调整分类

app/Models/Article.php

@@ -4,18 +4,21 @@ namespace App\Models;
 
 use App\Models\Traits\BelongsToCategory;
 use App\Models\Traits\HasOneCover;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Arr;
 
 class Article extends Model
 {
 
-    use HasOneCover, BelongsToCategory;
+    use HasOneCover;
 
-    public function getLinkAttribute()
+    public function getLinkAttribute(): string
     {
         return route('article.show', $this);
     }
-    
-    public function get_content_cover()
+
+    public function get_content_cover(): string
     {
         preg_match("/<img.*?src=\"([^\"]+)\"[^>].*?>/isU", str_ireplace("\\", "", $this->content), $matches);
 
@@ -26,6 +29,22 @@ class Article extends Model
         }
     }
 
+    /**
+     * Notes: 关联分类的中间表
+     * @Author: 玄尘
+     * @Date  : 2021/4/1 15:19
+     */
+    public function article_categories(): HasMany
+    {
+        return $this->hasMany(ArticleCategory::class);
+    }
+
+    public function categories(): BelongsToMany
+    {
+        return $this->belongsToMany(Category::class)
+                    ->using(ArticleCategory::class);
+    }
+
     /**
      * Notes: 获取一个默认图片
      * @Author: 玄尘