延伸forms.SelectMultiple不会失去价值

Question

我有一个模型表单，我正在为它编写一个自定义小部件，以便替换多对多forms.SelectMultiple具有jQuery FCBKcomplete小部件的字段。虽然multiselect元素的替换工作正常，但它不再拖动multiselect的选项。在

这是我的小工具：

class FCBKcompleteWidget(forms.SelectMultiple):
    def _media(self):
        return forms.Media(js=(reverse('appstatic',
                                       args=['js/jquery.fcbkcomplete.min.js']),
                               reverse('appstatic',
                                       args=['js/init-fcbkcomplete.js'])),
                           css={'all': (reverse('appstatic',
                                                args=['css/jquery.fcbkcomplete'
                                                      '.css']),)})

    media = property(_media)

这是我的表格：

^{pr2}$

以下是我的模型：

class Category(models.Model):
    """A blog category"""

    title = models.CharField(max_length=128)
    slug = models.SlugField()

    class Meta(object):
        verbose_name_plural = u'Categories'

    def __unicode__(self):
        return self.title

    @models.permalink
    def get_absolute_url(self):
        return ('category', (), {'slug': self.slug})


class Blog(models.Model):
    """A blog"""

    title = models.CharField(max_length=128)
    slug = models.SlugField(unique=True)
    description = models.TextField()
    categories = models.ManyToManyField(Category, related_name='blogs')
    shared = models.BooleanField()
    admins = models.ManyToManyField(User, related_name='blog_admins')
    editors = models.ManyToManyField(User, related_name='blog_editors')

    def __unicode__(self):
        return self.title

    @models.permalink
    def get_absolute_url(self):
        return ('blog', (), {'slug': self.slug})

以下是生成的HTML：

<div class="field">
  <label for="name">Categories</label>
  <select multiple="multiple" name="categories" id="id_categories">
  </select>
  <div class="help-text">trimmed for readability</div>
</div>
<div class="field">
  <label for="name">Admins</label>
  <select multiple="multiple" name="admins" id="id_admins">
  </select>
  <div class="help-text">trimmed for readability</div>
</div>
<div class="field">
  <label for="name">Editors</label>
  <select multiple="multiple" name="editors" id="id_editors">
  </select>
  <div class="help-text">trimmed for readability</div>
</div>

如您所见，没有一个选项将其放入multiselect元素中。当生成的小部件是我的自定义小部件时，请不要在此处用HTML替换：

<div class="field">
  <label for="name">Categories</label>
  <select multiple="multiple" name="categories" id="id_categories">
    <option value="1" selected="selected">Good Stuff</option>
  </select>
  <div class="help-text">trimmed</div>
</div>
<div class="field">
  <label for="name">Admins</label>
  <select multiple="multiple" name="admins" id="id_admins">
    <option value="2" selected="selected">username</option>
    <option value="3">some username</option>
    <option value="4">another username</option>
  </select>
  <div class="help-text">trimmed</div>
</div>
<div class="field">
  <label for="name">Editors</label>
  <select multiple="multiple" name="editors" id="id_editors">
    <option value="2" selected="selected">username</option>
    <option value="3">some username</option>
    <option value="4">another username</option>
  </select>
  <div class="help-text">trimmed</div>
</div>

有人对为什么这些选项没有通过widget替换过程有什么建议吗？任何帮助都将不胜感激。在

Answer 1

一年过去了，但即使使用当前的django版本，答案也可能很有价值。在

这种行为的原因似乎是缺少fcbk字段的CHOICES属性 把选择推到表单上

class EmailSubscriptionFilterForm(forms.ModelForm):

    class Meta:
        model = EmailSubscription
        exclude = ('dsts',)

    def loc_name(self, id):
        return Location.objects.get(id = id).name           

    def __init__(self, *args, **kwargs):
        super(EmailSubscriptionFilterForm, self).__init__(*args, **kwargs)
        fcbkcomplete_fields = ['orgs']
        for field in fcbkcomplete_fields:
            self.fields[field].widget = MultiOriginSelect()
        if args:
            self.fields['orgs'].choices = ([(int(o), self.loc_name(int(o))) for o in args[0].getlist('orgs')] )

对于init，它将把POST请求附带的所有选项添加到select主体。在