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named-placeholders

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named-placeholders

sql named placeholders to unnamed compiler

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What is named-placeholders?

The named-placeholders npm package is used to convert SQL query strings with named placeholders into a format that can be used with parameterized queries. This is particularly useful for preventing SQL injection attacks and making SQL queries more readable and maintainable.

What are named-placeholders's main functionalities?

Convert named placeholders to positional placeholders

This feature allows you to convert a SQL query with named placeholders into a query with positional placeholders, which can then be executed using a database client that supports parameterized queries.

const named = require('named-placeholders')();
const query = 'SELECT * FROM users WHERE name = :name AND age = :age';
const params = { name: 'John', age: 30 };
const [sql, values] = named(query, params);
console.log(sql); // 'SELECT * FROM users WHERE name = ? AND age = ?'
console.log(values); // ['John', 30]

Support for repeated placeholders

This feature allows you to use the same named placeholder multiple times in a query. The named-placeholders package will correctly replace all instances with the appropriate positional placeholders.

const named = require('named-placeholders')();
const query = 'SELECT * FROM users WHERE name = :name OR nickname = :name';
const params = { name: 'John' };
const [sql, values] = named(query, params);
console.log(sql); // 'SELECT * FROM users WHERE name = ? OR nickname = ?'
console.log(values); // ['John', 'John']

Support for array parameters

This feature allows you to use arrays as parameters in your SQL queries. The named-placeholders package will expand the array into the appropriate number of positional placeholders.

const named = require('named-placeholders')();
const query = 'SELECT * FROM users WHERE id IN (:ids)';
const params = { ids: [1, 2, 3] };
const [sql, values] = named(query, params);
console.log(sql); // 'SELECT * FROM users WHERE id IN (?, ?, ?)'
console.log(values); // [1, 2, 3]

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Package last updated on 12 Jan 2023

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