python – 自定义小部件仅在第一次不验证

class OrderedCheckboxSelectMultiple(forms.CheckboxSelectMultiple):

    def render(self,name,value,attrs=None,choices=()):
        if value is None: value = []
        has_id = attrs and 'id' in attrs
        final_attrs = self.build_attrs(attrs,name=name)
        output = [u'<ol class="numeric">']
        # Normalize to strings
        str_values = set([force_unicode(v) for v in value])
        for i,(option_value,option_label) in enumerate(chain(self.choices,choices)):
            # If an ID attribute was given,add a numeric index as a suffix,# so that the checkboxes don't all have the same ID attribute.
            if has_id:
                final_attrs = dict(final_attrs,id='%s_%s' % (attrs['id'],i))
                label_for = u' for="%s"' % final_attrs['id']
            else:
                label_for = ''

            cb = forms.CheckboxInput(final_attrs,check_test=lambda value: value in str_values)
            option_value = force_unicode(option_value)
            rendered_cb = cb.render(name,option_value)
            option_label = conditional_escape(force_unicode(option_label))
            output.append(u'<li class="liAll"><label%s class="checkbox inline">%s <span class="spanLabel">%s</span></label></li>' % (
                label_for,rendered_cb,option_label))
        output.append(u'</ol>')
        return mark_safe(u'n'.join(output))

我在两个不同的字段中使用此窗口小部件：

class SomeForm(forms.Form):
    # more fields here

    alert1 = forms.MultipleChoiceField(choices=[(a.id,a.description) for a in SomeModel.objects.filter(a=True)],widget=OrderedCheckboxSelectMultiple())
    alert2 = forms.MultipleChoiceField(choices=[(a.id,a.description) for a in SomeModel.objects.filter(b=True)],widget=OrderedCheckboxSelectMultiple())

问题是,当我第一次提交表单时,我收到验证错误：

Select a valid choice. is not one of the available choices.

然后,当我再次勾选选项时,它会毫无问题地验证.我迷失在这里.有什么建议？

注意：

如果我使用forms.CheckboxSelectMultiple作为alert1和alert2的小部件,也会发生同样的事情.

编辑：

在调试时,我可以看到alert1和alert2在我第一次提交时没有出现在request.POST上.

对不起,我搞错了. alert1和alert2出现在request.POST上,但是尽管被勾选,它们都是你的.

编辑2：

使用Chrome的“Inspect元素”,我可以看到第一次正确渲染表单：

<ol class="numeric">
    <li class="liAll">
        <label for="id_alert1_0" class="checkbox inline">
            <div class="checker" id="uniform-id_alert1_0">
                <span>
                    <input value="1" type="checkbox" class="check" name="alert1" id="id_alert1_0" style="opacity: 0;">
                </span>
            </div>
        </label>
    </li>
    <li class="liAll">
        <label for="id_alert1_1" class="checkbox inline">
            <div class="checker" id="uniform-id_alert1_1">
                <span>
                    <input id="id_alert1_1" type="checkbox" class="check" value="2" name="alert1" style="opacity: 0;">
                </span>
            </div>
        </label>
    </li>
</ol>

然后再次显示验证消息,但渲染的表单看起来相同：

<ol class="numeric">
    <li class="liAll">
        <label for="id_alert1_0" class="checkbox inline">
            <div class="checker" id="uniform-id_alert1_0">
                <span>
                    <input value="1" type="checkbox" class="check" name="alert1" id="id_alert1_0" style="opacity: 0;">
                </span>
            </div>
        </label>
    </li>
    <li class="liAll">
        <label for="id_alert1_1" class="checkbox inline">
            <div class="checker" id="uniform-id_alert1_1">
                <span>
                    <input id="id_alert1_1" type="checkbox" class="check" value="2" name="alert1" style="opacity: 0;">
                </span>
            </div>
        </label>
    </li>
</ol>

我正在使用提交按钮提交帖子：

<button type="submit" class="btn btn-primary">Send</button>