Django context must be a dict ranther than Context

1.1

错误描述

TypeError at /time/

context must be a dict rather than Context.

Request Method:	GET

Request URL:	http://127.0.0.1:8000/time/

Django Version:	2.0.5

Exception Type:	TypeError

Exception Value:

context must be a dict rather than Context.

Exception Location:	E:\Python\djone\venv\lib\site-packages\django\template\context.py in make_context, line 274

Python Executable:	E:\Python\djone\venv\Scripts\python.exe

Python Version:	3.6.5

Python Path:

['E:\\Python\\djone\\mysite',

 'E:\\Python\\djone\\venv\\Scripts\\python36.zip',

 'C:\\Users\\daixiyu\\AppData\\Local\\Programs\\Python\\Python36\\DLLs',

 'C:\\Users\\daixiyu\\AppData\\Local\\Programs\\Python\\Python36\\lib',

 'C:\\Users\\daixiyu\\AppData\\Local\\Programs\\Python\\Python36',

 'E:\\Python\\djone\\venv',

 'E:\\Python\\djone\\venv\\lib\\site-packages',

 'E:\\Python\\djone\\venv\\lib\\site-packages\\setuptools-28.8.0-py3.6.egg',

 'E:\\Python\\djone\\venv\\lib\\site-packages\\pip-9.0.1-py3.6.egg']

Server time:	Fri, 25 May 2018 23:27:35 +0000

代码

def current_datetime(request):

	now = datetime.datetime.now()

	t = get_template('current_datetime.html')

	html = t.render(Context({'current_date': now}))

return HttpResponse(html)

分析

问题出在 t.render() 上在Django2.0.5中

get_template()返回的Template对象的render方法上，让我们看一下render方法的源码

def render(self, context=None, request=None):

    context=make_context(context,request,autoescape=self.backend.engine.autoescape)

    try:

        return self.template.render(context)

    except TemplateDoesNotExist as exc:

        reraise(exc, self.backend)

看第二行，调用了make_context(), 再看 make_context() 的源码

def make_context(context, request=None, **kwargs):

    """

    Create a suitable Context from a plain dict and optionally an HttpRequest.

    """

    if context is not None and not isinstance(context, dict):

        raise TypeError('context must be a dict rather than %s.' % context.__class__.__name__)

    if request is None:

        context = Context(context, **kwargs)

    else:

        # The following pattern is required to ensure values from

        # context override those from template context processors.

        original_context = context

        context = RequestContext(request, **kwargs)

        if original_context:

            context.push(original_context)

    return context