magento2 评论相关（reviews）

1. 产品详情页获取评论数和评分rating 错误，没法取得数据，那么

this->getProduct()->getRatingSummary() 数据从哪里来的呢

//监听事件
    <event name="catalog_block_product_list_collection">
        <observer name="review" instance="Magento\Review\Observer\CatalogProductListCollectionAppendSummaryFieldsObserver" shared="false" />
    </event>
//文件 vendor\magento\module-review\Observer\CatalogProductListCollectionAppendSummaryFieldsObserver.php
    public function execute(EventObserver $observer)
    {
        $productCollection = $observer->getEvent()->getCollection();
        $this->sumResourceFactory->create()->appendSummaryFieldsToCollection(
            $productCollection,
            (int)$this->storeManager->getStore()->getId(),
            \Magento\Review\Model\Review::ENTITY_PRODUCT_CODE
        );

        return $this;
    }
//文件 vendor\magento\module-review\Model\ResourceModel\Review\Summary.php
/**
     * Append review summary fields to product collection
     *
     * @param \Magento\Catalog\Model\ResourceModel\Product\Collection $productCollection
     * @param int $storeId
     * @param string $entityCode
     * @return Summary
     * @throws \Magento\Framework\Exception\LocalizedException
     */
    public function appendSummaryFieldsToCollection(
        \Magento\Catalog\Model\ResourceModel\Product\Collection $productCollection,
        int $storeId,
        string $entityCode
    ) {
        if (!$productCollection->isLoaded()) {
            $summaryEntitySubSelect = $this->getConnection()->select();
            $summaryEntitySubSelect
                ->from(
                    ['review_entity' => $this->getTable('review_entity')],
                    ['entity_id']
                )->where(
                    'entity_code = ?',
                    $entityCode
                );
            $joinCond = new \Zend_Db_Expr(
                "e.entity_id = review_summary.entity_pk_value AND review_summary.store_id = {$storeId}"
                . " AND review_summary.entity_type = ({$summaryEntitySubSelect})"
            );
            $productCollection->getSelect()
                ->joinLeft(
                    ['review_summary' => $this->getMainTable()],
                    $joinCond,
                    [
                        'reviews_count' => new \Zend_Db_Expr("IFNULL(review_summary.reviews_count, 0)"),
                        'rating_summary' => new \Zend_Db_Expr("IFNULL(review_summary.rating_summary, 0)")
                    ]
                );
        }

        return $this;
    }

2. 评论不想区分站点，也就是多语言下都显示同一批评论

需要将store id 过滤的删掉

//重写 \Magento\Review\Model\ResourceModel\Review\Collection
class Collection extends \Magento\Review\Model\ResourceModel\Review\Collection
//重写方法 
    public function addStoreFilter($storeId)
    {
        /**注释掉这些，去除store_id过滤
        $inCond = $this->getConnection()->prepareSqlCondition('store.store_id', ['in' => $storeId]);
        $this->getSelect()->join(
            ['store' => $this->getReviewStoreTable()],
            'main_table.review_id=store.review_id',
            []
        );
        $this->getSelect()->where($inCond);
        */
        return $this;
    }