如果要在所有页面中显示该表单，则需要添加表单（***将其命名为 login_form ，这样就不会与每个View的上下文冲突）。

If you want to display the form in all pages, you need to add the form (better call it login_form so it doesn't conflict with other forms you may have) to every View's context.

为避免在重复执行此操作在所有视图中，Django都有上下文处理器。将它们包含在 settings.py 的 TEMPLATES 变量中。示例

To avoid doing that repeatedly in all Views, Django has Context Processors. You include them in settings.py's TEMPLATES variable. Example

TEMPLATES = [{
    ...
    'OPTIONS': {
        'context_processors': [
            ...
            'myapp.context_processors.add_my_login_form',
        ],
    }]

然后，创建一个名为 context_processors.py 的文件，并添加 add_my_login_form（）函数。该函数将 login_form 返回到所有请求的请求上下文。

Then, create a file called context_processors.py and add the add_my_login_form() function in there. The function returns the login_form to the request context of all requests.

def add_my_login_form(request):
    return {
        'login_form': LoginForm(),
    }

由于要在每个页面中呈现表单，因此***使用模板缓存。

Since you are rendering the form in every page, it maybe good to use template caching.