Django：在ModelForm中为ForeignKey添加“添加新”按钮

Django：在ModelForm中为ForeignKey添加“添加新”按钮

我已经在一个自定义小部件中解决了它。我不记得我是从Django管理员那儿学来的，还是从头开始构建的。

因此，形式为：

class OrderNewForm(forms.ModelForm):   client = forms.ModelChoiceField(       required=False,       queryset=Client.objects.all(),       widget=RelatedFieldWidgetCanAdd(Client, related_url="so_client_add")          )   class meta:       model = Order       fields = ('pre', 'client')

呈现“ +”按钮并链接到管理界面中的添加d出窗口或链接至你使用related_url参数提供的自定义视图的小部件是：

from django.core.urlresolvers import reversefrom django.utils.safestring import mark_safefrom django.forms import widgetsfrom django.conf import settingsclass RelatedFieldWidgetCanAdd(widgets.Select):    def __init__(self, related_model, related_url=None, *args, **kw):        super(RelatedFieldWidgetCanAdd, self).__init__(*args, **kw)        if not related_url: rel_to = related_model info = (rel_to._meta.app_label, rel_to._meta.object_name.lower()) related_url = 'admin:%s_%s_add' % info        # Be careful that here "reverse" is not allowed        self.related_url = related_url    def render(self, name, value, *args, **kwargs):        self.related_url = reverse(self.related_url)        output = [super(RelatedFieldWidgetCanAdd, self).render(name, value, *args, **kwargs)]        output.append(u'<a href="%s"  id="add_id_%s" onclick="return showAddAnotherPopup(this);"> ' %  (self.related_url, name))        output.append(u'<img src="%sadmin/img/icon_addlink.gif" width="10" height="10" alt="%s"/></a>' % (settings.STATIC_URL, _('Add Another')))  return mark_safe(u''.join(output))