{"id":1932,"date":"2021-10-20T12:06:12","date_gmt":"2021-10-20T12:06:12","guid":{"rendered":"https:\/\/meetanshi.com\/blog\/solved-integrity-constraint-violation-error-referring-to-quote_item-table-while-adding-product-to-cart-in-magento-2\/"},"modified":"2025-07-16T17:07:05","modified_gmt":"2025-07-16T11:37:05","slug":"solved-integrity-constraint-violation-error-referring-to-quote_item-table-while-adding-product-to-cart-in-magento-2","status":"publish","type":"post","link":"https:\/\/meetanshi.com\/blog\/solved-integrity-constraint-violation-error-referring-to-quote_item-table-while-adding-product-to-cart-in-magento-2\/","title":{"rendered":"Solved: Integrity Constraint Violation Error Referring to quote_item Table While Adding Product to Cart in Magento 2"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Magento 2\u00a0CMS allows customizing the default features based on business requirements.\u00a0<a href=\"https:\/\/meetanshi.com\/blog\/magento-2-events\/\" target=\"_blank\" rel=\"noreferrer noopener\">Magento 2 events<\/a>\u00a0are implemented to run custom code in response to any particular Magento 2 event or custom event.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this post, I am posting the solution for the error that occurs while using the event \u201ccheckout_cart_product_add_after\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can use this event when you want to automatically add a product to the cart when the customer adds another specific product to the cart.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, a processing fee or a free item can be automatically added as a product when a customer chooses to purchase an item.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, when you implement the same using the \u201ccheckout_cart_product_add_after\u201d event, you may face an error that states,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fail<\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The error occurs because the automated item is saved.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">All you need to do is remove or comment the&nbsp;<strong>$item-&gt;save();<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once you remove \u201c$item-&gt;save();\u201d, you\u2019ll get the solution of the&nbsp;<strong><em>integrity constraint violation error<\/em>&nbsp;referring to quote_item table while adding product to cart in Magento 2<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That\u2019s it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also, I\u2019d be grateful if you could share the solution with the Magento Community via social media.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thank you.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Magento 2\u00a0CMS allows customizing the default features based on business requirements.\u00a0Magento 2 events\u00a0are implemented to run custom code in response to any particular Magento 2&#8230;<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[34],"tags":[],"class_list":["post-1932","post","type-post","status-publish","format-standard","hentry","category-magento"],"acf":[],"_links":{"self":[{"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/posts\/1932","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/comments?post=1932"}],"version-history":[{"count":3,"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/posts\/1932\/revisions"}],"predecessor-version":[{"id":18014,"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/posts\/1932\/revisions\/18014"}],"wp:attachment":[{"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/media?parent=1932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/categories?post=1932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/meetanshi.com\/blog\/wp-json\/wp\/v2\/tags?post=1932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}