import { Entity, PrimaryGeneratedColumn } from 'typeorm';
import {
  HistoryFor,
  HistoryActionType,
  HistoryActionColumn,
  MappedColumn,
  SnapshotColumn,
} from '@kittgen/nestjs-typeorm-history';

@Entity()
@HistoryFor(User) 
export class UserHistory {

  // some ID column
  @PrimaryGeneratedColumn()
  id: string;

  @SnapshotColumn({ type: 'jsonb' })
  payload: User

  @HistoryActionColumn()
  action: HistoryActionType

  // optional, map payload properties as column
  @MappedColumn<User>((user: User) => user.firstName, { name: 'nickname' })
  nickname: string

  // any other properties
  // ...
}

Properties decorated with @SnapshotColumn and @HistoryActionColumn are required. HistoryActionType supports three possible values: CREATED, UPDATED and DELETED.

The MappedColumn decorator can be used to map properties of an entity directly to a column. You don't need to use jsonb, alternatively you can also use embedded entities:

@Column(() => User, { prefix: 'user' })
payload: User;

Dont't forget to make your history entities known to TypeORM by adding them to the entities property.

// other TypeORM config properties
entities: [User, UserHistory],
// ...

Register the module

In the imports array of your module, add the TypeOrmHistoryModule and call registerAsync.

You have to provide the TypeORM connection.

import { TypeOrmHistoryModule } from '@kittgen/nestjs-typeorm-history';

TypeOrmHistoryModule.registerAsync({
  inject: [Connection],
  useFactory: (connection: Connection) => ({
    connection,
  })
})

Local Development

Local Library Development

Important Commands


# start in watcher mode
npm start

# builds to the 'dist' folder
npm run build

# runs the tests
npm test

Commits

We use conventional commits for nice commit messages and automated versioning/changelog.

This packages uses TSDX.

Credits

This package is based on https://github.com/anchan828/typeorm-helpers

License

Kittgen is licensed under MIT. See LICENSE.

Authors

Kittgen is developed by Otto von Wesendonk and Edgar Müller.