Django里面的RequestContext
2013-09-13 20:23
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c = RequestContext(request, { 'foo': 'bar', }) get_template('about.html').render(c)
当我们定义一个RequestContext对象的时候,它的构造函数 __init__
会调用 get_standard_processors(), 返回一个collect
collect.extend(_builtin_context_processors) collect.extend(settings.TEMPLATE_CONTEXT_PROCESSORS)
这个就和TEMPLATE_CONTEXT_PROCESSORS 联系在一起, 得到settings里面的设置.
这个过程只执行一次,当下次再执行的时候,由于
global _standard_context_processors 变量非none.
另外观察RequestContext的__init__
def __init__(self, request, dict_=None, processors=None, current_app=None,
use_l10n=None, use_tz=None):
有一个processors参数,我们可以在构造对象的时候,给它n个临时的processor
=================Example================================
Info.xml
<!DOCTYPE html> <html> <head> About firstDJ </head> <body> Thanks for watching me, my address is <b>{{myaddress}}</b>, my request is <b>{{myrequest}}</b>... </body> </html>
py
def custome_proc(request): return {'myaddress': request.META['REMOTE_ADDR']} def hello(request, *args, **kwargs): c = RequestContext(request, { 'myrequest': 'milk', }, processors = [custome_proc]) t = get_template('info.html') return HttpResponse(t.render(c))
结果
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