.8 is compatible:
在 Django 1.8 中是兼容的：
from django.shortcuts import render_to_response
from django.template import RequestContext
def my_view(request):
context = {'foo': 'bar'}
return render_to_response('my_template.html', {'context':context}, context_instance=RequestContext(request))
in Django 1.11
在 Django 1.11
from django.shortcuts import render
from django.template import RequestContext
def my_view(request):
context = {'foo': 'bar'}
return render(request, 'my_template.html', context)
回答by VIctor Angelov
Django 2.0.7 python 3.5
Django 2.0.7 蟒蛇 3.5
in project/urls.py
在项目/urls.py
handler404 = 'project.views.not_found'
handler500 = 'project.views.server_error'
in project/views.py
在项目/views.py
def not_found(request, exception=None):
response = render(request, '404.html', {})
response.status_code = 404
return response
def server_error(request, exception=None):
response = render(request, '500.html', {})
response.status_code = 500
return response
exception=None is passed because otherwise it throws TypeError: server_error() missing 1 required positional argument: 'exception'
exception=None 被传递，否则它会抛出TypeError: server_error() missing 1 required positional argument: 'exception'
