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glhera-db-utils

v1.0.0-next.3

Published

Biblioteca simples para auxiliar o uso de `Raw SQL`, provendo tipagem para métodos simples de `insert` e `update`, mas essa biblioteca é muito simples, não foi desenvolvida para ser um completo `query builder`, só para `insert` e `update` de uma linha

Downloads

10

Readme

glhera-db-utils

Biblioteca simples para auxiliar o uso de Raw SQL, provendo tipagem para métodos simples de insert e update, mas essa biblioteca é muito simples, não foi desenvolvida para ser um completo query builder, só para insert e update de uma linha

Possui wrappers para node-postgres (pg), @electric-sql/pglite (pglite) e better-sqlite3

Exemplo

import { PGDBInstance } from 'glhera-db-utils/pg';
import { pg } from 'pg';

//
// A tipagem do banco
type DBTypes = {
  users: {
    id: number;
    name: string;
  };
};

//
// Cria o driver de acesso do postgres
const client = new pg.Client({ connectionString });
await client.connect();

//
// Cria a instancia para acesso
const pgDB = new PGDBInstance<DBTypes>(client);

//
// Acessando o client no pgDB
console.log(pgDB.driver);

Banco de dados suportados no momento

import { PGDBInstance } from 'glhera-db-utils/pg';
import { PGLiteDBInstance } from 'glhera-db-utils/pglite';
import { BetterSqlite3DBInstance } from 'glhera-db-utils/better-sqlite3';

Integrando com alguma biblioteca como o Zod

import { PGDBInstance } from 'glhera-db-utils/pg';
import { pg } from 'pg';
import { z } from 'zod';

//
// A tipagem do banco
const dbSchemas = {
  users: z.object({
    id: z.number(),
    name: z.string(),
  }),
};

//
// Cria o driver de acesso do postgres
const client = new pg.Client({ connectionString });
await client.connect();

//
// Tipo utilitário para inferir a tipagem de um objeto Zod
type InferTypes<T extends Record<string, z.ZodType<any, any, any>>> = {
  [K in keyof T]: z.infer<T[K]>;
};

//
// Cria a instancia para acesso
const pgDB = new PGDBInstance<InferTypes<typeof dbSchemas>>(client);

E com o exemplo abaixo, podemos validar com o Zod (pode ser outro como o yup) o nosso campo antes de salvá-lo, útil para campos json ou salvar no SQLite

const dbSchemasInsert = {
  users: z.object({
    id: z.number(),
    name: z.string(),
  }),
};

const dbSchemasUpdate = {
  users: dbSchemasInsert.users.partial(),
};

const pgDB = new PGDBInstance<InferTypes<typeof dbSchemasInsert>>(
  client,
  (table, values) => (dbSchemasInsert as any)[table].parse(values), // Insert, unfortunately typing here does not work well
  (table, values) => (dbSchemasUpdate as any)[table].parse(values), // Update, unfortunately typing here does not work well
);

Notas

É necessário criar um dbSchemasUpdate que seja partial para essa operação

A tipagem para o Zod (ou outra lib) para insert é que o id se é autoincrements precisa ser .nullish() para que o TypeScript não fique reclamando em cada insert por não inserir o id

ROADMAP

  • wrappers para
    • mysql2

Tests

Para poder testar essa aplicação, é necessário definir as variáveis de ambiente para o postgres

PG_USER=
PG_PASSWORD=
PG_HOST=
PG_DATABASE=