Magento2需要使用UI组件构建具有多个表集合的Grid

从构建自定义模块开始，它具有显示GRID视图的功能，需要将其联接到集合中的多个表并在GRID和过滤器上呈现它们。

我使用了magento2的UI组件，但是无法完成将多个表联接到集合中并准备网格视图的任务。

任何人都可以帮助我。

我创建了具有两个自定义表的联接的管理网格。您无法通过使用di.xml中的虚拟类型来执行此操作，因此您需要按照以下步骤操作并更新您的

etc / di.xml，

Model / Resource / Modulename / Collection.php在此文件中添加联接，

型号/资源/模块名称/网格/Collection.php，

在您的etc / di.xml中

<type name="Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory">
        <arguments>
            <argument name="collections" xsi:type="array">
                <item name="namespace_modulename_listing_data_source" xsi:type="string">Namespace\Modulename\Model\Resource\Modulename\Grid\Collection</item>
            </argument>
        </arguments>
</type>
<type name="Namespace\Modulename\Model\Resource\Modulename\Grid\Collection">
    <arguments>
        <argument name="mainTable" xsi:type="string">tablename</argument>
        <argument name="eventPrefix" xsi:type="string">namespace_modulename_grid_collection</argument>
        <argument name="eventObject" xsi:type="string">namespace_grid_collection</argument>
        <argument name="resourceModel" xsi:type="string">Namespace\Modulename\Model\Resource\Modulename</argument>
    </arguments>
</type>

在您的Model / Resource / Modulename / Collection.php中

<?php
namespace Namespace\Modulename\Model\Resource\Modulename;

use Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection;

class Collection extends AbstractCollection
{
    /**
     * Define model & resource model
     */
    const YOUR_TABLE = 'tablename';

    public function __construct(
        \Magento\Framework\Data\Collection\EntityFactoryInterface $entityFactory,
        \Psr\Log\LoggerInterface $logger,
        \Magento\Framework\Data\Collection\Db\FetchStrategyInterface $fetchStrategy,
        \Magento\Framework\Event\ManagerInterface $eventManager,
        \Magento\Store\Model\StoreManagerInterface $storeManager,
        \Magento\Framework\DB\Adapter\AdapterInterface $connection = null,
        \Magento\Framework\Model\ResourceModel\Db\AbstractDb $resource = null
    ) {
        $this->_init(
            'Namespace\Modulename\Model\Modulename',
            'Namespace\Modulename\Model\Resource\Modulename'
        );
        parent::__construct(
            $entityFactory, $logger, $fetchStrategy, $eventManager, $connection,
            $resource
        );
        $this->storeManager = $storeManager;
    }
    protected function _initSelect()
    {
        parent::_initSelect();

        $this->getSelect()->joinLeft(
                ['secondTable' => $this->getTable('tablename')],
                'main_table.columnname = secondTable.columnname',
                ['columnname1','columnname2','columnname3']
            );
    }
}
?>

在您的Model / Resource / Modulename / Grid / Collection.php中

<?php
namespace Namespace\Modulename\Model\Resource\Modulename\Grid;

use Magento\Framework\Api\Search\SearchResultInterface;
use Magento\Framework\Search\AggregationInterface;
use Namespace\Modulename\Model\Resource\Modulename\Collection as ModulenameCollection;

/**
 * Class Collection
 * Collection for displaying grid
 */
class Collection extends ModulenameCollection implements SearchResultInterface
{
    /**
     * Resource initialization
     * @return $this
     */
   public function __construct(
        \Magento\Framework\Data\Collection\EntityFactoryInterface $entityFactory,
        \Psr\Log\LoggerInterface $logger,
        \Magento\Framework\Data\Collection\Db\FetchStrategyInterface $fetchStrategy,
        \Magento\Framework\Event\ManagerInterface $eventManager,
        \Magento\Store\Model\StoreManagerInterface $storeManager,
        $mainTable,
        $eventPrefix,
        $eventObject,
        $resourceModel,
        $model = 'Magento\Framework\View\Element\UiComponent\DataProvider\Document',
        $connection = null,
        \Magento\Framework\Model\ResourceModel\Db\AbstractDb $resource = null
    ) {
        parent::__construct(
            $entityFactory,
            $logger,
            $fetchStrategy,
            $eventManager,
            $storeManager,
            $connection,
            $resource
        );
        $this->_eventPrefix = $eventPrefix;
        $this->_eventObject = $eventObject;
        $this->_init($model, $resourceModel);
        $this->setMainTable($mainTable);
    }

    /**
     * @return AggregationInterface
     */
    public function getAggregations()
    {
        return $this->aggregations;
    }

    /**
     * @param AggregationInterface $aggregations
     *
     * @return $this
     */
    public function setAggregations($aggregations)
    {
        $this->aggregations = $aggregations;
    }


    /**
     * Get search criteria.
     *
     * @return \Magento\Framework\Api\SearchCriteriaInterface|null
     */
    public function getSearchCriteria()
    {
        return null;
    }

    /**
     * Set search criteria.
     *
     * @param \Magento\Framework\Api\SearchCriteriaInterface $searchCriteria
     *
     * @return $this
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     */
    public function setSearchCriteria(
        \Magento\Framework\Api\SearchCriteriaInterface $searchCriteria = null
    ) {
        return $this;
    }

    /**
     * Get total count.
     *
     * @return int
     */
    public function getTotalCount()
    {
        return $this->getSize();
    }

    /**
     * Set total count.
     *
     * @param int $totalCount
     *
     * @return $this
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     */
    public function setTotalCount($totalCount)
    {
        return $this;
    }

    /**
     * Set items list.
     *
     * @param \Magento\Framework\Api\ExtensibleDataInterface[] $items
     *
     * @return $this
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     */
    public function setItems(array $items = null)
    {
        return $this;
    }
}

?>

希望能有所帮助。

联接2张桌子

在您的中Vendor\Module\Model\ResourceModel\ModelName\Grid\Collection，添加_initSelect（）函数，如下所示

protected function _initSelect()
{
    parent::_initSelect();

    $this->getSelect()->joinLeft(
        ['secondTable' => $this->getTable('admin_user')], //2nd table name by which you want to join
        'main_table.user_id= secondTable.user_id', // common column which available in both table 
        '*' // '*' define that you want all column of 2nd table. if you want some particular column then you can define as ['column1','column2']
    );
}

加入3张桌子及更多

使用thirdTable和fourthTable可以连接更多表，如下所示：

protected function _initSelect()
{
    parent::_initSelect();

    $this->getSelect()->joinLeft(
        ['secondTable' => $this->getTable('admin_user')],
        'main_table.user_id = secondTable.user_id',
        ['username']
    )->joinLeft(
        ['thirdTable' => $this->getTable('catalog_product_entity')],
        'main_table.product_id = thirdTable.entity_id',
        ['sku']
    );//use fourthTable, fifthTable to join more tables
}

例

文件app/code/SAdmin/Cart/etc/di.xml。

项目名称是UI组件中使用的data_source的名称。

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory">
        <arguments>
            <argument name="collections" xsi:type="array">
                <item name="sadmin_cart_index_index_listing_data_source" xsi:type="string">SAdmin\Cart\Model\ResourceModel\Quote\Grid\Collection</item>
            </argument>
        </arguments>
    </type>
</config>

文件 app/code/SAdmin/Cart/Model/ResourceModel/Quote/Grid/Collection.php

请注意扩展Magento\Framework\View\Element\UiComponent\DataProvider\SearchResult并设置参数$mainTable和$resourceModel。

namespace SAdmin\Cart\Model\ResourceModel\Quote\Grid;


use Magento\Framework\Data\Collection\Db\FetchStrategyInterface as FetchStrategy;
use Magento\Framework\Data\Collection\EntityFactoryInterface as EntityFactory;
use Magento\Framework\Event\ManagerInterface as EventManager;
use Magento\Framework\View\Element\UiComponent\DataProvider\SearchResult;
use Psr\Log\LoggerInterface as Logger;

class Collection extends SearchResult
{
    public function __construct(
        EntityFactory $entityFactory, Logger $logger, FetchStrategy $fetchStrategy, EventManager $eventManager,
        $mainTable = 'quote',
        $resourceModel = 'Magento\Quote\Model\ResourceModel\Quote',
        $identifierName = null, $connectionName = null
    )
    {
        parent::__construct($entityFactory, $logger, $fetchStrategy, $eventManager, $mainTable, $resourceModel, $identifierName, $connectionName);
    }

    public function _initSelect()
    {
        parent::_initSelect();
        return $this->getSelect()->joinLeft(
            ['secondTable' => $this->getTable('customer_group')], //2nd table name by which you want to join
            'main_table.customer_group_id= secondTable.customer_group_id', // common column which available in both table
            ['customer_group_code']// '*' define that you want all column of 2nd table. if you want some particular column then you can define as ['column1','column2']
        );
    }
}