"Unique constraint violation found" Error When Assign Product into Category

Question

After Assign Product Into Category Getting Error Unique constraint violation found

In exception.log file :-

[2019-05-31 17:53:29] main.CRITICAL: Unique constraint violation found {"exception":"[object] (Magento\Framework\Exception\AlreadyExistsException(code: 0): Unique constraint violation found at /var/www/html/m2shineretrofits/vendor/magento/framework/EntityManager/Operation/Update.php:121, Magento\Framework\DB\Adapter\DuplicateException(code: 1062): SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'root-category/sub-category/product-url' for key 'URL_REWRITE_REQUEST_PATH_STORE_ID', query was: INSERT INTO url_rewrite (redirect_type,is_autogenerated,metadata,description,entity_type,entity_id,request_path,target_path,store_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?), (?, ?, ?, ?, ?, ?, ?, ?, ?),

Also Try This Solution But Not Working :-

Add categories automatically - Unique constraint violation found

Magento 2 Unique Constraint Violation Found On Product Save

Magento 2 : Unique constraint violation found when adding product, categories or mega menu items

Answer 1

Using Preference :-

Vendor/Module/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\UrlRewrite\Model\Storage\DbStorage" type="Scriptlodge\UrlRewrite\Model\Storage\DbStorage" />
</config>

Vendor/Module/Model/Storage/DbStorage.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Vendor\Module\Model\Storage;

use Magento\Framework\DB\Select;
use Magento\UrlRewrite\Service\V1\Data\UrlRewrite;
use Magento\UrlRewrite\Service\V1\Data\UrlRewrite as UrlRewriteData;

class DbStorage extends \Magento\UrlRewrite\Model\Storage\DbStorage
{
    /**
     * @param UrlRewrite[] $urls
     *
     * @return void
     */
    private function deleteOldUrls(array $urls)
    {
        $oldUrlsSelect = $this->connection->select();
        $oldUrlsSelect->from(
            $this->resource->getTableName(self::TABLE_NAME)
        );
        /** @var UrlRewrite $url */
        foreach ($urls as $url) {
            $oldUrlsSelect->orWhere(
                $this->connection->quoteIdentifier(
                    UrlRewrite::ENTITY_TYPE
                ) . ' = ?',
                $url->getEntityType()
            );
            $oldUrlsSelect->where(
                $this->connection->quoteIdentifier(
                    UrlRewrite::ENTITY_ID
                ) . ' = ?',
                $url->getEntityId()
            );
            $oldUrlsSelect->where(
                $this->connection->quoteIdentifier(
                    UrlRewrite::STORE_ID
                ) . ' = ?',
                $url->getStoreId()
            );
        }

        // prevent query locking in a case when nothing to delete
        $checkOldUrlsSelect = clone $oldUrlsSelect;
        $checkOldUrlsSelect->reset(Select::COLUMNS);
        $checkOldUrlsSelect->columns('count(*)');
        $hasOldUrls = (bool)$this->connection->fetchOne($checkOldUrlsSelect);

        if ($hasOldUrls) {
            $this->connection->query(
                $oldUrlsSelect->deleteFromSelect(
                    $this->resource->getTableName(self::TABLE_NAME)
                )
            );
        }
    }

    public function doFindAllByDataUrl(array $urls)
    {
        $oldUrlsSelect = $this->connection->select();
        $oldUrlsSelect->from(
            $this->resource->getTableName(self::TABLE_NAME)
        );

        /** @var UrlRewrite $url */
        foreach ($urls as $url) {
            $oldUrlsSelect->orWhere(
                $this->connection->quoteIdentifier(
                    UrlRewrite::ENTITY_TYPE
                ) . ' = ?',
                $url->getEntityType()
            );

            $oldUrlsSelect->where(
                $this->connection->quoteIdentifier(
                    UrlRewrite::ENTITY_ID
                ) . ' = ?',
                $url->getEntityId()
            );
            $oldUrlsSelect->where(
                $this->connection->quoteIdentifier(
                    UrlRewrite::STORE_ID
                ) . ' = ?',
                $url->getStoreId()
            );
        }
        $__hasOldUrls = $this->connection->fetchAll($oldUrlsSelect);
        $data=[];
        if(count($__hasOldUrls)>0) {
            foreach ($__hasOldUrls as $hasOldUrl) {
                $data[] = $hasOldUrl['request_path'];
            }
        }
        return $data;

        //return $hasOldUrls = $this->connection->fetchAll($oldUrlsSelect);

    }


    /**
     * @inheritDoc
     */
    protected function doReplace(array $urls)
    {
        $this->deleteOldUrls($urls);
        //$foundurls= $this->doFindAllByDataUrl($urls);
        $data = [];
        $urlConflicted = [];
        foreach ($urls as $url) {
            $urlFound = $this->doFindOneByData(
                [
                    UrlRewriteData::REQUEST_PATH => $url->getRequestPath(),
                    UrlRewriteData::STORE_ID => $url->getStoreId(),
                ]
            );
            if (isset($urlFound[UrlRewriteData::URL_REWRITE_ID])) {
                $urlConflicted[$urlFound[UrlRewriteData::URL_REWRITE_ID]] = $url->toArray();
                continue;
            } else {
                $data[] = $url->toArray();
            }

            /*if(!in_array($url->getRequestPath(),$foundurls)){
                $data[] = $url->toArray();
            }else{
                continue;
            }*/
        }

        try {
            $this->insertMultiple($data);
        } catch (\Magento\Framework\Exception\AlreadyExistsException $e) {
            /** @var \Magento\UrlRewrite\Service\V1\Data\UrlRewrite[] $urlConflicted */
            $urlConflicted = [];
            foreach ($urls as $url) {
                $urlFound = $this->doFindOneByData(
                    [
                        UrlRewriteData::REQUEST_PATH => $url->getRequestPath(),
                        UrlRewriteData::STORE_ID => $url->getStoreId(),
                    ]
                );
                if (isset($urlFound[UrlRewriteData::URL_REWRITE_ID])) {
                    $urlConflicted[$urlFound[UrlRewriteData::URL_REWRITE_ID]] = $url->toArray();
                }
            }
            if ($urlConflicted) {
                throw new \Magento\UrlRewrite\Model\Exception\UrlAlreadyExistsException(
                    __('URL key for specified store already exists.'),
                    $e,
                    $e->getCode(),
                    $urlConflicted
                );
            } else {
                throw $e->getPrevious() ?: $e;
            }
        }

        return $urls;
    }

}