Add all files

app/Models/ConfigOptionProduct.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class ConfigOptionProduct extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'config_option_id',
+        'product_id',
+    ];
+
+    public $timestamps = false;
+
+    /**
+     * Get the option of the product.
+     */
+    public function configOption()
+    {
+        return $this->belongsTo(ConfigOption::class);
+    }
+
+    /**
+     * Get the product of the option.
+     */
+    public function product()
+    {
+        return $this->belongsTo(Product::class);
+    }
+}