How to delete redis cache with prefix using typeorm in Nestjs

Using TypeORM to delete Redis cache with specific prefixes in NestJS typically involves several steps. You will need a service to interact with Redis, which can be implemented using ioredis or NestJS's cache-manager library. Here is an example of the steps to perform:

First, ensure that your NestJS application has installed ioredis, cache-manager, and their corresponding NestJS modules. Below are the commands to install the required dependencies:

bash
npm install ioredis cache-manager
npm install @nestjs/common @nestjs/core

If you use cache-manager, you also need to install the Redis store:

bash
npm install cache-manager-redis-store

Next, configure Redis in your NestJS module. This is typically done in your root module (e.g., AppModule):

typescript
import { CacheModule } from '@nestjs/common';
import * as redisStore from 'cache-manager-redis-store';

@Module({
  imports: [
    CacheModule.register({
      store: redisStore,
      host: 'localhost',
      port: 6379,
      // Other required configuration options...
    }),
    // ...other modules
  ],
  // ...
})
export class AppModule {}

Then, create a service (e.g., CacheService) to encapsulate methods for operating on Redis cache:

typescript
import { Injectable, CacheManager } from '@nestjs/common';
import { Cache } from 'cache-manager';

@Injectable()
export class CacheService {
  constructor(private cacheManager: Cache) {}

  async clearCacheWithPrefix(prefix: string): Promise<void> {
    const keys = await this.cacheManager.store.keys(`${prefix}*`);
    const promises = keys.map((key) => this.cacheManager.del(key));
    await Promise.all(promises);
  }
}

Note that the clearCacheWithPrefix method assumes all cache keys start with the same prefix. This method retrieves all keys matching the prefix and deletes them using the del method.

Finally, in your application, you can inject CacheService and call clearCacheWithPrefix to delete cache entries with a specific prefix. For example, you can do this in a controller or service:

typescript
@Injectable()
export class SomeService {
  constructor(private cacheService: CacheService) {}

  async handleCacheInvalidation() {
    await this.cacheService.clearCacheWithPrefix('myPrefix');
  }
}

In this example, when the handleCacheInvalidation method is called, it deletes all cache keys starting with 'myPrefix'.

This is an example of deleting Redis cache with specific prefixes in a NestJS project. In practice, you may need to adjust these steps based on your specific business logic.