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.deploy/artwork-evolution-release/app/Models/PostTarget.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * Polymorphic-style target attached to a Post.
+ * For v1: target_type = 'artwork', target_id = artworks.id
+ */
+class PostTarget extends Model
+{
+    protected $table = 'post_targets';
+
+    public $timestamps = false;
+
+    protected $fillable = [
+        'post_id',
+        'target_type',
+        'target_id',
+    ];
+
+    protected $casts = [
+        'created_at' => 'datetime',
+    ];
+
+    const CREATED_AT = 'created_at';
+    const UPDATED_AT = null;
+
+    public function post(): BelongsTo
+    {
+        return $this->belongsTo(Post::class);
+    }
+
+    /** Resolved Artwork when target_type = 'artwork' */
+    public function artwork(): BelongsTo
+    {
+        return $this->belongsTo(Artwork::class, 'target_id');
+    }
+}