Method _mergeFunction

src/model.js:823–854

(objValue, srcValue, key)

  }

  static _mergeFunction(objValue, srcValue, key) {
    if (Array.isArray(objValue) && Array.isArray(srcValue)) {
      return _.union(objValue, srcValue);
    }

    if (['where', 'having'].includes(key)) {
      if (this.options && this.options.whereMergeStrategy === 'and') {
        return combineWheresWithAnd(objValue, srcValue);
      }

      if (srcValue instanceof Utils.SequelizeMethod) {
        srcValue = { [Op.and]: srcValue };
      }

      if (_.isPlainObject(objValue) && _.isPlainObject(srcValue)) {
        return Object.assign(objValue, srcValue);
      }
    } else if (key === 'attributes' && _.isPlainObject(objValue) && _.isPlainObject(srcValue)) {
      return _.assignWith(objValue, srcValue, (objValue, srcValue) => {
        if (Array.isArray(objValue) && Array.isArray(srcValue)) {
          return _.union(objValue, srcValue);
        }
      });
    }
    // If we have a possible object/array to clone, we try it.
    // Otherwise, we return the original value when it's not undefined,
    // or the resulting object in that case.
    if (srcValue) {
      return Utils.cloneDeep(srcValue, true);
    }
    return srcValue === undefined ? objValue : srcValue;
  }

  static _assignOptions(...args) {
    return this._baseMerge(...args, this._mergeFunction.bind(this));