TypeError: someClass is not a constructor

Issue type:

[ ] question [x] bug report [ ] feature request [x] documentation issue

Database system/driver:

[ ] cordova [ ] mongodb [ ] mssql [ ] mysql / mariadb [ ] oracle [x] postgres [ ] cockroachdb [ ] sqlite [ ] sqljs [ ] react-native [ ] expo

TypeORM version:

[x] latest [ ] @next [ ] 0.x.x (or put your version here)

Steps to reproduce or a small repository showing the problem:

I have been trying for hours to generate a migration, but seems that everything is leading to a typeorm error

this is my Entity

import { Entity, PrimaryGeneratedColumn, Column, CreateDateColumn, UpdateDateColumn } from "typeorm";

@Entity()
export class CommentEntity {
  @PrimaryGeneratedColumn()
  id!: number;

  @CreateDateColumn()
  createdAt!: Date;

  @UpdateDateColumn()
  updatedAt!: Date;

  @Column()
  userNickname!: string;

  @Column()
  content!: string;
}

this is my ormconfig.json

{
   "type": "postgres",
   "host": "localhost",
   "port": 5432,
   "username": "postgres",
   "password": "",
   "database": "postgres",
   "logging": false,
   "entities": [
      "modules/comments/CommentEntity.ts"
   ],
   "migrations": [
      "migrations/*.ts"
   ],
   "cli": {
      "migrationsDir": "migrations"
   }
}

and then I run

./node_modules/.bin/ts-node ./node_modules/typeorm/cli.js migration:generate -n Comment

this is the output of the script

TypeError: someClass is not a constructor
    at class_1.get (/home/user/Development/myapp/src/src/container.ts:34:51)
    at Object.getFromContainer (/home/user/Development/myapp/src/src/container.ts:71:29)
    at /home/user/Development/myapp/src/src/connection/ConnectionMetadataBuilder.ts:35:58
    at Array.map (<anonymous>)
    at ConnectionMetadataBuilder.buildMigrations 
    (/home/user/Development/myapp/src/src/connection/ConnectionMetadataBuilder.ts:35:36)
    at Connection.buildMetadatas (/home/user/Development/myapp/src/src/connection/Connection.ts:520:54)
    at Connection.<anonymous> (/home/user/Development/myapp/src/src/connection/Connection.ts:191:18)
    at step (/home/user/Development/myapp/src/node_modules/tslib/tslib.js:136:27)
    at Object.next (/home/user/Development/myapp/src/node_modules/tslib/tslib.js:117:57)
    at fulfilled (/home/user/Development/myapp/src/node_modules/tslib/tslib.js:107:62)

I have tried for a full text search on my IDE for someClass because it looks like some kind of placeholder for testing that someone forgot in the code, but there was nothing.

Thanks

Issue Analytics

State:
Created 4 years ago
Reactions:8
Comments:13 (1 by maintainers)

Top GitHub Comments

14reactions

DimosthenisKcommented, Feb 7, 2020

I KNEW I had seen that before. Take a look at my previous issue: https://github.com/typeorm/typeorm/issues/5079

You have a file inside your migrations dir that isn’t a TS file or doesn’t match your migration file glob pattern

4reactions

kaushiksamantacommented, Feb 17, 2020

This is the correct way to initialize migrations and entities:- (https://github.com/nrwl/nx/issues/803)

import * as entities from './src/entities';

const contexts = (require as any).context('../../apps/api/src/migrations/', true, /\.ts$/);
const migrations = contexts.keys()
  .map(modulePath => contexts(modulePath))
  .reduce((result, migrationModule) => {
    result.concat(Object.keys(migrationModule).map(key => migrationModule[key]), [])
  });

export const dbConfig: TypeOrmModuleOptions = {
  type: 'postgres',
  host: process.env.POSTGRES_HOST,
  port: Number(process.env.POSTGRES_PORT),
  username: process.env.POSTGRES_USER,
  password: process.env.POSTGRES_PASSWORD,
  database: process.env.POSTGRES_DATABASE,
  entities: Object.values(entities),
  synchronize: false,
  migrationsRun: true,
  logging: true,
  migrations: Object.values(migrations)
};