9.如何在修改页面添加自定义的按钮

Villain有一个叫is_unique的字段

class Villain(Entity):
    ...
    is_unique = models.BooleanField(default=True)

你想在Villain页面添加一个叫“Make Unique”按钮让这个Villian唯一，其他的同名的villian都应该被删除。

你先扩展change_form添加一个按钮

{% extends 'admin/change_form.html' %}
{% block submit_buttons_bottom %}
    {{ block.super }}
    <div class="submit-row">
            <input type="submit" value="Make Unique" name="_make-unique">
    </div>
{% endblock %}

然后你可以覆盖response_change并将模板连接到VillainAdmin

@admin.register(Villain)
class VillainAdmin(admin.ModelAdmin, ExportCsvMixin):
    ...
    change_form_template = "entities/villain_changeform.html"
    def response_change(self, request, obj):
        if "_make-unique" in request.POST:
            matching_names_except_this = self.get_queryset(request).filter(name=obj.name).exclude(pk=obj.id)
            matching_names_except_this.delete()
            obj.is_unique = True
            obj.save()
            self.message_user(request, "This villain is now unique")
            return HttpResponseRedirect(".")
        return super().response_change(request, obj)

你现在的admin页面：