# Adapter between `cake` and `gleam_pgo`

[![Package <a href="https://github.com/inoas/gleam-cake-pgo/releases"><img src="https://img.shields.io/github/release/inoas/gleam-cake-gleam_pgo" alt="GitHub release"></a> Version](https://img.shields.io/hexpm/v/cake_gleam_pgo)](https://hex.pm/packages/cake_gleam_pgo)
[![Erlang-compatible](https://img.shields.io/badge/target-erlang-b83998)](https://www.erlang.org/)
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🎂[Cake](http://hex.pm/packages/cake) 🐘PostgreSQL adapter which which passes `PreparedStatement`s to the [gleam_pgo](http://hex.pm/packages/gleam_pgo) library for execution written in [Gleam](https://gleam.run/).

## Installation

```sh
gleam add cake_gleam_pgo@1
```

## Example

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

```gleam
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
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(dynamic.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(dynamic.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(dynamic.dynamic, db_connection)
  |> io.debug
}
```