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POTrouble updating rows in node-mysql
 

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  1. POTrouble updating rows in node-mysql
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    <p>I've just started with node-mysql, and have created a database 'users'. I can select and create just fine, following instructions from the <a href="https://github.com/felixge/node-mysql" rel="nofollow noreferrer">repository</a>. The database currently has values</p> <pre><code>[ { id: 1, user_login: 'mwilson' }, { id: 2, user_login: 'newbie' } ] </code></pre> <p>and fields [id, user_login, user_nicename]. </p> <p>However when I run the update function to update the second user, my results show me that I have 1 row matched but 0 rows changed, and SELECT confirms that there was no update.</p> <p>My code:</p> <pre><code>connection.query('UPDATE users SET user_nicename = ? WHERE user_login = ?', ['New User','newbie'], function(err, results) { if(err) { console.log("Failed on query",err); } else { console.log(results); </code></pre> <p>Results:</p> <pre><code>{ fieldCount: 0, affectedRows: 1, insertId: 0, serverStatus: 34, warningCount: 0, message: '(Rows matched: 1 Changed: 0 Warnings: 0', protocol41: true, changedRows: 0 } </code></pre> <p>And after connection.query('SELECT id, user_login FROM users'):</p> <pre><code>[ { id: 1, user_login: 'mwilson' }, { id: 2, user_login: 'newbie' } ] </code></pre> <p>The closest other question I could find to mine is <a href="https://stackoverflow.com/questions/14992879/node-js-mysql-query-syntax-issues-update-where">Node.js mysql query syntax issues UPDATE WHERE</a>. My code follows the format given by the first answer; other attempts gave query errors. I also saw a post from someone that got this result when trying to increment a NULL field.</p> <p>If I use WHERE id = 2 I get the same error. My configuration parameters use an account I've given permissions to (GRANT ALL PRIVILEGES ON testdb.* TO 'dev'@'%' IDENTIFIED BY 'dev';)</p> <p>Any thoughts on how I can update my update?</p> <p>EDIT: To form the database I ran:</p> <pre><code>CREATE TABLE users( id int auto_increment primary key, user_login varchar(25), user_nicename varchar(75) ); </code></pre> <p>So by default the user fields aside from id are NULL.</p>
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    1. USarilaan
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    1. COYou're updating `user_nicename` which you're not showing in your select or sample data. What value does that field have before/after the update?
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      1. POTrouble updating rows in node-mysql
      1. USJoachim Isaksson
    2. COJust NULL. I only ran `'INSERT INTO users SET ?', {user_login: 'newbie'}` to create the second row.
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      1. POTrouble updating rows in node-mysql
      1. USarilaan
    3. COYes, but you're not showing `user_nicename` after the update, your `SELECT` only selects `id` and `user_login`.
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      1. POTrouble updating rows in node-mysql
      1. USJoachim Isaksson
 

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