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RReactiflux CDCloudflare Developers PPrisma

•Created by RedRoss on 10/23/2024 in #help-and-questions

how can I implement an abstract class to apply the repository pattern?

I use nestjs and would like to implement the pattern repository as it is used in typeorm

import { Prisma, PrismaClient } from '@prisma/client';
import { BaseInterfaceRepository } from './base.interface.repository';

export abstract class BaseAbstractRepository<T, CreateInput>
  implements BaseInterfaceRepository<T, CreateInput>
{
  protected readonly prisma: PrismaClient;
  protected modelName: T; // What type should I use?

  protected constructor(prisma: PrismaClient, modelName: T) {
    this.prisma = prisma;
    this.modelName = modelName;
  }

  public async create(
    data: CreateInput,
    transaction?: Prisma.TransactionClient,
  ): Promise<T> {
    try {
      if (transaction) {
        return await transaction[this.modelName].create({ data });
      }
      return await this.modelName.create({ data });
    } catch (error) {
      throw new Error(`Failed to create entity: ${error.message}`);
    }
  }

  public async findOneById(
    id: number,
    transaction?: Prisma.TransactionClient,
  ): Promise<T | null> {
    try {
      if (transaction) {
        return await transaction[this.modelName].findUnique({ where: { id } });
      }
      return await this.modelName.findUnique({ where: { id } });
    } catch (error) {
      throw new Error(`Failed to find entity with id ${id}: ${error.message}`);
    }
  }

  public async remove(
    id: number,
    transaction?: Prisma.TransactionClient,
  ): Promise<T> {
    try {
      if (transaction) {
        return await transaction[this.modelName].delete({ where: { id } });
      }
      return await this.modelName.delete({ where: { id } });
    } catch (error) {
      throw new Error(
        `Failed to remove entity with id ${id}: ${error.message}`,
      );
    }
  }
}

import { Prisma, PrismaClient } from '@prisma/client';
import { BaseInterfaceRepository } from './base.interface.repository';

export abstract class BaseAbstractRepository<T, CreateInput>
  implements BaseInterfaceRepository<T, CreateInput>
{
  protected readonly prisma: PrismaClient;
  protected modelName: T; // What type should I use?

  protected constructor(prisma: PrismaClient, modelName: T) {
    this.prisma = prisma;
    this.modelName = modelName;
  }

  public async create(
    data: CreateInput,
    transaction?: Prisma.TransactionClient,
  ): Promise<T> {
    try {
      if (transaction) {
        return await transaction[this.modelName].create({ data });
      }
      return await this.modelName.create({ data });
    } catch (error) {
      throw new Error(`Failed to create entity: ${error.message}`);
    }
  }

  public async findOneById(
    id: number,
    transaction?: Prisma.TransactionClient,
  ): Promise<T | null> {
    try {
      if (transaction) {
        return await transaction[this.modelName].findUnique({ where: { id } });
      }
      return await this.modelName.findUnique({ where: { id } });
    } catch (error) {
      throw new Error(`Failed to find entity with id ${id}: ${error.message}`);
    }
  }

  public async remove(
    id: number,
    transaction?: Prisma.TransactionClient,
  ): Promise<T> {
    try {
      if (transaction) {
        return await transaction[this.modelName].delete({ where: { id } });
      }
      return await this.modelName.delete({ where: { id } });
    } catch (error) {
      throw new Error(
        `Failed to remove entity with id ${id}: ${error.message}`,
      );
    }
  }
}

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