npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

mysql-query-placeholders

v0.2.2

Published

Build prepared statements from named parameters.

Downloads

397

Readme

Code Style: Google Node.js Package

mysql-query-placeholders

Build prepared statements from named parameters.

Consider the following object:

const user = {
  id: 123,
  status: {
    active: true,
  },
  services: {
    home: {
      route: '/',
    },
    dashboard: {
      route: '/dashboard',
    },
  },
  name: 'John',
  email: '[email protected]',
};

Then you can easily create a prepared statement for MySQL using the data from the object above.

const mqp = require('mysql-query-placeholders');
const mysql = require('mysql2').createConnection...

const query = 'SELECT * FROM users WHERE id = :id AND name = :name;';
const queryData = mqp.queryBuilder(query, user);
console.log(queryData);
// {
//   sql: 'SELECT * FROM users WHERE id = ? AND name = ?;',
//   values: [123, 'John'],
// }

// use named parameters
mysql.query(queryData, (err, result) => {...});

ES6 Module

import {queryBuilder} from 'mysql-query-placeholders';
import {createConnection} from 'mysql2/promise';

const mysql = createConnection(...);

const query = 'SELECT * FROM users WHERE id = :id AND name = :name;';
const queryData = queryBuilder(query, user);
console.log(queryData);
// {
//   sql: 'SELECT * FROM users WHERE id = ? AND name = ?;',
//   values: [123, 'John'],
// }

// use named parameters
await mysql.query(queryData);

Handling missing parameters

MySQL throws an error if a parameter is not given. Passing a configuration object with useNullForMissing set to true (which is true by default), a null value is used instead.

const query = 'SELECT * FROM users WHERE id = :id AND last_name = :last_name;';
const queryData = mqp.queryBuilder(query, user, {useNullForMissing: true});
console.log(queryData);
// {
//   sql: 'SELECT * FROM users WHERE id = ? AND last_name = ?;',
//   values: [123, null],
// }

If you do not want to use null by default, you can throw an error instead, setting the useNullForMissing configuration option to false.

try {
  const query = 'SELECT * FROM users WHERE id = :id AND last_name = :last_name;';
  const queryData = mqp.queryBuilder(query, user, {useNullForMissing: false});
} catch (e) {
  errorMessage = e.message;
  console.log(errorMessage);
  // Missing value for statement.
  //   last_name not provided for statement:
  //   ...
}

Support for multiple level object property values

mqp is capable to get a object property value from a key.name.property.value syntax. This is useful when you do not want to reassign the property value to another variable or you want to use the original object instead of creating a new one.

const query = 'SELECT * FROM services WHERE route IN (:services.dashboard.route, :services.home.route);';
const queryData = mqp.queryBuilder(query, user);
console.log(queryData);
// {
//   sql: 'SELECT * FROM services WHERE route IN (?, ?);',
//   values: [ '/dashboard', '/' ]
// }

Missing property:

const query = 'INSERT INTO services (name, route) VALUES (\'cpanel\', :services.cpanel.route);';
const queryData = mqp.queryBuilder(query, user);
console.log(queryData);
// {
//   sql: "INSERT INTO services (name, route) VALUES ('cpanel', ?);",
//   values: [ null ]
// }

Or using {useNullForMissing: false} config:

try {
  const query = 'SELECT * FROM services WHERE route = :services.cpanel.route;';
  const queryData = mqp.queryBuilder(query, user, {useNullForMissing: false});
} catch (e) {
  errorMessage = e.message;
  console.log(errorMessage);
  //  Missing value for statement.
  //    services.cpanel.route not provided for statement:
  //    ...
}