import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { EntityRelation } from '../entity/entity-relation.entity';
import { Repository } from 'typeorm';

@Injectable()
export class EntityRelationRepository {
  constructor(
    @InjectRepository(EntityRelation)
    private readonly entityRelationRepository: Repository<EntityRelation>,
  ) {
  }

  async findBySourceEntityTypeAndTargetEntityType(source_entity_type:string, target_entity_type:string) {
    return await this.entityRelationRepository.findOne({
      where: {
        source_entity_type,
        target_entity_type
      }
    })
  }

}