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libpostgresbridge

v1.0.2

Published

Librería de postgreSql para gestionar querys

Downloads

303

Readme

libpostgresbridge

Librería ligera para trabajar con PostgreSQL en Node.js con soporte para:

  • Queries simples
  • Queries con parámetros
  • Bloques de queries
  • Transacciones
  • Callbacks
  • Async / Await
  • Múltiples conexiones

Instalación

npm install libpostgresbridge

Importar la librería


const libpostgresbridge = require("libpostgresbridge")

Conexión a la base de datos

Conexión usando configuración externa

const proyecto = new libpostgresbridge(config.bd.proyecto);

Conexión manual

const salud = new libpostgresbridge({
  user: 'postgres',
  password: 'admin',
  host: '127.0.0.1',
  port: 5432,
  database: "Salud",
  ssl: false,
});

Soporte de Callbacks

proyecto.Query("DROP TABLE IF EXISTS prueba;", (res) => {
  console.log(res);
  proyecto.Query("SELECT * INTO TEMP TABLE prueba FROM usuarios", (res) => {
    console.log(res);
    proyecto.Query("SELECT * FROM prueba", (res) => {
      console.log(res);
    });
  });
});

Bloques de queries con parámetros

proyecto.Query([
  { 
    text: "SELECT * FROM usuarios WHERE usuarios_id = $1",
    values: [1]
  }
], (res) => {
  console.log(res[0].data);
});

Bloques de queries clásicos (async)

const resultado = await proyecto.Query([
  `CREATE TEMP TABLE prueba AS SELECT * FROM usuarios`,
  `SELECT * FROM prueba`
])
console.log(resultado)

Query con parámetros (único)

proyecto.Query(
  {
    text: "SELECT * FROM usuarios WHERE usuarios_id = $1",
    values: [1]
  },
  (res) => {
    console.log(res);
  }
);

Query clásico

proyecto.Query("SELECT * FROM usuarios WHERE usuarios_id = 1", (res) => {
  console.log(res);
});

Queries individuales asincrónicos

await proyecto.Query("DROP TABLE IF EXISTS prueba2")
await proyecto.Query("SELECT * INTO TEMP TABLE prueba2 FROM usuarios")
const leetabla = await proyecto.Query("SELECT * FROM prueba2")
console.log(leetabla.data)

Transacciones (async)

await proyecto.Transaction(async (client) => {
  const a = await client.query(
    "INSERT INTO usuarios(nombre) VALUES('juan1')"
  )
  console.log(a)
  const b = await client.query(
    "INSERT INTO usuarios(nombre) VALUES('pedro2')"
  )
  console.log(b)
})

Bloques de queries con parámetros (async)

const resultado2 = await proyecto.Query([
  {
    text: "INSERT INTO usuarios (nombre) VALUES ($1) RETURNING usuarios_id",
    values: ['john prueba2']
  },
  {
    text: "SELECT * FROM usuarios"
  },
  {
    text: "SELECT * FROM usuarios WHERE usuarios_id = $1",
    values: [2]
  },
  {
    text: "UPDATE usuarios SET nombre = $2 WHERE usuarios_id = $1",
    values: [2, 'John']
  },
  {
    text: "DELETE FROM usuarios WHERE usuarios_id = $1",
    values: [200]
  }
])
console.log(resultado2)

Múltiples conexiones

salud.Query(["SELECT 1 AS x"], (res) => {
  console.log(res);
});

Licencia

MIT