上下文渲染器RequestContext

Posted 2020-10-06 songbird

在render_to_response中加RequestContext会将settings中设置的context_processors返回值收集起来传到模板

return render_to_response(‘index.html‘, {...}, context_instance=RequestContext(request))

settings.py

TEMPLATES = [
    {
        ‘BACKEND‘: ‘django.template.backends.django.DjangoTemplates‘,
        ‘DIRS‘: [os.path.join(BASE_DIR, ‘templates‘)]
        ,
        ‘APP_DIRS‘: True,
        ‘OPTIONS‘: {
            ‘context_processors‘: [
                ‘django.template.context_processors.debug‘,
                ‘django.template.context_processors.request‘,
                ‘django.contrib.auth.context_processors.auth‘,
                ‘django.contrib.messages.context_processors.messages‘,
                ‘BookStore.views.global_settings‘,
                ‘django.template.context_processors.media‘,
                ‘BookStore.context_processor.ip_address‘,

            ],
        },
    },

可以手动写个上下文渲染器（以下摘自自强学堂）：新建context_processor.py

添加以下内容

 
def ip_address(request):
    return {‘ip_address‘: request.META[‘REMOTE_ADDR‘]}

settings.py中加入对应路径，如上面的settings.py加入了‘BookStore.context_processor.ip_address‘

 在模板中就可以使用

{{ ip_address }}

 

https://lincolnloop.com/blog/2008/may/10/getting-requestcontext-your-templates/

这里有如何向render_to_response添加RequestContext的方法。

有个@render_to感觉非常经典，代码如下

def render_to(template_name):
    def renderer(func):
        def wrapper(request, *args, **kw):
            output = func(request, *args, **kw)
            if not isinstance(output, dict):
                return output
            return render_to_response(request, template_name, output)
        return wrapper
    return renderer

@render_to(‘my_template.html‘)
def my_view(request):
    # View code here...
    return some_dict