正则表达式获取括号之间和 Javascript 中的字符串文字内部的字符串

Question

let s =  "Cannot add or update a child row: a foreign key constraint fails (`testdb`.`products`, CONSTRAINT `products_ibfk_3` FOREIGN KEY (`category_id`) REFERENCES `product_categories` (`id`))"

here I need to extract the FOREIGN key inside the literal with parenthesis ex. extracted = "category_id" . I don't know how to do with regexp .

Anyone, can you help me?

Thank in advance for your great community support.

Answer 1

 let s = "Cannot add or update a child row: a foreign key constraint fails (`testdb`.`products`, CONSTRAINT `products_ibfk_3` FOREIGN KEY (`category_id`) REFERENCES `product_categories` (`id`))"; let match = /FOREIGN KEY \(`([\w]*)`\)/.exec(s); let extracted = match[1]; console.log(extracted);

Edit:

The pattern( /FOREIGN KEY (([\w]*))/ ) does extract "FOREIGN KEY (category_id)" and "category_id" from string. Please refer to this url .