http://127.0.0.1:8000/crm/add_edit_customer/22/?next=%2Fcrm%2Fcustomers%2F%3Fsearch_field%3Dqq__contains%26kw%3D111

想要获取/22/，需要后端声明(id)为获取的参数，def add_edit_customer(request,id)

想要获取%2Fcrm%2Fcustomers%2F%3Fsearch_field%3Dqq__contains%26kw%3D111(%2F等：为urlencode编码，是为了防止request获取时，以&分隔，无法获得整个字符串)，直接request.GET.get('next')就可以

*例如：

Q= QueryDict(mutable=True)

get_data = request.GET.copy()

next = /crm/customers/?search_field=qq__contains&kw=111

request.GET,获取到的是 ：<QueryDict: {'search_field': ['qq__contains'], 'kw': ['111']}>

request.path 获取到的是：/customers/

urlencode()后变成：

next = %2Fcrm%2Fcustomers%2F%3Fsearch_field%3Dqq__contains%26kw%3D111