basemodel.js

import { Model } from 'objection';
import AuditLog from './AuditLog';

export default class BaseModel extends Model {
  static auditKeys = [];
  static auditSanitize = modelObj => (
    // upto other models to implent their own logic
    // for auditSanitize
    this.constructor.auditSanitize
      ? this.constructor.auditSanitize(modelObj)
      : modelObj
  );

  async $afterInsert(queryContext) {
    await super.$afterInsert(queryContext);

    if (this.constructor.auditKeys.length) {
      await AuditLog.log(
        queryContext.transaction,
        { verb: 'insert', model: this }
      );
    }
  }

  async $afterUpdate(opt, queryContext) {
    const { old } = opt;
    await super.$afterUpdate(opt, queryContext);

    if (this.constructor.auditKeys.length) {
      await AuditLog.log(
        queryContext.transaction,
        { verb: 'update', model: old, updatedModel: this }
      );
    }
  }
}