Method set

lib/associations/belongs-to.js:194–214

* Set the associated model. * * @param {Model} sourceInstance the source instance * @param {?Model|string|number} [associatedInstance] An persisted instance or the primary key of an instance to associate with this. Pass `null` or `undefined` to remove the association. * @param {object} [

(sourceInstance, associatedInstance, options = {})

   *  @returns {Promise}
   */
  async set(sourceInstance, associatedInstance, options = {}) {
    let value = associatedInstance;

    if (associatedInstance instanceof this.target) {
      value = associatedInstance[this.targetKey];
    }

    sourceInstance.set(this.foreignKey, value);

    if (options.save === false) return;

    options = {
      fields: [this.foreignKey],
      allowNull: [this.foreignKey],
      association: true,
      ...options
    };

    // passes the changed field to save, so only that field get updated.
    return await sourceInstance.save(options);
  }

  /**
   * Create a new instance of the associated model and associate it with this.