Magento 2产品集合显示查询

Question

I am having this weird issue, Can someone please point out what i am doing wrong.

I want to display the products in a category related to position added in another table, with following columns

id, category_id, product_id, position

In my module i extended the \\Magento\\Catalog\\Block\\Product\\ListProduct and \\Magento\\Catalog\\Block\\Product\\ProductList\\Toolbar

In the ListProduct file, i override _getProductCollection method and add the following

$joinConditions = array();
            $joinConditions[] = 'e.entity_id = rs.product_id';
            $joinConditions[] = 'rs.category_id = ' . $category->getId();
            $this->_productCollection->getSelect()->joinLeft(
                    ['rs' => 'my_new_table'], implode(' AND ', $joinConditions), ['position']
            );

And in the Toolbar i override setCollection method

switch ($this->getCurrentOrder())
        {
            case 'position':
                if ($this->getCurrentDirection() == 'desc')
                {
                    $this->_collection
                            ->getSelect()
                            ->order('rs.position DESC');
                } elseif ($this->getCurrentDirection() == 'asc')
                {
                    $this->_collection
                            ->getSelect()
                            ->order('rs.position ASC');
                }
                break;

            default:

                if ($this->getCurrentOrder())
                {
                    $this->_collection->setOrder($this->getCurrentOrder(), $this->getCurrentDirection());
                }
                break;
        }

I get the correct result, but FULL query gets displayed on all catalog pages. I have checked everywhere in my code. i do not print the query anywhere. The best part is if i change

case 'position':
                    if ($this->getCurrentDirection() == 'desc')
                    {
                        $this->_collection
                                ->getSelect()
                                ->order('rs.position DESC');
                    } elseif ($this->getCurrentDirection() == 'asc')
                    {
                        $this->_collection
                                ->getSelect()
                                ->order('rs.position ASC');
                    }
                    break;

TO

case 'position':
                    if ($this->getCurrentDirection() == 'desc')
                    {
                        $this->_collection
                                ->getSelect()
                                ->order('position DESC');
                    } elseif ($this->getCurrentDirection() == 'asc')
                    {
                        $this->_collection
                                ->getSelect()
                                ->order('position ASC');
                    }
                    break;

In the Toolbar class, removing 'rs' from order function. The order gets reverted to magento default position. but the query does not get displayed anymore

Any Idea ?

Answer 1

我认为，您应该从中删除-> getSelect（）并再次检查。