Django:重写RelatedFieldWidgetWrapper

您需要为modeladmin创建自定义的modelform,并覆盖其中的小部件。

示例代码:

#forms.py
class CustomForm(forms.ModelForm):
    user = forms.ModelChoiceField(queryset=User.objects.all(), widget=yourCustomWidget)

class Meta:
    model = MyModel

#admin.py
class MyModelAdmin(admin.ModelAdmin):
     form = CustomForm

我通过猴子修补小部件来处理这一点略有不同——这样,变化就反映在所有形式中,而您不必胡乱摆弄Django的源代码。

我在做定制时遇到了这个问题 yawd admin 一个非常好的twitter引导皮肤管理界面。现在,我所有的图标都被放大了。

import django.contrib.admin.widgets

class MyRelatedFieldWidgetWrapper(django.contrib.admin.widgets.RelatedFieldWidgetWrapper):
    """
    This class is a wrapper to a given widget to add the add icon for the
    admin interface.
    """
    def render(self, name, value, *args, **kwargs):
        rel_to = self.rel.to
        info = (rel_to._meta.app_label, rel_to._meta.model_name)
        self.widget.choices = self.choices
        output = [self.widget.render(name, value, *args, **kwargs)]
        if self.can_add_related:
            related_url = reverse(
                'admin:%s_%s_add' 
                % info, current_app=self.admin_site.name
            )
            output.append(
            """
            <a  href="%s"
                onclick="return showAddAnotherPopup(this);
                alt="%s">

                <i class="help icon-large icon-plus-sign"
                    id="add_id_%s"
                    data-original-title>
                </i>
            </a>""" % (related_url, _('Add Another'), name))
            return mark_safe(''.join(output))

# Monkeypatch it
django.contrib.admin.widgets.RelatedFieldWidgetWrapper = MyRelatedFieldWidgetWrapper