Method previous

lib/model.js:3796–3802

* Returns the previous value for key from `_previousDataValues`. * * If called without a key, returns the previous values for all values which have changed * * @param {string} [key] key to get previous value of * * @returns {any|Array<any>}

(key)

   * @returns {any|Array<any>}
   */
  previous(key) {
    if (key) {
      return this._previousDataValues[key];
    }

    return _.pickBy(this._previousDataValues, (value, key) => this.changed(key));
  }

  _setInclude(key, value, options) {
    if (!Array.isArray(value)) value = [value];