update. 完成前端页面展示、列表和详情页

update. 调整融合主菜单与板块
update. 分离新闻模块

base/models.py

@@ -1,27 +1,144 @@
+from django.core.exceptions import ValidationError
 from django.db import models
 
+from common.base import BaseEntity
+
+
 # Create your models here.
-class MainMenu(models.Model):
-    title = models.CharField("菜单标题", max_length=50)
-    url = models.CharField("链接地址", max_length=200, help_text="如 /news/ 或 外链 https://xxx")
-    is_external = models.BooleanField("是否外链", default=False)
-    parent = models.ForeignKey('self', on_delete=models.CASCADE, null=True, blank=True, verbose_name="父菜单")
-    order = models.IntegerField("排序", default=0)
-    visible = models.BooleanField("是否显示", default=True)
+
+
+# --- 新增：友情链接分类模型 ---
+class LinkCategory(BaseEntity):
+    name = models.CharField("分类名称", max_length=50, unique=True)  # 分类名，如"政府网站"
+    code = models.SlugField("分类代码", max_length=50, unique=True, help_text="用于前端模板调用的标识，如 'gov', 'fire'")
+    order = models.IntegerField("显示排序", default=0)  # 分类本身的排序
+    is_active = models.BooleanField("是否启用", default=True)
 
     class Meta:
-        verbose_name = "主菜单"
-        verbose_name_plural = "主菜单管理"
+        verbose_name = "友链分类"
+        verbose_name_plural = "友链分类"
+        ordering = ['order']
 
     def __str__(self):
-        return self.title
+        return self.name
 
 
-class FooterLink(models.Model):
-    title = models.CharField("链接文字", max_length=50)
-    url = models.URLField("链接地址")
+# --- 修改：友情链接模型 ---
+class FriendLink(BaseEntity):
+    # 1. 关联到新的分类模型（一对多关系：一个分类下有多个链接）
+    category = models.ForeignKey(
+        LinkCategory,
+        on_delete=models.CASCADE,  # 如果分类被删，关联的链接也删除
+        verbose_name="所属分类",
+        related_name='links'  # 反向查询名称，方便后续调用
+    )
+
+    name = models.CharField("网站名称", max_length=100)
+    url = models.URLField("链接地址", max_length=200)
+
+    # 2. 排序和状态
     order = models.IntegerField("排序", default=0)
+    is_active = models.BooleanField("是否启用", default=True)
 
     class Meta:
-        verbose_name = "页脚链接"
+        verbose_name = "友情链接"
+        verbose_name_plural = "友链管理"
+        ordering = ['order', '-created_at']
+
+    def __str__(self):
+        return f"[{self.category.name}] {self.name}"
+
+
+class MainMenu(BaseEntity):
+    # --- 基础信息 ---
+    title = models.CharField("标题", max_length=100)
+    code = models.SlugField("唯一标识", max_length=50, unique=True, help_text="用于URL或模板识别，建议英文")
+
+    # --- 树形结构 ---
+    parent = models.ForeignKey(
+        'self',
+        on_delete=models.CASCADE,
+        null=True,
+        blank=True,
+        related_name='children',
+        verbose_name="父级节点"
+    )
+
+    # --- 菜单特有属性 ---
+    # 只有顶级节点（主菜单）才需要填写这个，子节点作为板块时通常不需要跳转链接
+    url = models.CharField("链接地址", max_length=200, blank=True, help_text="如 /menu/news.html 或 外链")
+    is_external = models.BooleanField("是否外链", default=False)
+    is_carousel = models.BooleanField("轮播图", default=False)
+
+    # --- 通用属性 ---
+    order = models.PositiveSmallIntegerField("排序权重", default=0)
+    visible = models.BooleanField("显示状态", default=True)
+
+    class Meta:
+        verbose_name = "站点导航"
+        verbose_name_plural = "站点导航"
+        ordering = ('order', 'title')
+
+    def __str__(self):
+        # 显示层级路径，例如：新闻中心 → 国内新闻
+        if self.parent:
+            return f"{self.parent.title} → {self.title}"
+        return self.title
+
+    def clean(self):
+        super().clean()
+        # 限制层级：最多 2 级
+        if self.parent and self.parent.parent:
+            raise ValidationError('层级过深：子节点不能再设置子级，最多只允许两级结构。')
+
+        # 防止自引用
+        if self.pk and self.parent and self.parent.pk == self.pk:
+            raise ValidationError('节点不能以自身为父级。')
+
+    # --- 核心逻辑属性 ---
+    @property
+    def is_sub(self):
+        """是否为子板块（即是否有父级）"""
+        return self.parent is not None
+
+    @property
+    def is_main(self):
+        """是否为主菜单（即是否无父级）"""
+        return not self.parent
+
+    @property
+    def active_children(self):
+        """
+        获取当前节点下可见的子节点（用于前端导航渲染）
+        """
+        return self.children.filter(visible=True)
+
+
+class FooterLink(BaseEntity):
+    title = models.CharField("页脚信息", max_length=50)
+    address = models.CharField("单位地址", max_length=200)
+    postal = models.CharField("邮编", default="")
+    telephone = models.CharField("服务热线", default="")
+    fax = models.CharField("传真", default="")
+    unit = models.CharField("版权单位", default="")
+    filing = models.CharField("备案号", default="")
+    official_account = models.ImageField("公众号二维码", default="", upload_to='carousel/')
+    weibo = models.ImageField("微博二维码", default="", upload_to='carousel/')
+    is_active = models.BooleanField("生效", default=False)
+
+    class Meta:
+        verbose_name = "页脚信息"
         verbose_name_plural = "页脚管理"
+
+    def __str__(self):
+        return f"{self.title} - 状态：{'使用中' if self.is_active else '已停用'}"
+
+    def save(self, *args, **kwargs):
+        # 1. 如果当前这条数据被标记为“生效” (is_active=True)
+        if self.is_active:
+            # 2. 将数据库中【除了当前这条】以外的所有 FooterLink 都更新为“不生效”
+            # self.pk 是当前对象的唯一标识
+            FooterLink.objects.exclude(pk=self.pk).update(is_active=False)
+
+        # 3. 执行正常的保存操作
+        super().save(*args, **kwargs)