Method set

lib/associations/has-one.js:193–228

* 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) {
    options = { ...options, scope: false };

    const oldInstance = await sourceInstance[this.accessors.get](options);
    // TODO Use equals method once #5605 is resolved
    const alreadyAssociated = oldInstance && associatedInstance && this.target.primaryKeyAttributes.every(attribute =>
      oldInstance.get(attribute, { raw: true }) === (associatedInstance.get ? associatedInstance.get(attribute, { raw: true }) : associatedInstance)
    );

    if (oldInstance && !alreadyAssociated) {
      oldInstance[this.foreignKey] = null;

      await oldInstance.save({
        ...options,
        fields: [this.foreignKey],
        allowNull: [this.foreignKey],
        association: true
      });
    }
    if (associatedInstance && !alreadyAssociated) {
      if (!(associatedInstance instanceof this.target)) {
        const tmpInstance = {};
        tmpInstance[this.target.primaryKeyAttribute] = associatedInstance;
        associatedInstance = this.target.build(tmpInstance, {
          isNewRecord: false
        });
      }

      Object.assign(associatedInstance, this.scope);
      associatedInstance.set(this.foreignKey, sourceInstance.get(this.sourceKeyAttribute));

      return associatedInstance.save(options);
    }

    return null;
  }

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