marianozunino
commented
1 year ago Kiril, that's something that you should be able to achieve with NestJs itself. I need to think over on how to make the config something that you can inject multiple times into the service. Something like this:
import { Injectable, Module } from '@nestjs/common';
import { MorpheusModule, MorpheusService } from 'morpheus4j';
import { ConfigService, ConfigModule } from '@nestjs/config';
@Injectable()
export class CustomMigrationService {
constructor(
private readonly morpheusService: MorpheusService,
private readonly configService: ConfigService,
) {}
async onApplicationBootstrap() {
const configs = [
{
scheme: this.configService.get('DB1_SCHEME'),
host: this.configService.get('DB1_HOST'),
port: this.configService.get('DB1_PORT'),
username: this.configService.get('DB1_USERNAME'),
password: this.configService.get('DB1_PASSWORD'),
migrationsPath: './neo4j/db1/migrations',
},
{
scheme: this.configService.get('DB2_SCHEME'),
host: this.configService.get('DB2_HOST'),
port: this.configService.get('DB2_PORT'),
username: this.configService.get('DB2_USERNAME'),
password: this.configService.get('DB2_PASSWORD'),
migrationsPath: './neo4j/db2/migrations',
},
];
for (const config of configs) {
await this.morpheusService.runMigrationsFor(config);
}
}
}
@Module({
imports: [
ConfigModule.forRoot(),
MorpheusModule,
],
providers: [CustomMigrationService],
})
export class DbModule {}This way you can define your own service and execute the migrations for each config that you have.
Again, in order to do this I need to do some refactoring, so I'll think it over.
ksmv-7
Hello,
We are running multiple instances of Neo4j and use them in a NestJs application. We perform our migrations on application bootstrap with the help of Morpheus4j. Hence, we are wondering if there is a way to apply the migrations to all instances which are loaded in the application - each instance is a separate host.
Thanks in advance, Kiril