How should nestjs-redis be used correctly? Any example of nestjs-redis? - redis

Question

When I used nestjs-redis recently, there is no official example, I don't know how to use it correctly.
app.module.ts
import { Module } from '#nestjs/common';
import { TypeOrmModule } from '#nestjs/typeorm';
import { typeOrmConfig } from './config/typeorm.config';
import { AuthModule } from './base/auth.module';
import { RedisModule } from 'nestjs-redis';
import { SmsService } from './common/providers/sms.service';
import { redisConfig } from './config/redis.config';
import { RedisClientService } from './common/providers/redis-client.service';
#Module({
imports: [
TypeOrmModule.forRoot(typeOrmConfig),
AuthModule,
RedisModule.register(redisConfig),
],
providers: [SmsService, RedisClientService],
})
export class AppModule {}
redis-client.service.ts
import { Injectable } from '#nestjs/common';
import { RedisService } from 'nestjs-redis';
import * as Redis from 'ioredis';
#Injectable()
export class RedisClientService {
// I want to add a private variable.
private _client
constructor(
private readonly redisService: RedisService,
) {
this.getClient().then((client) => (this._client = client));
}
async getClient(): Promise<Redis.Redis> {
const client = await this.redisService.getClient('main');
return client;
}
async setValue(key: string, value: string, expiryMode: string|any, time: string|any) : Promise<boolean>{
// use _client in this method
// this._client.set() // this is correct?
const client = await this.getClient();
const result = await client.set(key, value, expiryMode, time);
return result == 'OK';
}
}
My example above declares a variable _client, but I don’t know how to use it right?

Answer 1

Here's my resolution:
import { Injectable } from '#nestjs/common';
import { RedisService } from 'nestjs-redis';
import * as Redis from 'ioredis';
#Injectable()
export class RedisClientService {
private _client: Redis.Redis;
constructor(private readonly redisService: RedisService) {
this._client = this.redisService.getClient('main');
}
async getClient(): Promise<Redis.Redis> {
const client = this.redisService.getClient('main');
return client;
}
async setValue(
key: string,
value: string,
expiryMode?: string | any[],
time?: number | string,
): Promise<boolean> {
const result = await this._client.set(key, value, expiryMode, time);
return result == 'OK';
}
async getValue(key: string): Promise<string> {
const result = await this._client.get(key);
return result;
}
}
create a private variable _client in the class.
in constructor initial the value.
use it in the methods: getValue and setValue
perfect.