Entity with Nestjs

July 4, 2023

Nest can’t resolve dependencies of the StoryController, but problem in this constructor

I really don’t unserstand where my error

In this part code Error (why I don’t understand)
more details: all work without

 constructor(
    @InjectRepository(StoryEvent)

    private readonly storyRepository: Repository<StoryEvent>,
  ) {}

story.event.ts

import { Column, Entity, PrimaryGeneratedColumn } from 'typeorm';

@Entity()
export class StoryEvent {
  @PrimaryGeneratedColumn()
  id: number;
  @Column()
  title: string;
  @Column()
  text: string;
  @Column()
  author: string;
  @Column()
  date: string;
}

story.controller.ts

import { Controller, Get, Param } from '@nestjs/common';
import { Repository } from 'typeorm';
import { StoryEvent } from './story.event';
import { InjectRepository } from '@nestjs/typeorm';

@Controller('/story')
export class StoryController {
  constructor(
    @InjectRepository(StoryEvent)
    private readonly storyRepository: Repository<StoryEvent>,
  ) {}

  @Get(':id')
  getStory(@Param() params: number) {
    return params;
  }
}

all okay

app.module.ts

import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';

import { TypeOrmModule } from '@nestjs/typeorm';
import { StoryEvent } from './story/story.event';
import { StoryController } from './story/story.controller';

@Module({
  imports: [
    TypeOrmModule.forRoot({
      type: 'postgres',
      host: 'localhost',
      port: 5432,
      username: 'postgres',
      password: 'EXAMPLE',
      database: 'postgres',
      entities: [StoryEvent],
      synchronize: true,
    }),
  ],
  controllers: [AppController, StoryController],
  providers: [AppService],
})
export class AppModule {}

Upd:
log in console:

[Nest] 3052  - 04.07.2023, 22:28:15     LOG [NestFactory] Starting Nest application...
[Nest] 3052  - 04.07.2023, 22:28:15     LOG [InstanceLoader] TypeOrmModule dependencies initialized +53ms
[Nest] 3052  - 04.07.2023, 22:28:15   ERROR [ExceptionHandler] Nest can't resolve dependencies of the StoryContro
ller (?). Please make sure that the argument StoryEventRepository at index [0] is available in the AppModule cont
ext.

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

p.s. Thank u so much

code without error, see docs

>Solution :

Okay, so if you don’t have a StoryModule what you need to do is add TypeormModule.forFeature([StoryEvent]) into the imports of yourAppModule along with the TypeormModule.forRoot(). This creates the injection token Nest needs to know how to map the @InjectRepository(StoryEvent)