Question

我正在扩展ListFilter以在Django 1.4中为Django Admin创建自定义ListFilter，但是django会自动将我的查询字符串参数转换为e = 1。有什么办法我可以告诉Django管理员允许某些参数;而不是将它们转换为e = 1.

这是我的Custom ListFilter：

class DateRangeListFilter(ListFilter):
    """ Custom Date Range Filter using Jquery UI for date-picker """
    title = _('date range')
    template = 'admin/filter_date.html'

    parameters = ['class_after', 'class_before']
    parameter_friendly_names = {parameters[0]: 'Class After', parameters[1]: 'Class Before'}
    parameter_values = {}
    parameter_name = parameters[0]
    used_parameters = {parameters[0]: '', parameters[1]: ''}

    def __init__(self, request, params, model, model_admin):
        super(ListFilter, self).__init__()

        for parameter in self.parameters:
            value = request.GET.get(parameter, None)
            if value:
                self.parameter_values[parameter] = value

        self.lookup_choices = list(self.lookups())

    def has_output(self):
        return len(self.lookup_choices) > 0

    def lookups(self, *args):
        lookup_list = []
        for key in self.parameters:
            lookup_list.append((key, self.parameter_friendly_names[key]))
        return lookup_list

    def expected_parameters(self):
        return self.parameters

    def queryset(self, request, queryset):
        return queryset

    def choices(self, cl):
        for lookup, title in self.lookup_choices:
            param_name = title
            replace_text = 'gte_icdate' if title == self.parameters[0] else 'lte_icdate'
            value = self.parameter_values[lookup] if self.parameter_values.has_key(lookup) else ''
            yield {
                'param_name': param_name,
                'selected': True if lookup is not None else False,
                'query_string': cl.get_query_string({param_name: replace_text, }, []),
                'value': value,
                'display': title,
                'replace_text': replace_text,
                }

Answer 1

Django有时太神奇了。几乎肯定有一种正确的方法可以做到这一点，我正在做的可能不是它。但是我修改了我的 init 函数来从字典中删除我的特殊参数;因此django管理员忽略了它。

def __init__(self, request, params, model, model_admin):
    super(ListFilter, self).__init__()

    for param_key in self.parameters: 
        if param_key in params.keys():
            self.parameter_values[param_key] = params[param_key]
            del params[param_key]  # This is the anti-magic line
        else:
            self.parameter_values[param_key] = ''

    self.lookup_choices = list(self.lookups())

Answer 2

我确实看到过这种情况：似乎你需要在视图中留下一组“干净”的参数。我见过pop（）被用作更有效的选择：

def __init__(self, request, params, model, model_admin):
    super(ListFilter, self).__init__()

    for param_key in self.parameters:
        self.parameter_values[param_key] = params.pop(param_key,'')

    self.lookup_choices = list(self.lookups())

在django中创建自定义列表过滤器

2 个答案: