MAGETWO-45651: Simple product don't shown as associated in grouped when set out of stock

Author: kandy

app/code/Magento/Catalog/Model/Product/Link.php

@@ -49,11 +49,6 @@ class Link extends \Magento\Framework\Model\AbstractModel
      */
     protected $_linkCollectionFactory;
 
-    /**
-     * @var \Magento\CatalogInventory\Helper\Stock
-     */
-    protected $stockHelper;
-
     /**
      * @param \Magento\Framework\Model\Context $context
      * @param \Magento\Framework\Registry $registry
@@ -69,14 +64,12 @@ public function __construct(
         \Magento\Framework\Registry $registry,
         \Magento\Catalog\Model\ResourceModel\Product\Link\CollectionFactory $linkCollectionFactory,
         \Magento\Catalog\Model\ResourceModel\Product\Link\Product\CollectionFactory $productCollectionFactory,
-        \Magento\CatalogInventory\Helper\Stock $stockHelper,
         \Magento\Framework\Model\ResourceModel\AbstractResource $resource = null,
         \Magento\Framework\Data\Collection\AbstractDb $resourceCollection = null,
         array $data = []
     ) {
         $this->_linkCollectionFactory = $linkCollectionFactory;
         $this->_productCollectionFactory = $productCollectionFactory;
-        $this->stockHelper = $stockHelper;
         parent::__construct($context, $registry, $resource, $resourceCollection, $data);
     }
 
@@ -136,7 +129,6 @@ public function getAttributeTypeTable($type)
     public function getProductCollection()
     {
         $collection = $this->_productCollectionFactory->create()->setLinkModel($this);
-        $this->stockHelper->addInStockFilterToCollection($collection);
         return $collection;
     }
 

app/code/Magento/CatalogInventory/Model/Plugin/ProductLinks.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: akasian
+ * Date: 11/17/15
+ * Time: 12:29 PM
+ */
+
+namespace Magento\CatalogInventory\Model\Plugin;
+
+use Magento\Catalog\Model\Product\Link;
+use Magento\Catalog\Model\ResourceModel\Product\Link\Product\Collection;
+use Magento\CatalogInventory\Helper\Stock;
+use Magento\CatalogInventory\Model\Configuration;
+
+class ProductLinks
+{
+    /**
+     * @var Configuration
+     */
+    private $configuration;
+
+    /**
+     * @var Stock
+     */
+    private $stockHelper;
+
+    /**
+     * ProductLinks constructor.
+     *
+     * @param Configuration $configuration
+     * @param Stock $stockHelper
+     */
+    public function __construct(Configuration $configuration, Stock $stockHelper)
+    {
+        $this->configuration = $configuration;
+        $this->stockHelper = $stockHelper;
+    }
+
+    /**
+     * @param Link $subject
+     * @param Collection $collection
+     * @return Collection
+     */
+    public function afterGetProductCollection(Link $subject, Collection $collection)
+    {
+        if ($this->configuration->isShowOutOfStock() != 1) {
+            $this->stockHelper->addInStockFilterToCollection($collection);
+        }
+        return $collection;
+    }
+}

app/code/Magento/CatalogInventory/etc/frontend/di.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © 2015 Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
+    <type name="Magento\Catalog\Model\Product\Link">
+        <plugin name="isInStockFilter" type="Magento\CatalogInventory\Model\Plugin\ProductLinks" />
+    </type>
+</config>