django传递公共参数到模板

因为显示需要，例如用户等信息是需要在每次请求传递回页面!

django传递公共的参数到界面有两种方法

1.中间件

修改settings.py配置信息 MIDDLEWARE_CLASSES 增加自定义的中间件

中间件的缺点是render_to_response无法触发process_template_response

必须返回带有render()方法的HttpResponse()的实例

class PublicParameter(object):
    def process_template_response(self, request, response):
        """
            传递公共数据
        """
        user = User.objects.get()
        if isinstance(response.context_data, dict):
            response.context_data['user'] = projectList
        else:
            response.context_data = {'user':projectList}
        return response

2.通过RequestContext对象

配置settings.py中 TEMPLATE_CONTEXT_PROCESSORS

TEMPLATE_CONTEXT_PROCESSORS = (
    "django.contrib.auth.context_processors.auth",
    "django.core.context_processors.debug",
    "django.core.context_processors.i18n",
    "django.core.context_processors.media",
    "django.core.context_processors.static",
    "django.contrib.messages.context_processors.messages",
    "myapp.public_parameter",
)

def public_parameter(request):
    user = User.objects.get()
    return {'user': user}

视图需要传递context_instance

def project(request):
    return render_to_response("test.html",context_instance=RequestContext(request),)