Django的View视图类self.request和request

Z时代
2024-01-10
分类：技术分享

View中setup()函数:

def setup(self, request, *args, **kwargs):
    """Initialize attributes shared by all view methods."""
    self.request = request
    self.args = args    self.kwargs = kwargs

view视图:

from django.views.generic import View
class IndexView(View):
    def get(self, request, *args, **kwargs):        return render(self.request, 'index.html')

如果get()函数没有接收request就会报出如下错误:

TypeError: get() takes 1 positional argument but 2 were given~

既然View.setup函数已经将request对象赋值给self.request,get()函数所接收的request和self.request相同,
为什么我还需要在IndexView.get函数中重新接收一遍呢?

回答：

为了能够回答你的问题，特地去GitHub看了源码： https://github.com/django/django/blob/stable/1.3.x/django/views/generic/base.py

时间序列：

1.3版本引入了 base.py 即 class View.

@classonlymethod
def as_view(cls, **initkwargs):
    # ...
    def view(request, *args, **kwargs):
        self = cls(**initkwargs)
        return self.dispatch(request, *args, **kwargs)
    # take name and docstring from class    update_wrapper(view, cls, updated=())