refactor(catalog): Complete catalog refactor to simplify its data model and its querying.

source commits: refactor/catalog

app/Domains/Purchase/Models/Purchase.php

@@ -119,7 +119,7 @@ class Purchase extends Model
 
         $cart = $this->relationLoaded('cart')
             ? $this->getRelation('cart')
-            : $this->cart()->with('items.buyable')->first();
+            : $this->cart()->with(['items.catalogItem', 'items.variant'])->first();
 
         if (! $cart) {
             return 0.0;

app/Domains/Purchase/Models/PurchaseItem.php

@@ -2,7 +2,7 @@
 
 namespace App\Domains\Purchase\Models;
 
-use App\Domains\Catalog\Models\ProductVariant;
+use App\Domains\Attachable\Models\Attachment;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -10,8 +10,14 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 #[Fillable([
     'compra_id',
-    'buyable_id',
-    'buyable_type',
+    'source_catalog_item_id',
+    'source_variant_id',
+    'image_attachment_id',
+    'nombre',
+    'descripcion',
+    'slug',
+    'item_nombre',
+    'variant_attributes',
     'cantidad',
     'precio_unitario',
     'discount_total',
@@ -28,8 +34,10 @@ class PurchaseItem extends Model
     {
         return [
             'compra_id' => 'integer',
-            'buyable_id' => 'integer',
-            'buyable_type' => 'string',
+            'source_catalog_item_id' => 'integer',
+            'source_variant_id' => 'integer',
+            'image_attachment_id' => 'integer',
+            'variant_attributes' => 'array',
             'cantidad' => 'integer',
             'precio_unitario' => 'decimal:2',
             'discount_total' => 'decimal:2',
@@ -46,11 +54,9 @@ class PurchaseItem extends Model
         return $this->belongsTo(Purchase::class, 'compra_id');
     }
 
-    /**
-     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
-     */
-    public function buyable()
+    /** @return BelongsTo<Attachment, $this> */
+    public function imageAttachment(): BelongsTo
     {
-        return $this->morphTo();
+        return $this->belongsTo(Attachment::class, 'image_attachment_id');
     }
 }