Database

A BEAM-native database that leverages on the power of DETS

gleam add database

import database

type Music {
  Music(name: String, release_year: String)
}

pub fn main() -> Nil {
  let sample = Music("Macarena", 1993)

  // 0 indicates that the table primary_key is the 0th value (name)
  let assert Ok(table) = database.create_table(sample, 0)

  // All interactions with the table happen within a transaction
  let assert Ok(Nil) = database.transaction(table, fn(ref) {
    database.insert(ref, Music("The Rains of Castemere", 2019))
  })

  // You can do multiple operations within the same transaction, as long as they don't interact with each other
  let _ = database.transaction(table, fn(ref) {
    let assert Ok(Nil) = database.insert(ref, Music("Templars", 2025))
    let assert Ok(Nil) = database.insert(ref, Music("Kids", 2009))
    let assert Ok(Nil) = database.delete(ref, "The Rains of Castemere")
  })

  let _ = database.transaction(table, fn(ref) {
    let assert Error(Nil) = database.find(ref, "The Rains of Castemere")
    let assert Ok(Music("Templars", 2025)) = database.find(ref, "Templars")
  })
}

Further documentation can be found at https://hexdocs.pm/database.

Development

gleam run   # Run the project
gleam test  # Run the tests