如何向我的 Django 模型添加一个字段以动态过滤另一个字段的下拉列表？答案

【问题标题】：How can i add a field to my Django model to dynamically filter a dropdown on another field?如何向我的 Django 模型添加一个字段以动态过滤另一个字段的下拉列表？
【发布时间】：2019-09-01 02:02:26
【问题描述】：

我创建了一个带有 ManytoManyField 的 Django-CMS 插件到另一个模型。在前端创建插件时，我希望用户能够过滤 ManytoManyField 列表（可能太长）。顺便说一句，这个未来已经在 Django 管理员上：

class ModelAdmin(admin.ModelAdmin):
    list_filter = ('field_name', )
    form = PartnerLogoTableForm

是否有可能在我的身上有类似的东西 cms_plugins.py：

class PartnerLogoTablePlugin(CMSPluginBase):
  model = LogoTablePlugin
  form = LogoTablePluginForm
  name = _('LogoTable Plugin')
  render_template = False
  search_fields = ('description',)

  def render(self, context, instance, placeholder):
    self.render_template = 'aldryn_logo_tables/plugins/%s/logotable.html' % instance.style

    context.update({
        'object': instance,
        'placeholder': placeholder,
    })
    return context


plugin_pool.register_plugin(PartnerLogoTablePlugin)

models.py：

class PartnerLogoTable(models.Model):

  name = models.CharField(_('Partner name'), max_length=255)
  image = FilerImageField(verbose_name=_('Image'), null=True, blank=True, on_delete=models.SET_NULL)
  partner_url = models.TextField(_('Partner url'), null=True, blank=True, validators=[URLValidator()])

  is_active = models.BooleanField(_('Is active'), blank=True, default=True)
  created_at = models.DateTimeField(_('Created at'), auto_now_add=True)
  updated_at = models.DateTimeField(_('Updated at'), auto_now=True)
  order = models.IntegerField(_('Order'), null=True, blank=True)

  class Meta:
    verbose_name = _('Partner Logo')
    verbose_name_plural = _('Partner Logos')
    ordering = ['order']

  def __str__(self):
    return self.name


class LogoTablePlugin(CMSPlugin):
  DEFAULT = 'default'
  LOGOTABLE_CHOICES = [
    (DEFAULT, _('Default')),
  ]

  description = models.CharField(_('Description'), max_length=255, null=True, blank=True)
  partner = models.ManyToManyField(PartnerLogoTable, verbose_name=_('Partner'))
  logo_per_row = models.IntegerField(_('Logo per line'), default=1, null=True, blank=True,
                                    validators=[MaxValueValidator(4), MinValueValidator(1)],
                                    help_text=_('Number of logos to be displayed per row'))
  style = models.CharField(_('Style'), choices=LOGOTABLE_CHOICES + get_additional_styles(), default=DEFAULT,
                         max_length=50, blank=True, null=True, )

  class Meta:
    verbose_name = _('Partner Logo Plugin')
    verbose_name_plural = _('Partner Logo Plugins')

  def __unicode__(self):
    return u'%s' % self.description

forms.py

class LogoTablePluginForm(forms.ModelForm):
  model = LogoTablePlugin

  def clean_style(self):
   .....
    return style


class PartnerLogoTableForm(forms.ModelForm):
  model = PartnerLogoTable

  def clean(self):
    ....

    return self.cleaned_data

This is how the plugin looks now

【问题讨论】：

标签： python django django-models django-cms django-filter

【解决方案1】：

来自django-autocomplete-light 的ModelSelect2Multiple 似乎非常适合您的用例。

【讨论】：