sqliteHow can I use Knex.js with SQLite?

Knex.js is a SQL query builder for Node.js, which can be used to access SQLite databases. It provides an easy way to build SQL queries using JavaScript, and can be used to connect to a SQLite database.

To use Knex.js with SQLite, first install the Knex.js library:

npm install knex

Then, create a knexfile.js file in the project root directory, and add the following code:

// knexfile.js

module.exports = {
  development: {
    client: 'sqlite3',
    connection: {
      filename: './dev.sqlite3'
    }
  }
};

This will configure Knex.js to use the dev.sqlite3 file as the SQLite database.

Next, create a db.js file in the project root directory, and add the following code:

// db.js

const knex = require('knex');
const knexfile = require('./knexfile');

const env = process.env.NODE_ENV || 'development';
const configOptions = knexfile[env];

const conn = knex(configOptions);

module.exports = conn;

This will create a connection to the SQLite database using the knexfile.js configuration.

Finally, to use Knex.js to query the database, import the db.js file and use the .raw() method:

// app.js

const conn = require('./db');

conn.raw('SELECT * FROM users')
  .then(res => {
    console.log(res);
  });

This will output the results of the query:

[
  {
    id: 1,
    name: 'John',
    email: '[email protected]'
  },
  {
    id: 2,
    name: 'Jane',
    email: '[email protected]'
  }
]

In summary, to use Knex.js with SQLite:

1. Install the Knex.js library
2. Create a knexfile.js file to configure the connection
3. Create a db.js file to create the connection
4. Import the db.js file and use the .raw() method to query the database

Helpful links

• Knex.js Documentation
• SQLite Documentation

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