Merge pull request #4017 from vishal-webkul/issue3950

Issue 3950 Fixed

packages/Webkul/Product/src/Repositories/ProductFlatRepository.php

@@ -87,6 +87,42 @@ class ProductFlatRepository extends Repository
         return $filterAttributes;
     }
 
+    /**
+     * filter attributes according to products
+     * 
+     * @param  array  $category
+     * @return \Illuminate\Support\Collection
+     */
+    public function getProductsRelatedFilterableAttributes($category) {
+        $products = app('Webkul\Product\Repositories\ProductRepository')->getProductsRelatedToCategory($category->id);
+
+        $filterAttributes = $this->getFilterableAttributes($category, $products);
+
+        $allProductAttributeOptionsCode = [];
+
+        foreach ($products as $key => $product) {
+            foreach ($filterAttributes as $attribute) {
+                if ($attribute->code <> 'price') {
+                    if (isset($product[$attribute->code])) {
+                        if (! in_array($product[$attribute->code], $allProductAttributeOptionsCode)) {
+                            array_push($allProductAttributeOptionsCode, $product[$attribute->code]);
+                        }
+                    }
+                }
+            }
+        }
+
+        foreach ($filterAttributes as $attribute) {
+            foreach ($attribute->options as $key => $option) {
+                if (! in_array($option->id, $allProductAttributeOptionsCode)) {
+                    unset($attribute->options[$key]);
+                }
+            }         
+        }   
+        
+        return $filterAttributes;
+
+    }
 
     /**
      * update product_flat custom column

packages/Webkul/Product/src/Repositories/ProductRepository.php

@@ -110,6 +110,23 @@ class ProductRepository extends Repository
         Event::dispatch('catalog.product.delete.after', $id);
     }
 
+     /**
+     * @param int $categoryId
+     *
+     * @return \Illuminate\Support\Collection
+     */
+    public function getProductsRelatedToCategory($categoryId = null)
+    {
+        $qb = $this->model
+            ->leftJoin('product_categories', 'products.id', '=', 'product_categories.product_id');
+
+        if ($categoryId) {
+            $qb->where('product_categories.category_id', $categoryId);
+        }    
+        
+        return $qb->get();
+    }
+
     /**
      * @param int $categoryId
      *

packages/Webkul/Shop/src/Resources/views/products/list/layered-navigation.blade.php

@@ -11,7 +11,7 @@
     if (isset($category)) {
         $products = $productRepository->getAll($category->id);
 
-        $filterAttributes = $productFlatRepository->getFilterableAttributes($category, $products);
+        $filterAttributes = $productFlatRepository->getProductsRelatedFilterableAttributes($category);
 
         $maxPrice = core()->convertPrice($productFlatRepository->getCategoryProductMaximumPrice($category));
     }

packages/Webkul/Velocity/src/Resources/views/shop/products/list/layered-navigation.blade.php

@@ -9,7 +9,7 @@
     if (isset($category)) {
         $products = $productRepository->getAll($category->id);
 
-        $filterAttributes = $productFlatRepository->getFilterableAttributes($category, $products);
+        $filterAttributes = $productFlatRepository->getProductsRelatedFilterableAttributes($category);
 
         $maxPrice = core()->convertPrice($productFlatRepository->getCategoryProductMaximumPrice($category));
     }