django admin 对 list_filter 排序

from django.db import models
from django.db.models.signals import post_save
from django.contrib.auth import get_user_model
from django.template.defaultfilters import slugify

from DjangoUeditor.models import UEditorField
from pyquery import PyQuery as pq  # pip install pyquery,获取到html中的img图片地址返回
from pypinyin import lazy_pinyin

User = get_user_model()


# Create your models here.

class Node(models.Model):
    """
    节点表
    """
    name = models.CharField(max_length=128, unique=True, verbose_name="节点名称")

    # SlugField 是一个新闻术语（通常叫做短标题）。一个 slug 只能包含字母、数字、下划线或者是连字符，通常用来作为短标签。通常它们是用来放在地址栏的URL里的。
    # 像 CharField一样，你可以指定 max_length（也请参阅该部分中的有关数据库可移植性的说明和 max_length）。如果没有指定
    # max_length, Django将会默认长度为50。
    # 将Field.db_index设置为True。
    # 根据某些其他值的值自动预填充SlugField通常很有用。你可以在admin中使用 prepopulated_fields 自动执行此操作。
    slug = models.SlugField(max_length=128, unique=True, verbose_name="url标识符")
    create_time = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
    num_topics = models.IntegerField(default=0, verbose_name="主题数量")
    category = models.ForeignKey(Category, verbose_name="所属类别")
    is_show = models.BooleanField(default=True, verbose_name="显示状态")

    def save(self, *args, **kwargs):
        self.slug = slugify("-".join(lazy_pinyin(self.name)))
        super(Node, self).save(*args, **kwargs)

    class Meta:
        verbose_name = "节点"
        verbose_name_plural = "节点列表"

    def __str__(self):
        return self.name


class Article(models.Model):
    """
    主题表/文章表
    """
    title = models.CharField(max_length=128, verbose_name="标题")
    slug = models.SlugField(max_length=128, unique=True, verbose_name="url标识符")
    content = UEditorField(verbose_name="内容", imagePath="blog/images/", width=1000, height=300,
                           filePath="blog/files/", default='')
    node = models.ForeignKey(Node, verbose_name="所属节点")
    user = models.ForeignKey(User, related_name="user_article", verbose_name="作者")
    source = models.ForeignKey(Source, verbose_name="来源", blank=True, null=True)
    tags = models.ManyToManyField(Tag, verbose_name="标签", related_name="tags_article", blank=True)
    num_views = models.IntegerField(default=0, verbose_name="浏览数量")
    num_favorites = models.IntegerField(default=0, verbose_name="收藏数量")
    last_answerer = models.ForeignKey(User, related_name="last_answerer_article", verbose_name="最后回复者", blank=True,
                                      null=True)
    is_show = models.BooleanField(default=True, verbose_name="显示状态")
    create_time = models.DateTimeField(auto_now_add=True, verbose_name="发表时间")
    update_time = models.DateTimeField(blank=True, null=True, auto_now=True, verbose_name="更新时间")

    def save(self, *args, **kwargs):
        self.slug = slugify("-".join(lazy_pinyin(self.title)))
        super(Article, self).save(*args, **kwargs)

    # 获取后台文本编辑器图文内容中图片url地址
    def get_content_img_url(self):
        temp = Article.objects.filter(pk=str(self.id)).values('content')  # values获取Article数据表中的content字段内容
        html = pq(temp[0]['content'])  # pq方法获取编辑器html内容
        # print(html, "\n", "----")
        img_path = pq(html)('img').attr('src')  # 截取html内容中的路径
        # print("pic", img_path)
        return img_path  # 返回第一张图片路径

    class Meta:
        verbose_name = "文章"
        verbose_name_plural = "文章列表"

    def __str__(self):
        title_short = self.title if len(self.title) < 15 else self.title[:12] + '...'
        return "%s %s %s" % (self.id, self.user, title_short)

from django.contrib import admin
from django.forms import widgets
from apps.blog.models import *
from apps.blog.forms import ArticleAdminForm
from django.contrib.admin import SimpleListFilter


class NodeFilter(SimpleListFilter):
    title = 'node'  # or use _('country') for translated title
    parameter_name = 'node'

    def lookups(self, request, model_admin):
        # 查出 node 的 id 和 name 值 用来显示在网页上的筛选条件
        nodes = Node.objects.all()
        return [(node.id, node.name + "-自定义") for node in nodes]

    def queryset(self, request, queryset):
        if self.value():
            # 筛选条件有值时, 查询对应的 node 的文章，用 title 正排序
            return queryset.filter(node__id=self.value()).order_by("title")
        else:
            # 筛选条件没有值时，全部的时候是没有值的
            return queryset


class ArticleAdmin(admin.ModelAdmin):
    form = ArticleAdminForm  # 指定了表单，就不要再用 formfield_overrides 了

    list_display = ['id', 'thumb_shouw', 'title', 'node', 'num_views', 'show_status', 'slug', 'user', 'time_create']
    list_display_links = ['id', 'thumb_shouw', 'title', 'node', 'num_views', 'user']
    list_filter = ['id', 'source__name', NodeFilter]  # 把自己的筛选添加加进来
    search_fields = ['title_short', 'user', 'content']
    list_editable = ["show_status", ]
    # style_fields = {"content": "ueditor"}
    readonly_fields = ('slug',)
    show_detail_fields = ['show_status', ]