hapi-node-postgres

Wrap requests with a Postgres connection.

We use the pg (node-postgres) module and take advantage of its connection pooling feature.

Note: Your project should have its own pg dependency installed. We depend on pg via peerDependencies. If you elect to use native bindings you'll also need to install the pg-native package.

Install

$ npm install hapi-node-postgres

Usage

In request handlers

In your request handlers you'll have access to request.pg.client which you can use to make DB requests. We even clean up the connection for you after the request is complete.

During your request handler you can set request.pg.kill to true, and we'll remove the connection from the pool instead of simply returning it to be reused. This is usually done when an error is detected during a query.

server.route({
    method: 'GET',
    path: '/',
    handler: function (req, reply) {
 
        const cmd = 'SELECT * FROM stats;';
 
        req.pg.client.query(cmd, (err, result) => {
 
            if (err) {
                request.pg.kill = true;
 
                return reply(err);
            }
 
            reply('Number of rows: ', result.rows.length);
        });
    }
});

Outside of request handlers

Outside of request handlers you can get access to the Postgres connect method. We expose it from the plugin already bound to the connection string.

After plugin registration is complete you'll have access through the server.plugins api.

const hpg = server.plugins['hapi-node-postgres'];
 
hpg.connect((err, client, done) => {
 
      if (err) {
          // handle error case
      }
 
      // make queries with client
 
      // call done to return client to the connection pool
  });

Plugin registration

Register the plugin manually.

const plugin = {
    register: require('hapi-node-postgres'),
    options: {
        connectionString: 'postgres://username:password@localhost/database',
        native: true
    }
};
 
server.register(plugin, (err) => {
 
    if (err) {
        console.error('Failed loading "hapi-node-postgres" plugin');
    }
 });

Or include it in your composer manifest.

"plugins": {
    "hapi-node-postgres": {
        "connectionString": "postgres://username:password@localhost/database",
        "native": true
    }
}

The options passed to the plugin is an object where:

• connectionString - a string representing the connection details for Postgres.
• attach - a string representing the extension point event where the request is decorated with the pg attribute. Defaults to onPreHandler.
• detach - a string representing the server event where the connection is cleaned up. Defaults to tail.
• native - a boolean indicating if the native bindings should be used. Defaults to false. Native bindings offer 20-30% increase in parsing speed.

See the hapijs docs to learn more about request lifecycle events.

License

MIT

Don't forget

What you create with hapi-node-postgres is more important than hapi-node-postgres.