请解释我提到的代码行

Question

这是我在书上看到的mixin

from django.core.cache import caches
from django.views.decorators.cache import cache_page
from django.views.decorators.vary import vary_on_cookie

class CachePageVaryOnCookieMixin:
    cache_name = 'default'

    @classmethod
    def get_timeout(cls):
        if hasattr(cls, 'timeout'):
            return cls.timeout
        cache = caches[cls.cache_name]
        return cache.default_timeout

    @classmethod
    def as_view(cls, *args, **kwargs):
        view = super().as_view(*args, **kwargs)
        view = vary_on_cookie(view)
        view = cache_page(timeout = cls.get_timeout(), cache = cls.cache_name)(view)
        return view

在as_view()中view = cache_page(timeout = cls.get_timeout(), cache = cls.cache_name)(view) (view) 最后有什么用。是类型转换吗？

Answer 1

cache_page 是一个函数，returns 是另一个接受视图作为参数的函数。这也可以像这样分成两部分：

callable_func = cache_page(timeout = cls.get_timeout(), cache = cls.cache_name)
return callable_func(view)

请解释我提到的代码行

Please explain the line of code I Mentioned

python

django

mixins

django-class-based-views