update. 优化模板结构

base/admin.py

@@ -1,7 +1,8 @@
-from django.contrib import admin
+from django.contrib import admin, messages
+from django.core.cache import cache
 from import_export.admin import ImportExportModelAdmin
 
-from base.models import MainMenu, BaseInfo, LinkCategory, FriendLink
+from base.models import MainMenu, BaseInfo, LinkCategory, FriendLink, PictureLink
 
 
 # —————— 主菜单 ——————
@@ -60,6 +61,25 @@ class FriendLinkAdmin(ImportExportModelAdmin):
         return super().formfield_for_foreignkey(db_field, request, **kwargs)
 
 
+@admin.register(PictureLink)
+class PictureLinkAdmin(admin.ModelAdmin):
+    list_display = ['name', 'order', 'is_active', 'created_at']
+
+    def save_model(self, request, obj, form, change):
+        # 1. 先执行 Model 的 save 方法（这里会触发逻辑判断和消息暂存）
+        super().save_model(request, obj, form, change)
+
+        # 2. 【关键】检查有没有暂存的消息
+        # 获取 key（如果是新建对象，obj.pk 此时已经有了，如果是内存中的临时对象则用 id）
+        msg_key = obj.pk if obj.pk else id(obj)
+        key = f"picture_count_limit_{msg_key}"
+        msg = cache.get(key)  # 缓存 30 秒
+        if msg:
+            # 取出消息并弹窗
+            cache.delete(key)
+            self.message_user(request, msg, level=messages.WARNING)
+
+
 # —————— 页脚链接 ——————
 @admin.register(BaseInfo)
 class BaseInfoAdmin(ImportExportModelAdmin):

base/context_processors.py

@@ -1,4 +1,4 @@
-from base.models import BaseInfo, LinkCategory, MainMenu
+from base.models import BaseInfo, LinkCategory, MainMenu, PictureLink
 
 
 def site_info(request):
@@ -8,9 +8,10 @@ def site_info(request):
     site_info_obj = BaseInfo.objects.filter(is_active=True).first()
     link_categories = LinkCategory.objects.filter(is_active=True).prefetch_related('links')
     menus = MainMenu.objects.filter(visible=True, parent__isnull=True).order_by('order')
-
+    picture_links = PictureLink.objects.filter(is_active=True).order_by('order')
     return {
         'site_info': site_info_obj,
         'link_categories': link_categories,
         'menus': menus,
+        'picture_links': picture_links,
     }

base/migrations/0004_picturelink.py

@@ -0,0 +1,31 @@
+# Generated by Django 6.0.3 on 2026-04-02 01:10
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('base', '0003_baseinfo_delete_footerlink'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PictureLink',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='创建时间')),
+                ('updated_at', models.DateTimeField(auto_now=True, verbose_name='更新时间')),
+                ('name', models.CharField(max_length=100, verbose_name='网站名称')),
+                ('picture', models.ImageField(help_text='建议尺寸：280x120', upload_to='picture/%Y/%m/%d/', verbose_name='图片链接')),
+                ('url', models.URLField(help_text='点击图片要访问的站点地址', verbose_name='链接地址')),
+                ('order', models.IntegerField(default=0, verbose_name='排序')),
+                ('is_active', models.BooleanField(default=True, verbose_name='是否启用')),
+            ],
+            options={
+                'verbose_name': '图片链接',
+                'verbose_name_plural': '图链管理',
+                'ordering': ['order', '-created_at'],
+            },
+        ),
+    ]

base/models.py

@@ -1,3 +1,4 @@
+from django.core.cache import cache
 from django.core.exceptions import ValidationError
 from django.db import models
 
@@ -49,6 +50,42 @@ class FriendLink(BaseEntity):
         return f"[{self.category.name}] {self.name}"
 
 
+class PictureLink(BaseEntity):
+    name = models.CharField("网站名称", max_length=100)
+    picture = models.ImageField("图片链接", upload_to='picture/%Y/%m/%d/', help_text="建议尺寸：280x120")
+    url = models.URLField("链接地址", help_text="点击图片要访问的站点地址")
+
+    # 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 = "图片链接"
+        verbose_name_plural = "图链管理"
+        ordering = ['order', '-created_at']
+
+    def __str__(self):
+        return f"{self.name}"
+
+    def save(self, *args, **kwargs):
+        # 1. 逻辑判断：如果当前想要启用
+        if self.is_active:
+            # 统计现有的启用数量（排除自己）
+            active_count = PictureLink.objects.filter(is_active=True).exclude(pk=self.pk).count()
+
+            # 2. 如果已满 4 个
+            if active_count >= 4:
+                self.is_active = False  # 强制设为不生效
+
+                # 3. 【关键】把消息暂存起来，key 用 pk（如果是新建还没 pk，用 id(self) 临时顶替）
+                # 注意：这里不能直接弹窗，因为没有 request
+                msg_key = self.pk if self.pk else id(self)
+                msg = "限制生效：最多只能有 4 个启用的链接，当前对象已被自动设置为【不启用】。"
+                cache.set(f"picture_count_limit_{msg_key}", msg)  # 缓存 30 秒
+
+        super().save(*args, **kwargs)
+
+
 class MainMenu(BaseEntity):
     # --- 基础信息 ---
     title = models.CharField("标题", max_length=100)