node-postgres create database

Question

I am using node-postgres, and at the beginning of my application I want to check whether the database exists or not. So my workflow idea is as following:

1. Check

Answer 1

This is a bit old but I just want to share how I handled this kind of setup.

You need to call the third param from the callback which is the done from pg.connect(conn, (err, client, done) => {}). This will release the connection and bring back to pool.

 async.series([
   done => {
     pg.connect(connPrimary, (err, client, releaseConn) => {
      if (err) return done(err)

      client.query(`CREATE DATABASE ${conf.database}`, (err) => {
        if (err && !~err.message.indexOf('already exists')) {
          return done(err)
        }

        client.end()
        releaseConn()
        done()
      })
    })
  },
  done => {
    let connSecondary = `postgres://${conf.user}:${conf.password}@${conf.host}:${conf.port}/${conf.database}`

    pg.connect(connSecondary, (err, client, releaseConn) => {
      if (err) return done(err)

      let createTableQuery = `CREATE TABLE IF NOT EXISTS test_table(_id bigint primary key, co2_field varchar(40) NOT NULL, temp_field int NOT NULL, quality_field decimal NOT NULL, reading_time_field timestamp NULL)`

      client.query(createTableQuery, err => {
        if (err) return done(err)

        releaseConn()
        done()
      })
    })    
  }
], err => {
  should.ifError(err)
  doneInit()
})