filter.py 文件源码

def render(self, context):
        mods = [(smart_str(k, 'ascii'), op, v.resolve(context))
                for k, op, v in self.mods]
        if self.qdict:
            qdict = self.qdict.resolve(context)
        else:
            qdict = None
        # Internally work only with QueryDict
        qdict = self._get_initial_query_dict(qdict)
        # assert isinstance(qdict, QueryDict)
        for k, op, v in mods:
            qdict.setlist(k, self._process_list(qdict.getlist(k), op, v))
        qstring = qdict.urlencode()
        if qstring:
            qstring = '?' + qstring
        if self.asvar:
            context[self.asvar] = qstring
            return ''
        else:
            return qstring