javascriptnode.jspostgresqlnestjssequelize.js

SequelizeModule — autoLoadModels / [Nest] ERROR SequelizeModule Unable to connect to the database. Retrying


I'm learning Nest.js, I'm trying to connect via SequelizeModule to my local postgres database, but I keep getting this error

Error when starting start:dev

[20:41:14] Starting compilation in watch mode...

[20:41:26] Found 0 errors. Watching for file changes.

[Nest] 14312  - 16.02.2025, 20:41:44     LOG [NestFactory] Starting Nest application...
[Nest] 14312  - 16.02.2025, 20:41:46     LOG [InstanceLoader] AppModule dependencies initialized +1744ms
[Nest] 14312  - 16.02.2025, 20:41:46     LOG [InstanceLoader] SequelizeModule dependencies initialized +0ms
[Nest] 14312  - 16.02.2025, 20:41:46     LOG [InstanceLoader] UsersModule dependencies initialized +1ms
[Nest] 14312  - 16.02.2025, 20:41:46     LOG [InstanceLoader] ConfigHostModule dependencies initialized +0ms
[Nest] 14312  - 16.02.2025, 20:41:46     LOG [InstanceLoader] ConfigModule dependencies initialized +0ms
Executing (default): SELECT 1+1 AS result
Executing (default): SELECT table_name FROM information_schema.tables WHERE table_schema = 'public' AND table_name = 'users'
Executing (default): CREATE TABLE IF NOT EXISTS "users" ("id" NUMBER SERIAL UNIQUE , "email" VARCHAR(255) NOT NULL UNIQUE, "password" VARCHAR(255) NOT NULL, "banned" BOOLEAN DEFAULT false, "banReason" VARCHAR(255), "createdAt" TIMESTAMP WITH TIME ZONE NOT NULL, "updatedAt" TIMESTAMP WITH TIME ZONE NOT NULL, PRIMARY KEY ("id"));
[Nest] 14312  - 16.02.2025, 20:41:46   ERROR [SequelizeModule] Unable to connect to the database. Retrying (1)...
Error
    at Query.run (D:\IT\IT\PROJECTS\my_projects\ulbi\backend_node_nest_docker\node_modules\sequelize\src\dialects\postgres\query.js:76:25)
    at <anonymous> (D:\IT\IT\PROJECTS\my_projects\ulbi\backend_node_nest_docker\node_modules\sequelize\src\sequelize.js:650:28)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at PostgresQueryInterface.createTable (D:\IT\IT\PROJECTS\my_projects\ulbi\backend_node_nest_docker\node_modules\sequelize\src\dialects\abstract\query-interface.js:229:12)
    at Function.sync (D:\IT\IT\PROJECTS\my_projects\ulbi\backend_node_nest_docker\node_modules\sequelize\src\model.js:1353:7)
    at Sequelize.sync (D:\IT\IT\PROJECTS\my_projects\ulbi\backend_node_nest_docker\node_modules\sequelize\src\sequelize.js:825:9)
    at async D:\IT\IT\PROJECTS\my_projects\ulbi\backend_node_nest_docker\node_modules\@nestjs\sequelize\dist\sequelize-core.module.js:123:17

At the beginning, it seems, some manipulations take place, but then an error is thrown without explaining what happened (at least I don't see anything useful here) and then 10 times error after error...

Connecting SequelizeModule in app.module
import { Module } from '@nestjs/common';
import { SequelizeModule } from '@nestjs/sequelize';
import { UsersModule } from './users/users.module';
import { ConfigModule } from '@nestjs/config';
import { User } from './users/users.model';


@Module({
  controllers: [],
  providers: [],
  imports: [
    ConfigModule.forRoot({
      envFilePath: `.${process.env.NODE_ENV}.env`
    }),
    SequelizeModule.forRoot({
      dialect: 'postgres',
      host: process.env.POSTGRES_HOST,
      port: Number(process.env.POSTGRES_PORT),
      username: process.env.POSTGRES_USER,
      password: String(process.env.POSTGRES_PASSWORD),
      database: process.env.POSTGRES_DB,
      models: [User],
      autoLoadModels: false
    }),
    UsersModule,
  ],
})
export class AppModule {}

ps: password via String(), because for some reason it scolded me that it was not a string...

Using in users.module
import { Module } from '@nestjs/common';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';
import { SequelizeModule } from '@nestjs/sequelize';
import { User } from './users.model';

@Module({
  controllers: [UsersController],
  providers: [UsersService],
  imports: [
    SequelizeModule.forFeature([User]),
  ]
})
export class UsersModule {}

.env file

PORT=5000
POSTGRES_HOST=localhost
POSTGRES_USER=postgres
POSTGRES_PASSWORD=admin
POSTGRES_PORT=5432
POSTGRES_DB=ulbi-nest-course

I did some searching and found that it is related to the option autoLoadModels=true;

I tried to set it to false and the error really disappeared, but...

img no error

[20:43:19] Starting compilation in watch mode...

[20:43:23] Found 0 errors. Watching for file changes.

[Nest] 28912  - 16.02.2025, 20:43:25     LOG [NestFactory] Starting Nest application...
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [InstanceLoader] AppModule dependencies initialized +162ms
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [InstanceLoader] SequelizeModule dependencies initialized +0ms
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [InstanceLoader] SequelizeCoreModule dependencies initialized +0ms
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [InstanceLoader] UsersModule dependencies initialized +1ms
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [InstanceLoader] ConfigHostModule dependencies initialized +0ms
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [InstanceLoader] SequelizeModule dependencies initialized +0ms
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [InstanceLoader] ConfigModule dependencies initialized +0ms
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [RoutesResolver] UsersController {/users}: +6ms
[Nest] 28912  - 16.02.2025, 20:43:25     LOG [NestApplication] Nest application successfully started +3ms
Listening on port 5000
absolutely nothing happened in the database, no table was created:

postgresql tables

while I have users.model:

import { Column, DataType, Model, Table } from 'sequelize-typescript';
  
  
interface UserCreationAttrs {
  email: string,
  password: string,
}
  
@Table({tableName: 'users'})
export class User extends Model<User, UserCreationAttrs> {
  @Column({type: DataType.NUMBER, unique: true, autoIncrement: true, primaryKey: true})
  id: number;
  
  @Column({type: DataType.STRING, unique: true, allowNull: false})
  email: string;
  
  @Column({type: DataType.STRING, allowNull: false})
  password: string;
  
  @Column({type: DataType.BOOLEAN, defaultValue: false})
  banned: boolean;
  
  @Column({type: DataType.STRING, allowNull: true})
  banReason: string;
}

Solution

  • Change your users.model.ts from:

    @Column({ type: DataType.NUMBER, unique: true, autoIncrement: true, primaryKey: true })
    id: number;
    

    to:

    @Column({ type: DataType.INTEGER, unique: true, autoIncrement: true, primaryKey: true })
    id: number;