spectator_core.py 文件源码

def query_string(context, key, value):
    """
    For adding/replacing a key=value pair to the GET string for a URL.

    eg, if we're viewing ?p=3 and we do {% url_replace order 'taken' %}
    then this returns "p=3&order=taken"

    And, if we're viewing ?p=3&order=uploaded and we do the same thing, we get
    the same result (ie, the existing "order=uploaded" is replaced).

    Expects the request object in context to do the above; otherwise it will
    just return a query string with the supplied key=value pair.
    """
    try:
        request = context['request']
        args = request.GET.copy()
    except KeyError:
        args = QueryDict('').copy()
    args[key] = value
    return args.urlencode()