README.md

Nest Redis Module

Redis(ioredis) module for Nest framework (node.js).
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Table of Contents

1. About The Project
   • Features
   • Test coverage
2. Getting Started
   • Prerequisites
   • Installation
3. Usage
4. FAQs
5. Roadmap
6. Contributing
7. License
8. Acknowledgments

About The Project

Features

• Both redis & cluster are supported: You can also specify multiple instances.
• Health: Checks health of redis & cluster server.
• Rigorously tested: With 100+ tests and 100% code coverage.
• Decorators: Injects redis & cluster clients via @InjectRedis(), @InjectCluster().
• Services: Retrieves redis & cluster clients via RedisService, ClusterService.
• Testing: Generates an injection token via getRedisToken, getClusterToken.

Test coverage

Statements	Branches	Functions	Lines

Getting Started

Prerequisites

This lib requires Node.js >=16.0.0, NestJS ^10.0.0, ioredis ^5.0.0.

• If you depend on ioredis 4, please use version 7 of the lib.
• If you depend on ioredis 5, NestJS 7 or 8, please use version 8 of the lib.

Installation

# with npm
npm install @mvmdev/nestjs-redis ioredis
# with yarn
yarn add @mvmdev/nestjs-redis ioredis
# with pnpm
pnpm add @mvmdev/nestjs-redis ioredis

Usage

• Redis
  • Usage
  • Configuration
  • Testing
  • Non-Global
  • Auto-reconnect
  • Unix domain socket
• Cluster
  • Usage
  • Configuration
  • Testing
  • Non-Global
  • Auto-reconnect
• Health Checks
• Examples
  • Redis Sentinel

Legacy

• version 7, click here
• version 8, click here

FAQs

Circular dependency ⚠️

Click to expand

A circular dependency might also be caused when using "barrel files"/index.ts files to group imports. Barrel files should be omitted when it comes to module/provider classes. For example, barrel files should not be used when importing files within the same directory as the barrel file, i.e. cats/cats.controller should not import cats to import the cats/cats.service file. For more details please also see this github issue.

"Cannot resolve dependency" error

Click to expand

If you encountered an error like this:

Nest can't resolve dependencies of the <provider> (?). Please make sure that the argument <unknown_token> at index [<index>] is available in the <module> context.

Potential solutions:
- If <unknown_token> is a provider, is it part of the current <module>?
- If <unknown_token> is exported from a separate @Module, is that module imported within <module>?
  @Module({
    imports: [ /* the Module containing <unknown_token> */ ]
  })

Please make sure that the RedisModule is added directly to the imports array of @Module() decorator of "Root Module"(if isGlobal is true) or "Feature Module"(if isGlobal is false).

Examples of code:

// redis-config.service.ts
import { Injectable } from '@nestjs/common';
import { RedisModuleOptions, RedisOptionsFactory } from '@mvmdev/nestjs-redis';

@Injectable()
export class RedisConfigService implements RedisOptionsFactory {
  createRedisOptions(): RedisModuleOptions {
    return {
      readyLog: true,
      config: {
        host: 'localhost',
        port: 6379,
        password: 'authpassword'
      }
    };
  }
}

✅ Correct

// app.module.ts
import { Module } from '@nestjs/common';
import { RedisModule } from '@mvmdev/nestjs-redis';
import { RedisConfigService } from './redis-config.service';

@Module({
  imports: [
    RedisModule.forRootAsync({
      useClass: RedisConfigService
    })
  ]
})
export class AppModule {}

❌ Incorrect

// my-redis.module.ts
import { Module } from '@nestjs/common';
import { RedisModule } from '@mvmdev/nestjs-redis';
import { RedisConfigService } from './redis-config.service';

@Module({
  imports: [
    RedisModule.forRootAsync({
      useClass: RedisConfigService
    })
  ]
})
export class MyRedisModule {}

// app.module.ts
import { Module } from '@nestjs/common';
import { MyRedisModule } from './my-redis.module';

@Module({
  imports: [MyRedisModule]
})
export class AppModule {}

Roadmap

• Compatible with NestJS ^10
• Flexible custom logger
• Add some examples for TLS

Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement". Don't forget to give the project a star! Thanks again!

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/AmazingFeature)
3. Commit your Changes (git commit -m 'Add some AmazingFeature')
4. Push to the Branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

License

Distributed under the MIT License. See LICENSE for more information.

Acknowledgments

• Full-Featured Redis Client - ioredis
• Official Redis Documentation
• Official Redis Docker Image
• Official Bitnami Redis Docker Image