add validator, optimizations

app/Http/Requests/Admin/Shop/StoreArticlePost.php

@@ -14,10 +14,11 @@ class StoreArticlePost extends FormRequest
     public function rules()
     {
         return [
-            'ref' => 'required|unique:articles,ref,'.$this->ref,
+            'ref' => 'required|unique:shop_articles,ref,'.$this->id,
             'product_type' => 'required',
             'product_id' => 'required',
             'article_nature_id' => 'required',
+            'name' => 'required',
         ];
     }
 }

app/Http/Requests/Admin/Shop/StoreOfferPost.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Http\Requests\Admin\Shop;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class StoreOfferPost extends FormRequest
+{
+    public function authorize()
+    {
+        return true;
+    }
+
+    public function rules()
+    {
+        return [
+            'article_id' => 'required',
+            'variation_id' => 'required',
+            'tariff_id' => 'required',
+            'weight' => 'required',
+        ];
+    }
+}