fix : Category, Product 관련 테이블 정리 (Models, DB, seeder)

app/Models/Products/ProductComponent.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Models\Products;
+
+use App\Traits\BelongsToTenant;
+use App\Traits\ModelTrait;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class ProductComponent extends Model
+{
+    use SoftDeletes, BelongsToTenant, ModelTrait;
+
+    protected $table = 'product_components';
+
+    protected $fillable = [
+        'tenant_id','parent_product_id','child_product_id',
+        'quantity','sort_order','is_default',
+        'created_by','updated_by'
+    ];
+
+    protected $casts = [
+        'quantity'   => 'decimal:4',
+        'sort_order' => 'integer',
+        'is_default' => 'boolean',
+    ];
+
+    public function parent() { return $this->belongsTo(Product::class, 'parent_product_id'); }
+    public function child()  { return $this->belongsTo(Product::class, 'child_product_id'); }
+}