Adapter between cake and pog

🎂Cake 🐘PostgreSQL adapter which passes PreparedStatements to the pog library for execution written in Gleam.

Installation

gleam add cake_pog@1

Example

Notice: Official cake adapters re-use the cake namespace, thus you can import them like such: import cake/adapter/postgres.

import cake/adapter/postgres
import cake/delete as d
import cake/insert as i
import cake/select as s
import cake/where as w
import gleam/dynamic/decode
import gleam/option.{None}

const postgres_database_name = "my_postgres_database_name"

pub fn main() {
  postgres.with_connection(
    host: "localhost",
    port: 5432,
    username: "postgres",
    password: None,
    database: postgres_database_name,
    fn(db_connection) {
      db_connection |> create_table_if_not_exists_birds
      db_connection |> insert_into_table_birds
      db_connection |> select_from_table_birds
      db_connection |> delete_from_table_birds
    }
  )
}

fn create_table_if_not_exists_birds(db_connection) {
  "CREATE TABLE IF NOT EXISTS birds (
    species TEXT,
    average_weight FLOAT(8),
    is_extinct BOOLEAN
  );"
  |> postgres.execute_raw_sql(db_connection)
  |> io.debug
}

fn insert_into_table_birds(db_connection) {
  [
    [i.string("Dodo"), i.float(14.05), i.bool(True)] |> i.row,
    [i.string("Great auk"), i.float(5.0), i.bool(True)] |> i.row,
  ]
  |> i.from_values(
      table_name: "birds",
      columns: [
        "species", "average_weight", "is_extinct",
      ]
  )
  |> i.to_query
  |> postgres.run_write_query(decode.dynamic, db_connection)
  |> io.debug
}

fn select_from_table_birds(db_connection) {
  s.new()
  |> s.from_table("table")
  |> s.selects([s.col("species")])
  |> s.to_query
  |> postgres.run_read_query(decode.dynamic, db_connection)
  |> io.debug
}

fn delete_from_table_birds(db_connection) {
  d.new()
  |> d.table("birds")
  |> d.where(w.col("species") |> w.eq(w.string("Dodo")))
  |> d.to_query
  |> postgres.run_write_query(decode.dynamic, db_connection)
  |> io.debug
}

History

This used to be https://github.com/inoas/gleam-cake-gleam_pgo