Nest 無法解析...的依賴關系...請確保索引 [0] 處的參數 .. 在

Question

我有：

import { Injectable } from '@nestjs/common';
import { InjectModel } from '@nestjs/sequelize';
import { Conversation } from './conversation.model'
import { FindConversationsDto } from '../dto/conversations.find'

@Injectable()
export class ConversationsService {
    constructor(
        @InjectModel(Conversation)
        private conversationModel: typeof Conversation
    ) { }

    async findConversations(queryParams: FindConversationsDto): Promise<Conversation[]> {
        return new Promise((resolve) => [])
        // return await this.conversationModel.findAll();


    }
}

我得到了這個奇怪的錯誤：

Nest can't resolve dependencies of the ConversationsService (?). Please make sure that the argument ConversationRepository at index [0] is available in the ConversationsModule context.

Potential solutions:
- If ConversationRepository is a provider, is it part of the current ConversationsModule?
- If ConversationRepository is exported from a separate @Module, is that module imported within ConversationsModule?
  @Module({
    imports: [ /* the Module containing ConversationRepository */ ]
  })

ConversationModule是：

import { Module } from '@nestjs/common';
import { ConversationsController } from './conversations.controller';
import { ConversationsService } from './conversations.service';

@Module({
  controllers: [ConversationsController],
  providers: [ConversationsService]
})
export class ConversationsModule {}

不確定ConversationRepository指的是什么。

Answer 1

您需要將SequelizeModule.forFeature()添加到您的ConversationModule的imports數組中，以告訴 Nest 在此模塊的上下文中，我可以訪問ConversationRepository 。 該術語是從 TypeORM 借用的，與 TypeO 一樣，您有實體和存儲庫，但是對於 Sequelize，您有模型和表，但總體思路是相同的。 你的ConverstationModule應該看起來像這樣：

@Module({
  imports: [SequelizeModule.forFeature([Conversation])],
  providers: [ConversationService],
  controllers: [ConversationController]
})
export class ConversationModule {}