create crud product categories and partial update crud products with dealers stock

app/Models/Dealer.php

@@ -22,4 +22,10 @@ class Dealer extends Model
     {
         return $this->hasMany(Transaction::class, 'dealer_id', 'id');
     }
+
+    public function products(){
+        return $this->belongsToMany(Product::class, 'stock')
+        ->withPivot('quantity')
+        ->withTimestamps();
+    }
 }

app/Models/Product.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Product extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $fillable = ['code','name','description','product_category_id'];
+
+    public function category(){
+        return $this->belongsTo(ProductCategory::class, 'product_category_id');
+    }
+
+    public function dealers(){
+        return $this->belongsToMany(Dealer::class, 'stock')
+        ->withPivot('quantity')
+        ->withTimestamps();
+    }
+}

app/Models/ProductCategory.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class ProductCategory extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $fillable = ['name'];
+
+    public function products(){
+        return $this->hasMany(Product::class, 'product_category_id');
+    }
+}