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web10/app/Models/Article.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Article extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'title',
+        'slug',
+        'summary',
+        'content_md',
+        'cover',
+        'author',
+        'view_count',
+        'status',
+        'published_at',
+        'seo_title',
+        'seo_description',
+    ];
+
+    protected $casts = [
+        'published_at' => 'datetime',
+    ];
+
+    public function tags()
+    {
+        return $this->belongsToMany(Tag::class)->withTimestamps();
+    }
+
+    public function comments()
+    {
+        return $this->hasMany(Comment::class, 'target_id')
+            ->where('target_type', 'article');
+    }
+
+    public function scopePublished($query)
+    {
+        return $query->where('status', 'published');
+    }
+}