from django.contrib import admin
from django.urls import reverse
from django.utils.html import format_html
from django.utils.translation import gettext_lazy as _

#zr 禁用评论状态的管理动作
def disable_commentstatus(modeladmin, request, queryset):
    queryset.update(is_enable=False)

#zr 启用评论状态的管理动作
def enable_commentstatus(modeladmin, request, queryset):
    queryset.update(is_enable=True)

#zr 设置动作的描述信息
disable_commentstatus.short_description = _('Disable comments')
enable_commentstatus.short_description = _('Enable comments')

#zr 评论管理后台配置类
class CommentAdmin(admin.ModelAdmin):
    #zr 设置每页显示数量
    list_per_page = 20
    #zr 设置列表页显示的字段
    list_display = (
        'id',
        'body',
        'link_to_userinfo',
        'link_to_article',
        'is_enable',
        'creation_time')
    #zr 设置可点击链接的字段
    list_display_links = ('id', 'body', 'is_enable')
    #zr 设置过滤器字段
    list_filter = ('is_enable',)
    #zr 设置排除的表单字段
    exclude = ('creation_time', 'last_modify_time')
    #zr 设置可用的批量动作
    actions = [disable_commentstatus, enable_commentstatus]

    #zr 生成用户信息链接的方法
    def link_to_userinfo(self, obj):
        info = (obj.author._meta.app_label, obj.author._meta.model_name)
        link = reverse('admin:%s_%s_change' % info, args=(obj.author.id,))
        return format_html(
            u'<a href="%s">%s</a>' %
            (link, obj.author.nickname if obj.author.nickname else obj.author.email))

    #zr 生成文章链接的方法
    def link_to_article(self, obj):
        info = (obj.article._meta.app_label, obj.article._meta.model_name)
        link = reverse('admin:%s_%s_change' % info, args=(obj.article.id,))
        return format_html(
            u'<a href="%s">%s</a>' % (link, obj.article.title))

    #zr 设置自定义字段的显示名称
    link_to_userinfo.short_description = _('User')
    link_to_article.short_description = _('Article')