optimizations

app/Models/CollectionMergeAction.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class CollectionMergeAction extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'source_collection_id',
+        'target_collection_id',
+        'action_type',
+        'actor_user_id',
+        'summary',
+    ];
+
+    public function sourceCollection(): BelongsTo
+    {
+        return $this->belongsTo(Collection::class, 'source_collection_id');
+    }
+
+    public function targetCollection(): BelongsTo
+    {
+        return $this->belongsTo(Collection::class, 'target_collection_id');
+    }
+
+    public function actor(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'actor_user_id');
+    }
+}