Get the cron expression from the config too

[peixotoleonardo]

Is there an existing issue that is already proposing this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe it

I would like load cron expression from a config, without implement a dynamic cron job.

Describe the solution you'd like

import { Module } from '@nestjs/common';
import { ScheduleModule } from '@nestjs/schedule';

@Module({
  imports: [
    ScheduleModule.forRoot({
       crons: {
           'task-service.handleCron': '45 * * * * *',
       }
    })
  ],
})
export class AppModule {}

import { Injectable, Logger } from '@nestjs/common';
import { Cron } from '@nestjs/schedule';

@Injectable()
export class TasksService {
  private readonly logger = new Logger(TasksService.name);

  @Cron('task-service.handleCron')
  handleCron() {
    this.logger.debug('Called when the current second is 45');
  }
}

Teachability, documentation, adoption, migration strategy

No response

What is the motivation / use case for changing the behavior?

I believe that using cron expressions in hard code is not useful because there are use cases where the cron expression could be changed, and defining it as a config will facilitate that change, although we can register dynamically using schedule register, I believe that having this via decorator would be really useful.