Question

更具体地说，我需要访问表单对象的 init 方法中的请求对象。这是我的代码：

class TagNamesField(forms.CharField):
    def __init__(self, user=None, *args, **kwargs):

        super (TagNamesField,self).__init__(*args,**kwargs)

        self.required = True
        self.widget = forms.TextInput(attrs={'size' : 50, 'autocomplete' : 'off'})
        self.max_length = 255
        self.label  = _('tags')
        #self.help_text = _('please use space to separate tags (this enables autocomplete feature)')
        self.help_text = _('Tags are short keywords, with no spaces within. At least %(min)s and up to %(max)s tags can be used.') % {
            'min': settings.FORM_MIN_NUMBER_OF_TAGS, 'max': settings.FORM_MAX_NUMBER_OF_TAGS
        }
        self.initial = self.request.session['previous_url']
        self.user = user

基本上，我想初始化此表单：self.initial = self.request.session['previous_url']

有什么想法吗？谢谢！

Answer 1

表单和小部件与请求信息按设计分离。做你想做的事的简单方法是以这种方式在视图中实例化一个表单：

form = SomeForm(initial={'tags': self.request.session['whatever']})

但是，创建自定义表单接受request作为额外参数（给表单类访问）可能更合适：

form = SomeForm(request=request)

如何访问django forms.py中的请求对象？

1 个答案: