feat(attachments): refactor attachment management to use attachable pivot table and update related models and tests

app/Domains/Attachable/Models/AttachableAttachment.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Domains\Attachable\Models;
+
+use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
+
+#[Fillable([
+    'attachable_type',
+    'attachable_id',
+    'attachment_id',
+])]
+class AttachableAttachment extends Model
+{
+    protected $table = 'attachable_attachments';
+
+    public $timestamps = false;
+
+    protected function casts(): array
+    {
+        return [
+            'attachable_id' => 'integer',
+            'attachment_id' => 'integer',
+        ];
+    }
+
+    /**
+     * @return MorphTo<Model, $this>
+     */
+    public function attachable(): MorphTo
+    {
+        return $this->morphTo();
+    }
+
+    /**
+     * @return BelongsTo<Attachment, $this>
+     */
+    public function attachment(): BelongsTo
+    {
+        return $this->belongsTo(Attachment::class, 'attachment_id');
+    }
+}

app/Domains/Attachable/Models/Attachment.php

@@ -6,12 +6,10 @@ use App\Domains\Attachable\Enums\AttachmentType;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\MorphTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Support\Str;
 
 #[Fillable([
-    'attachable_type',
-    'attachable_id',
     'key',
     'path',
     'filename',
@@ -38,17 +36,16 @@ class Attachment extends Model
     protected function casts(): array
     {
         return [
-            'attachable_id' => 'integer',
             'type' => AttachmentType::class,
             'size' => 'integer',
         ];
     }
 
     /**
-     * @return MorphTo<Model, $this>
+     * @return HasMany<AttachableAttachment, $this>
      */
-    public function attachable(): MorphTo
+    public function attachables(): HasMany
     {
-        return $this->morphTo();
+        return $this->hasMany(AttachableAttachment::class, 'attachment_id');
     }
 }

app/Domains/Attachable/Models/Concerns/HasAttachments.php

@@ -4,15 +4,21 @@ namespace App\Domains\Attachable\Models\Concerns;
 
 use App\Domains\Attachable\Models\Attachment;
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\MorphMany;
+use Illuminate\Database\Eloquent\Relations\MorphToMany;
 
 trait HasAttachments
 {
     /**
-     * @return MorphMany<Attachment, Model>
+     * @return MorphToMany<Attachment, Model, $this>
      */
-    public function attachments(): MorphMany
+    public function attachments(): MorphToMany
     {
-        return $this->morphMany(Attachment::class, 'attachable');
+        return $this->morphToMany(
+            Attachment::class,
+            'attachable',
+            'attachable_attachments',
+            'attachable_id',
+            'attachment_id',
+        );
     }
 }