@knestjs/core/src/differences/change.ts

Knestjs search to be a Nestjs ORM in which you write the models once and only once. This is done creating migrations automatically from the models that you create.

import { Operation } from './operations/operation.type'

export class Change {
    constructor(private readonly forward: Operation, private readonly reverse: Operation ){}

    up(){return this.forward.apply()};
    down(){ return this.reverse.apply()}
}