Table of Contents

• Table of Contents
• Installation
• Usage
• Configuration
• Documentation
• License

Installation

npm install @knaadh/nestjs-drizzle-postgres drizzle-orm postgres

Usage

Import the DrizzlePostgresModule module and pass an options object to initialize it. You can pass options object using the usual methods for custom providers as shown below:

import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import * as schema from '../db/schema';
import { DrizzlePostgresModule } from '@knaadh/nestjs-drizzle-postgres';

@Module({
  imports: [
    // Method #1: Pass options object
    DrizzlePostgresModule.register({
      tag: 'DB_DEV',
      postgres: {
        url: 'postgres://postgres:@127.0.0.1:5432/drizzleDB',
      },
      config: { schema: { ...schema } },
    }),

    // Method #2: useFactory()
    DrizzlePostgresModule.registerAsync({
      tag: 'DB_PROD',
      useFactory() {
        return {
          postgres: {
            url: 'postgres://postgres:@127.0.0.1:5432/drizzleDB',
          },
          config: { schema: { ...schema } },
        };
      },
    }),

    // Method #3: useClass()
     DrizzlePostgresModule.registerAsync({
      tag: 'DB_STAGING',
      useClass: DBConfigService,
    }),
  ],

  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {}

export class DBConfigService {
  create = () => {
    return {
      postgres: {
        url: 'postgres://postgres:@127.0.0.1:5432/drizzleDB',
      },
      config: { schema: { ...schema } },
    };
  };
}

You can inject the Drizzle instances using their respective tag specified in the configurations

import { Inject, Injectable } from '@nestjs/common';
import { PostgresJsDatabase } from 'drizzle-orm/postgres-js';
import * as schema from '../db/schema';
@Injectable()
export class AppService {
  constructor(
    @Inject('DB_DEV') private drizzleDev: PostgresJsDatabase<typeof schema>,
    @Inject('DB_PROD') private drizzleProd: PostgresJsDatabase<typeof schema>
    ) {}
  async getData() {
    const books = await this.drizzleDev.query.books.findMany();
    const authors = await this.drizzleProd.query.authors.findMany();
    return {
      books: books,
      authors: authors,
    };
  }
}

Configuration

A DrizzlePostgresModule option object has the following interface:

export interface DrizzlePostgresConfig {
  postgres: {
    url: string;
    config?: Options<Record<string, PostgresType<any>>> | undefined;
  };
  config?: DrizzleConfig<any> | undefined;
}

• postgres.url: postgres url connection string
• (optional) postgres.config: Postgres.js driver options
• (optional) config: DrizzleORM configuration

Documentation

• NX
• DrizzleORM
• PostgresJS

License

This package is MIT licensed.